{"title":"Ranking","description":"","products":[{"product_id":"166848402","title":"Chinese Gosu 1 underglaze (100g)","description":"\u003ch2\u003e[Quality \u0026amp; Craftsmanship]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/Y2FwLTE0LW1pbg.jpg?cmsp_timestamp=20240605201618\" alt=\"High quality Arita blue and white porcelain\"\u003e\u003cbr\u003eFor over half a century, blue and white porcelain (Sometsuke) and Somenishiki ware created using Fukaumi Shouten's Gosu (blue underglaze) have been beloved by royalty and aristocrats worldwide, and proudly exhibited in museums.\u003cbr\u003e\u003cbr\u003e\u003cstrong style=\"color: #005bd3;\"\u003eFeatured on the BBC and Japanese National Television\u003c\/strong\u003e\u003cbr\u003eOur profound history and traditional techniques caught the attention of the world when we were featured on the prestigious UK television series, \u003cstrong\u003eBBC's \u003cem\u003e\"Great Japanese Railway Journeys\"\u003c\/em\u003e\u003c\/strong\u003e.\u003cbr\u003eIn Japan, artists utilizing our Gosu have been featured on prominent programs such as \"Wafu Souhonke\" and NHK's \"Ippin,\" which highlight the nation's finest traditional craftsmanship.\u003cbr\u003e\u003cbr\u003eOur products are also trusted for official signage at research institutions and government agencies throughout Japan. We promise to deliver this world-recognized, authentic Arita Blue directly to your studio.\u003c\/p\u003e\n\u003ch2\u003e[The Manufacturing Process]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"Gosu production process with traditional stone mill\" src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc\/DSC01766-min.jpg?cmsp_timestamp=20221222111934\"\u003e\u003cbr\u003eTo maintain this exceptional quality, it takes more than a month from the start of production to completion for Fukaumi Shouten's Gosu.\u003cbr\u003e\u003cbr\u003eBy combining \u003cstrong\u003e\u003cu\u003eFukaumi Shouten's unique ingredient blend\u003c\/u\u003e\u003c\/strong\u003e, \u003cstrong\u003e\u003cu\u003eour proprietary firing technique (Calcination)\u003c\/u\u003e\u003c\/strong\u003e, and \u003cstrong\u003e\u003cu\u003ethe only stone-milling technology in Japan to micro-pulverize the grains\u003c\/u\u003e\u003c\/strong\u003e, we achieve the ultimate underglaze.\u003cbr\u003e\u003cbr\u003eThrough these rigorous processes, \u003cstrong\u003e\u003cu\u003ebrushstrokes become incredibly smooth, and the Gosu is highly resistant to burning out, even at high concentrations\u003c\/u\u003e\u003c\/strong\u003e.\u003cbr\u003e\u003cstrong\u003e\u003cu\u003eYou will not need to hand-grind the pigment yourself once it arrives; it is ready to use.\u003c\/u\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003eFukaumi Shouten is the only historic Gosu manufacturer that sells its products directly online to individuals worldwide. That is why we can offer authentic, professional-grade quality directly from our factory.\u003c\/p\u003e\n\u003cdiv style=\"margin: 30px 0;\" class=\"youtube\"\u003e\u003ciframe title=\"Fukaumi Shouten Gosu Manufacturing Process\" src=\"https:\/\/www.youtube.com\/embed\/1myOuT9yp4s?si=J6uVaUCtCXrHTky3\" height=\"315\" width=\"100%\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003ch2\u003e[The History of Gosu in Arita]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"Antique Arita ware showing traditional blue underglaze\" src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0yNC1taW4.jpg?cmsp_timestamp=20240605191806\"\u003e\u003cbr\u003eThe synthetic Gosu currently used throughout Japan was developed by the Fukaumi family during the early Meiji period (late 19th century).\u003cbr\u003e\u003cbr\u003eIn 1870, the renowned German chemist Gottfried Wagener was invited to Arita.\u003cbr\u003eDr. Wagener taught Heizaemon Fukaumi and his sons, Suminosuke and Takeji, the chemical method of producing the color blue using cobalt.\u003cbr\u003e\u003cbr\u003eFollowing this, the Fukaumi family conducted extensive research and successfully developed a scientific method for producing stable Gosu.\u003cbr\u003eAs a result, vivid and reliable synthetic Gosu began to be widely used in Arita and across Japan, establishing the world-famous \"Japan Blue\".\u003cbr\u003e\u003cbr\u003ePlease experience our premium Gosu, born from centuries of history, tradition, and the power of chemistry.\u003cbr\u003e\u003cimg style=\"margin-top: 15px;\" alt=\"Fukaumi Shouten Gosu powder and paste\" src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0zNS1taW4.jpg?cmsp_timestamp=20240605191806\"\u003e\u003c\/p\u003e\n\u003ch2\u003e[How to Use]\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Type\u003c\/strong\u003e: Suitable for both Porcelain and Stoneware\/Earthenware.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Method\u003c\/strong\u003e: Suitable for both Oxidation and Reduction firing.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOptimal Firing Temperature\u003c\/strong\u003e: 1230°C – 1300°C (2246°F – 2372°F)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e[Firing Conditions for Sample Plates]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"Gosu color sample plates fired in reduction\" src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/MjAyNDAxR09TVV9zYW1wbGVzLW1pbg.jpg?cmsp_timestamp=20240605194159\"\u003e\u003cbr\u003eThe color samples shown in the main product images were fired under the following conditions:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Body\u003c\/strong\u003e: Amakusa Pottery Stone (Porcelain)\u003cbr\u003e\u003cspan style=\"font-size: 0.85em; color: #666;\"\u003e(Composition: SiO2 72.04%, Al2O3 18.16%, Fe2O3 0.65%, TiO2 0.04%, CaO 0.49%, MgO 0.09%, Na2O 0.58%, K2O 3.00%, Ig.Loss 4.55%)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Temperature \u0026amp; Atmosphere\u003c\/strong\u003e: 1280°C (2336°F) \/ Reduction Firing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"color: #d32f2f; font-weight: bold; margin-top: 10px;\"\u003e*Note: The color of the underglaze will change depending on your clay body and whether you use oxidation or reduction firing. Please test in your own kiln.\u003c\/p\u003e\n\u003ch2\u003e[Frequently Asked Questions]\u003c\/h2\u003e\n\u003cdl\u003e\n\u003cdt style=\"font-weight: bold; margin-top: 15px;\"\u003eQ: How do I use the pigment?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: It arrives in a highly concentrated paste form. Please dilute it with water according to your purpose. For line drawing (outlining), a general guide is 1 part Gosu to 3 parts water. For Dami (washes), use 1 teaspoon of Gosu to 80ml-250ml of water. Please adjust to find your ideal shade.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: Should I add a binder or adhesive (like gum arabic or CMC)?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Our Gosu does not contain added binders to allow you flexibility. If the pigment is not adhering well to your bisque ware, or if your painting process requires touching the surface repeatedly, we recommend adding a small amount of your preferred binder.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: How should I store it if I won't use it for a long time?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: We recommend storing it tightly sealed in the container. If it dries out, simply add water and grind it again in a mortar to return it to a paste.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: What causes the pigment to crawl or repel during firing?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Applying the pigment too thickly is the most common cause of crawling. It can also be caused by dust or oil (from hands) on the bisque ware before painting.\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003ch2\u003e[Shipping \u0026amp; Postage (International)]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"Fast Shipping\" src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/ZGVsaXZlcnlfMWRheQ.png?cmsp_timestamp=20240605194647\"\u003e\u003cbr\u003eIf you place your order \u003cu\u003ebefore noon (JST)\u003c\/u\u003e, it will generally be shipped \u003cspan style=\"color: #d32f2f;\"\u003e\u003cstrong\u003e\u003cu\u003ethe next business day\u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e from our factory in Japan.\u003cbr\u003e\u003cem\u003e*If your order includes made-to-order items like specific glazes, the entire order will be shipped once all items are ready.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAbout Shipping Fees:\u003c\/strong\u003e\u003cbr\u003eShipping costs are \u003cstrong\u003eautomatically calculated at checkout\u003c\/strong\u003e based on the total weight of your order and your delivery address (Country\/Region).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAvailable Shipping Methods:\u003c\/strong\u003e\u003cbr\u003eDuring checkout, you can choose the delivery method that best suits your needs.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eEMS (Express Mail Service)\u003c\/strong\u003e: Fast and reliable with tracking, but shipping fees are higher. Typically arrives in 3 to 7 days depending on the destination.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSurface Mail (Sea Mail)\u003c\/strong\u003e: The most economical option with lower shipping fees, but delivery is slow. It typically takes 1 to 3 months to arrive.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003e*Please note that customs duties or import taxes may apply upon arrival in your country, which are the responsibility of the buyer.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u0026nbsp;\u003c\/p\u003e","brand":"株式会社深海商店","offers":[{"title":"Paste 100g","offer_id":49065082683683,"sku":"100260","price":2300.0,"currency_code":"JPY","in_stock":true},{"title":"Dry flour 100g","offer_id":50274479800611,"sku":"100261","price":2900.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0523\/0115\/files\/002___EC-min.jpg?v=1770941404"},{"product_id":"166959529","title":"Chinese Gosu 2 underglaze(100g)","description":"\u003ch2\u003e[Quality \u0026amp; Craftsmanship]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"High quality Arita blue and white porcelain\" src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/Y2FwLTE0LW1pbg.jpg?cmsp_timestamp=20240605201618\"\u003e\u003cbr\u003eFor over half a century, blue and white porcelain (Sometsuke) and Somenishiki ware created using Fukaumi Shouten's Gosu (blue underglaze) have been beloved by royalty and aristocrats worldwide, and proudly exhibited in museums.\u003cbr\u003e\u003cbr\u003e\u003cstrong style=\"color: #005bd3;\"\u003eFeatured on the BBC and Japanese National Television\u003c\/strong\u003e\u003cbr\u003eOur profound history and traditional techniques caught the attention of the world when we were featured on the prestigious UK television series, \u003cstrong\u003eBBC's \u003cem\u003e\"Great Japanese Railway Journeys\"\u003c\/em\u003e\u003c\/strong\u003e.\u003cbr\u003eIn Japan, artists utilizing our Gosu have been featured on prominent programs such as \"Wafu Souhonke\" and NHK's \"Ippin,\" which highlight the nation's finest traditional craftsmanship.\u003cbr\u003e\u003cbr\u003eOur products are also trusted for official signage at research institutions and government agencies throughout Japan. We promise to deliver this world-recognized, authentic Arita Blue directly to your studio.\u003c\/p\u003e\n\u003ch2\u003e[The Manufacturing Process]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc\/DSC01766-min.jpg?cmsp_timestamp=20221222111934\" alt=\"Gosu production process with traditional stone mill\"\u003e\u003cbr\u003eTo maintain this exceptional quality, it takes more than a month from the start of production to completion for Fukaumi Shouten's Gosu.\u003cbr\u003e\u003cbr\u003eBy combining \u003cstrong\u003e\u003cu\u003eFukaumi Shouten's unique ingredient blend\u003c\/u\u003e\u003c\/strong\u003e, \u003cstrong\u003e\u003cu\u003eour proprietary firing technique (Calcination)\u003c\/u\u003e\u003c\/strong\u003e, and \u003cstrong\u003e\u003cu\u003ethe only stone-milling technology in Japan to micro-pulverize the grains\u003c\/u\u003e\u003c\/strong\u003e, we achieve the ultimate underglaze.\u003cbr\u003e\u003cbr\u003eThrough these rigorous processes, \u003cstrong\u003e\u003cu\u003ebrushstrokes become incredibly smooth, and the Gosu is highly resistant to burning out, even at high concentrations\u003c\/u\u003e\u003c\/strong\u003e.\u003cbr\u003e\u003cstrong\u003e\u003cu\u003eYou will not need to hand-grind the pigment yourself once it arrives; it is ready to use.\u003c\/u\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003eFukaumi Shouten is the only historic Gosu manufacturer that sells its products directly online to individuals worldwide. That is why we can offer authentic, professional-grade quality directly from our factory.\u003c\/p\u003e\n\u003cdiv class=\"youtube\" style=\"margin: 30px 0;\"\u003e\u003ciframe width=\"100%\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/1myOuT9yp4s?si=J6uVaUCtCXrHTky3\" title=\"Fukaumi Shouten Gosu Manufacturing Process\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003ch2\u003e[The History of Gosu in Arita]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0yNC1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Antique Arita ware showing traditional blue underglaze\"\u003e\u003cbr\u003eThe synthetic Gosu currently used throughout Japan was developed by the Fukaumi family during the early Meiji period (late 19th century).\u003cbr\u003e\u003cbr\u003eIn 1870, the renowned German chemist Gottfried Wagener was invited to Arita.\u003cbr\u003eDr. Wagener taught Heizaemon Fukaumi and his sons, Suminosuke and Takeji, the chemical method of producing the color blue using cobalt.\u003cbr\u003e\u003cbr\u003eFollowing this, the Fukaumi family conducted extensive research and successfully developed a scientific method for producing stable Gosu.\u003cbr\u003eAs a result, vivid and reliable synthetic Gosu began to be widely used in Arita and across Japan, establishing the world-famous \"Japan Blue\".\u003cbr\u003e\u003cbr\u003ePlease experience our premium Gosu, born from centuries of history, tradition, and the power of chemistry.\u003cbr\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0zNS1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Fukaumi Shouten Gosu powder and paste\" style=\"margin-top: 15px;\"\u003e\u003c\/p\u003e\n\u003ch2\u003e[How to Use]\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Type\u003c\/strong\u003e: Suitable for both Porcelain and Stoneware\/Earthenware.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Method\u003c\/strong\u003e: Suitable for both Oxidation and Reduction firing.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOptimal Firing Temperature\u003c\/strong\u003e: 1230°C – 1300°C (2246°F – 2372°F)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e[Firing Conditions for Sample Plates]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/MjAyNDAxR09TVV9zYW1wbGVzLW1pbg.jpg?cmsp_timestamp=20240605194159\" alt=\"Gosu color sample plates fired in reduction\"\u003e\u003cbr\u003eThe color samples shown in the main product images were fired under the following conditions:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Body\u003c\/strong\u003e: Amakusa Pottery Stone (Porcelain)\u003cbr\u003e\u003cspan style=\"font-size: 0.85em; color: #666;\"\u003e(Composition: SiO2 72.04%, Al2O3 18.16%, Fe2O3 0.65%, TiO2 0.04%, CaO 0.49%, MgO 0.09%, Na2O 0.58%, K2O 3.00%, Ig.Loss 4.55%)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Temperature \u0026amp; Atmosphere\u003c\/strong\u003e: 1280°C (2336°F) \/ Reduction Firing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"color: #d32f2f; font-weight: bold; margin-top: 10px;\"\u003e*Note: The color of the underglaze will change depending on your clay body and whether you use oxidation or reduction firing. Please test in your own kiln.\u003c\/p\u003e\n\u003ch2\u003e[Frequently Asked Questions]\u003c\/h2\u003e\n\u003cdl\u003e\n\u003cdt style=\"font-weight: bold; margin-top: 15px;\"\u003eQ: How do I use the pigment?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: It arrives in a highly concentrated paste form. Please dilute it with water according to your purpose. For line drawing (outlining), a general guide is 1 part Gosu to 3 parts water. For Dami (washes), use 1 teaspoon of Gosu to 80ml-250ml of water. Please adjust to find your ideal shade.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: Should I add a binder or adhesive (like gum arabic or CMC)?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Our Gosu does not contain added binders to allow you flexibility. If the pigment is not adhering well to your bisque ware, or if your painting process requires touching the surface repeatedly, we recommend adding a small amount of your preferred binder.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: How should I store it if I won't use it for a long time?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: We recommend storing it tightly sealed in the container. If it dries out, simply add water and grind it again in a mortar to return it to a paste.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: What causes the pigment to crawl or repel during firing?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Applying the pigment too thickly is the most common cause of crawling. It can also be caused by dust or oil (from hands) on the bisque ware before painting.\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003ch2\u003e[Shipping \u0026amp; Postage (International)]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/ZGVsaXZlcnlfMWRheQ.png?cmsp_timestamp=20240605194647\" alt=\"Fast Shipping\"\u003e\u003cbr\u003eIf you place your order \u003cu\u003ebefore noon (JST)\u003c\/u\u003e, it will generally be shipped \u003cspan style=\"color: #d32f2f;\"\u003e\u003cstrong\u003e\u003cu\u003ethe next business day\u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e from our factory in Japan.\u003cbr\u003e\u003cem\u003e*If your order includes made-to-order items like specific glazes, the entire order will be shipped once all items are ready.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAbout Shipping Fees:\u003c\/strong\u003e\u003cbr\u003eShipping costs are \u003cstrong\u003eautomatically calculated at checkout\u003c\/strong\u003e based on the total weight of your order and your delivery address (Country\/Region).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAvailable Shipping Methods:\u003c\/strong\u003e\u003cbr\u003eDuring checkout, you can choose the delivery method that best suits your needs.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eEMS (Express Mail Service)\u003c\/strong\u003e: Fast and reliable with tracking, but shipping fees are higher. Typically arrives in 3 to 7 days depending on the destination.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSurface Mail (Sea Mail)\u003c\/strong\u003e: The most economical option with lower shipping fees, but delivery is slow. It typically takes 1 to 3 months to arrive.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003e*Please note that customs duties or import taxes may apply upon arrival in your country, which are the responsibility of the buyer.\u003c\/em\u003e\u003c\/p\u003e","brand":"株式会社深海商店","offers":[{"title":"Paste 100g","offer_id":49065111322915,"sku":"100270","price":2200.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0523\/0115\/files\/004___EC-min.jpg?v=1770941356"},{"product_id":"166959591","title":"Chinese Gosu 3 underglaze(100g)","description":"\u003ch2\u003e[Quality \u0026amp; Craftsmanship]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"High quality Arita blue and white porcelain\" src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/Y2FwLTE0LW1pbg.jpg?cmsp_timestamp=20240605201618\"\u003e\u003cbr\u003eFor over half a century, blue and white porcelain (Sometsuke) and Somenishiki ware created using Fukaumi Shouten's Gosu (blue underglaze) have been beloved by royalty and aristocrats worldwide, and proudly exhibited in museums.\u003cbr\u003e\u003cbr\u003e\u003cstrong style=\"color: #005bd3;\"\u003eFeatured on the BBC and Japanese National Television\u003c\/strong\u003e\u003cbr\u003eOur profound history and traditional techniques caught the attention of the world when we were featured on the prestigious UK television series, \u003cstrong\u003eBBC's \u003cem\u003e\"Great Japanese Railway Journeys\"\u003c\/em\u003e\u003c\/strong\u003e.\u003cbr\u003eIn Japan, artists utilizing our Gosu have been featured on prominent programs such as \"Wafu Souhonke\" and NHK's \"Ippin,\" which highlight the nation's finest traditional craftsmanship.\u003cbr\u003e\u003cbr\u003eOur products are also trusted for official signage at research institutions and government agencies throughout Japan. We promise to deliver this world-recognized, authentic Arita Blue directly to your studio.\u003c\/p\u003e\n\u003ch2\u003e[The Manufacturing Process]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc\/DSC01766-min.jpg?cmsp_timestamp=20221222111934\" alt=\"Gosu production process with traditional stone mill\"\u003e\u003cbr\u003eTo maintain this exceptional quality, it takes more than a month from the start of production to completion for Fukaumi Shouten's Gosu.\u003cbr\u003e\u003cbr\u003eBy combining \u003cstrong\u003e\u003cu\u003eFukaumi Shouten's unique ingredient blend\u003c\/u\u003e\u003c\/strong\u003e, \u003cstrong\u003e\u003cu\u003eour proprietary firing technique (Calcination)\u003c\/u\u003e\u003c\/strong\u003e, and \u003cstrong\u003e\u003cu\u003ethe only stone-milling technology in Japan to micro-pulverize the grains\u003c\/u\u003e\u003c\/strong\u003e, we achieve the ultimate underglaze.\u003cbr\u003e\u003cbr\u003eThrough these rigorous processes, \u003cstrong\u003e\u003cu\u003ebrushstrokes become incredibly smooth, and the Gosu is highly resistant to burning out, even at high concentrations\u003c\/u\u003e\u003c\/strong\u003e.\u003cbr\u003e\u003cstrong\u003e\u003cu\u003eYou will not need to hand-grind the pigment yourself once it arrives; it is ready to use.\u003c\/u\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003eFukaumi Shouten is the only historic Gosu manufacturer that sells its products directly online to individuals worldwide. That is why we can offer authentic, professional-grade quality directly from our factory.\u003c\/p\u003e\n\u003cdiv class=\"youtube\" style=\"margin: 30px 0;\"\u003e\u003ciframe width=\"100%\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/1myOuT9yp4s?si=J6uVaUCtCXrHTky3\" title=\"Fukaumi Shouten Gosu Manufacturing Process\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003ch2\u003e[The History of Gosu in Arita]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0yNC1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Antique Arita ware showing traditional blue underglaze\"\u003e\u003cbr\u003eThe synthetic Gosu currently used throughout Japan was developed by the Fukaumi family during the early Meiji period (late 19th century).\u003cbr\u003e\u003cbr\u003eIn 1870, the renowned German chemist Gottfried Wagener was invited to Arita.\u003cbr\u003eDr. Wagener taught Heizaemon Fukaumi and his sons, Suminosuke and Takeji, the chemical method of producing the color blue using cobalt.\u003cbr\u003e\u003cbr\u003eFollowing this, the Fukaumi family conducted extensive research and successfully developed a scientific method for producing stable Gosu.\u003cbr\u003eAs a result, vivid and reliable synthetic Gosu began to be widely used in Arita and across Japan, establishing the world-famous \"Japan Blue\".\u003cbr\u003e\u003cbr\u003ePlease experience our premium Gosu, born from centuries of history, tradition, and the power of chemistry.\u003cbr\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0zNS1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Fukaumi Shouten Gosu powder and paste\" style=\"margin-top: 15px;\"\u003e\u003c\/p\u003e\n\u003ch2\u003e[How to Use]\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Type\u003c\/strong\u003e: Suitable for both Porcelain and Stoneware\/Earthenware.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Method\u003c\/strong\u003e: Suitable for both Oxidation and Reduction firing.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOptimal Firing Temperature\u003c\/strong\u003e: 1230°C – 1300°C (2246°F – 2372°F)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e[Firing Conditions for Sample Plates]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/MjAyNDAxR09TVV9zYW1wbGVzLW1pbg.jpg?cmsp_timestamp=20240605194159\" alt=\"Gosu color sample plates fired in reduction\"\u003e\u003cbr\u003eThe color samples shown in the main product images were fired under the following conditions:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Body\u003c\/strong\u003e: Amakusa Pottery Stone (Porcelain)\u003cbr\u003e\u003cspan style=\"font-size: 0.85em; color: #666;\"\u003e(Composition: SiO2 72.04%, Al2O3 18.16%, Fe2O3 0.65%, TiO2 0.04%, CaO 0.49%, MgO 0.09%, Na2O 0.58%, K2O 3.00%, Ig.Loss 4.55%)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Temperature \u0026amp; Atmosphere\u003c\/strong\u003e: 1280°C (2336°F) \/ Reduction Firing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"color: #d32f2f; font-weight: bold; margin-top: 10px;\"\u003e*Note: The color of the underglaze will change depending on your clay body and whether you use oxidation or reduction firing. Please test in your own kiln.\u003c\/p\u003e\n\u003ch2\u003e[Frequently Asked Questions]\u003c\/h2\u003e\n\u003cdl\u003e\n\u003cdt style=\"font-weight: bold; margin-top: 15px;\"\u003eQ: How do I use the pigment?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: It arrives in a highly concentrated paste form. Please dilute it with water according to your purpose. For line drawing (outlining), a general guide is 1 part Gosu to 3 parts water. For Dami (washes), use 1 teaspoon of Gosu to 80ml-250ml of water. Please adjust to find your ideal shade.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: Should I add a binder or adhesive (like gum arabic or CMC)?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Our Gosu does not contain added binders to allow you flexibility. If the pigment is not adhering well to your bisque ware, or if your painting process requires touching the surface repeatedly, we recommend adding a small amount of your preferred binder.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: How should I store it if I won't use it for a long time?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: We recommend storing it tightly sealed in the container. If it dries out, simply add water and grind it again in a mortar to return it to a paste.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: What causes the pigment to crawl or repel during firing?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Applying the pigment too thickly is the most common cause of crawling. It can also be caused by dust or oil (from hands) on the bisque ware before painting.\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003ch2\u003e[Shipping \u0026amp; Postage (International)]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/ZGVsaXZlcnlfMWRheQ.png?cmsp_timestamp=20240605194647\" alt=\"Fast Shipping\"\u003e\u003cbr\u003eIf you place your order \u003cu\u003ebefore noon (JST)\u003c\/u\u003e, it will generally be shipped \u003cspan style=\"color: #d32f2f;\"\u003e\u003cstrong\u003e\u003cu\u003ethe next business day\u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e from our factory in Japan.\u003cbr\u003e\u003cem\u003e*If your order includes made-to-order items like specific glazes, the entire order will be shipped once all items are ready.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAbout Shipping Fees:\u003c\/strong\u003e\u003cbr\u003eShipping costs are \u003cstrong\u003eautomatically calculated at checkout\u003c\/strong\u003e based on the total weight of your order and your delivery address (Country\/Region).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAvailable Shipping Methods:\u003c\/strong\u003e\u003cbr\u003eDuring checkout, you can choose the delivery method that best suits your needs.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eEMS (Express Mail Service)\u003c\/strong\u003e: Fast and reliable with tracking, but shipping fees are higher. Typically arrives in 3 to 7 days depending on the destination.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSurface Mail (Sea Mail)\u003c\/strong\u003e: The most economical option with lower shipping fees, but delivery is slow. It typically takes 1 to 3 months to arrive.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003e*Please note that customs duties or import taxes may apply upon arrival in your country, which are the responsibility of the buyer.\u003c\/em\u003e\u003c\/p\u003e","brand":"株式会社深海商店","offers":[{"title":"Paste 100g","offer_id":49065091760419,"sku":"100280","price":2200.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0523\/0115\/files\/007___EC-min.jpg?v=1770941339"},{"product_id":"166959630","title":"Chinese Gosu 4 underglaze(100g)","description":"\u003ch2\u003e[Quality \u0026amp; Craftsmanship]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"High quality Arita blue and white porcelain\" src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/Y2FwLTE0LW1pbg.jpg?cmsp_timestamp=20240605201618\"\u003e\u003cbr\u003eFor over half a century, blue and white porcelain (Sometsuke) and Somenishiki ware created using Fukaumi Shouten's Gosu (blue underglaze) have been beloved by royalty and aristocrats worldwide, and proudly exhibited in museums.\u003cbr\u003e\u003cbr\u003e\u003cstrong style=\"color: #005bd3;\"\u003eFeatured on the BBC and Japanese National Television\u003c\/strong\u003e\u003cbr\u003eOur profound history and traditional techniques caught the attention of the world when we were featured on the prestigious UK television series, \u003cstrong\u003eBBC's \u003cem\u003e\"Great Japanese Railway Journeys\"\u003c\/em\u003e\u003c\/strong\u003e.\u003cbr\u003eIn Japan, artists utilizing our Gosu have been featured on prominent programs such as \"Wafu Souhonke\" and NHK's \"Ippin,\" which highlight the nation's finest traditional craftsmanship.\u003cbr\u003e\u003cbr\u003eOur products are also trusted for official signage at research institutions and government agencies throughout Japan. We promise to deliver this world-recognized, authentic Arita Blue directly to your studio.\u003c\/p\u003e\n\u003ch2\u003e[The Manufacturing Process]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc\/DSC01766-min.jpg?cmsp_timestamp=20221222111934\" alt=\"Gosu production process with traditional stone mill\"\u003e\u003cbr\u003eTo maintain this exceptional quality, it takes more than a month from the start of production to completion for Fukaumi Shouten's Gosu.\u003cbr\u003e\u003cbr\u003eBy combining \u003cstrong\u003e\u003cu\u003eFukaumi Shouten's unique ingredient blend\u003c\/u\u003e\u003c\/strong\u003e, \u003cstrong\u003e\u003cu\u003eour proprietary firing technique (Calcination)\u003c\/u\u003e\u003c\/strong\u003e, and \u003cstrong\u003e\u003cu\u003ethe only stone-milling technology in Japan to micro-pulverize the grains\u003c\/u\u003e\u003c\/strong\u003e, we achieve the ultimate underglaze.\u003cbr\u003e\u003cbr\u003eThrough these rigorous processes, \u003cstrong\u003e\u003cu\u003ebrushstrokes become incredibly smooth, and the Gosu is highly resistant to burning out, even at high concentrations\u003c\/u\u003e\u003c\/strong\u003e.\u003cbr\u003e\u003cstrong\u003e\u003cu\u003eYou will not need to hand-grind the pigment yourself once it arrives; it is ready to use.\u003c\/u\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003eFukaumi Shouten is the only historic Gosu manufacturer that sells its products directly online to individuals worldwide. That is why we can offer authentic, professional-grade quality directly from our factory.\u003c\/p\u003e\n\u003cdiv class=\"youtube\" style=\"margin: 30px 0;\"\u003e\u003ciframe width=\"100%\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/1myOuT9yp4s?si=J6uVaUCtCXrHTky3\" title=\"Fukaumi Shouten Gosu Manufacturing Process\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003ch2\u003e[The History of Gosu in Arita]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0yNC1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Antique Arita ware showing traditional blue underglaze\"\u003e\u003cbr\u003eThe synthetic Gosu currently used throughout Japan was developed by the Fukaumi family during the early Meiji period (late 19th century).\u003cbr\u003e\u003cbr\u003eIn 1870, the renowned German chemist Gottfried Wagener was invited to Arita.\u003cbr\u003eDr. Wagener taught Heizaemon Fukaumi and his sons, Suminosuke and Takeji, the chemical method of producing the color blue using cobalt.\u003cbr\u003e\u003cbr\u003eFollowing this, the Fukaumi family conducted extensive research and successfully developed a scientific method for producing stable Gosu.\u003cbr\u003eAs a result, vivid and reliable synthetic Gosu began to be widely used in Arita and across Japan, establishing the world-famous \"Japan Blue\".\u003cbr\u003e\u003cbr\u003ePlease experience our premium Gosu, born from centuries of history, tradition, and the power of chemistry.\u003cbr\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0zNS1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Fukaumi Shouten Gosu powder and paste\" style=\"margin-top: 15px;\"\u003e\u003c\/p\u003e\n\u003ch2\u003e[How to Use]\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Type\u003c\/strong\u003e: Suitable for both Porcelain and Stoneware\/Earthenware.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Method\u003c\/strong\u003e: Suitable for both Oxidation and Reduction firing.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOptimal Firing Temperature\u003c\/strong\u003e: 1230°C – 1300°C (2246°F – 2372°F)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e[Firing Conditions for Sample Plates]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/MjAyNDAxR09TVV9zYW1wbGVzLW1pbg.jpg?cmsp_timestamp=20240605194159\" alt=\"Gosu color sample plates fired in reduction\"\u003e\u003cbr\u003eThe color samples shown in the main product images were fired under the following conditions:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Body\u003c\/strong\u003e: Amakusa Pottery Stone (Porcelain)\u003cbr\u003e\u003cspan style=\"font-size: 0.85em; color: #666;\"\u003e(Composition: SiO2 72.04%, Al2O3 18.16%, Fe2O3 0.65%, TiO2 0.04%, CaO 0.49%, MgO 0.09%, Na2O 0.58%, K2O 3.00%, Ig.Loss 4.55%)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Temperature \u0026amp; Atmosphere\u003c\/strong\u003e: 1280°C (2336°F) \/ Reduction Firing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"color: #d32f2f; font-weight: bold; margin-top: 10px;\"\u003e*Note: The color of the underglaze will change depending on your clay body and whether you use oxidation or reduction firing. Please test in your own kiln.\u003c\/p\u003e\n\u003ch2\u003e[Frequently Asked Questions]\u003c\/h2\u003e\n\u003cdl\u003e\n\u003cdt style=\"font-weight: bold; margin-top: 15px;\"\u003eQ: How do I use the pigment?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: It arrives in a highly concentrated paste form. Please dilute it with water according to your purpose. For line drawing (outlining), a general guide is 1 part Gosu to 3 parts water. For Dami (washes), use 1 teaspoon of Gosu to 80ml-250ml of water. Please adjust to find your ideal shade.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: Should I add a binder or adhesive (like gum arabic or CMC)?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Our Gosu does not contain added binders to allow you flexibility. If the pigment is not adhering well to your bisque ware, or if your painting process requires touching the surface repeatedly, we recommend adding a small amount of your preferred binder.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: How should I store it if I won't use it for a long time?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: We recommend storing it tightly sealed in the container. If it dries out, simply add water and grind it again in a mortar to return it to a paste.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: What causes the pigment to crawl or repel during firing?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Applying the pigment too thickly is the most common cause of crawling. It can also be caused by dust or oil (from hands) on the bisque ware before painting.\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003ch2\u003e[Shipping \u0026amp; Postage (International)]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/ZGVsaXZlcnlfMWRheQ.png?cmsp_timestamp=20240605194647\" alt=\"Fast Shipping\"\u003e\u003cbr\u003eIf you place your order \u003cu\u003ebefore noon (JST)\u003c\/u\u003e, it will generally be shipped \u003cspan style=\"color: #d32f2f;\"\u003e\u003cstrong\u003e\u003cu\u003ethe next business day\u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e from our factory in Japan.\u003cbr\u003e\u003cem\u003e*If your order includes made-to-order items like specific glazes, the entire order will be shipped once all items are ready.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAbout Shipping Fees:\u003c\/strong\u003e\u003cbr\u003eShipping costs are \u003cstrong\u003eautomatically calculated at checkout\u003c\/strong\u003e based on the total weight of your order and your delivery address (Country\/Region).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAvailable Shipping Methods:\u003c\/strong\u003e\u003cbr\u003eDuring checkout, you can choose the delivery method that best suits your needs.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eEMS (Express Mail Service)\u003c\/strong\u003e: Fast and reliable with tracking, but shipping fees are higher. Typically arrives in 3 to 7 days depending on the destination.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSurface Mail (Sea Mail)\u003c\/strong\u003e: The most economical option with lower shipping fees, but delivery is slow. It typically takes 1 to 3 months to arrive.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003e*Please note that customs duties or import taxes may apply upon arrival in your country, which are the responsibility of the buyer.\u003c\/em\u003e\u003c\/p\u003e","brand":"株式会社深海商店","offers":[{"title":"Paste 100g","offer_id":49065138946339,"sku":"102110","price":2100.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0523\/0115\/files\/009___EC-min.jpg?v=1723447646"},{"product_id":"166959698","title":"Chinese Gosu 5 underglaze (100g)","description":"\u003ch2\u003e[Quality \u0026amp; Craftsmanship]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"High quality Arita blue and white porcelain\" src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/Y2FwLTE0LW1pbg.jpg?cmsp_timestamp=20240605201618\"\u003e\u003cbr\u003eFor over half a century, blue and white porcelain (Sometsuke) and Somenishiki ware created using Fukaumi Shouten's Gosu (blue underglaze) have been beloved by royalty and aristocrats worldwide, and proudly exhibited in museums.\u003cbr\u003e\u003cbr\u003e\u003cstrong style=\"color: #005bd3;\"\u003eFeatured on the BBC and Japanese National Television\u003c\/strong\u003e\u003cbr\u003eOur profound history and traditional techniques caught the attention of the world when we were featured on the prestigious UK television series, \u003cstrong\u003eBBC's \u003cem\u003e\"Great Japanese Railway Journeys\"\u003c\/em\u003e\u003c\/strong\u003e.\u003cbr\u003eIn Japan, artists utilizing our Gosu have been featured on prominent programs such as \"Wafu Souhonke\" and NHK's \"Ippin,\" which highlight the nation's finest traditional craftsmanship.\u003cbr\u003e\u003cbr\u003eOur products are also trusted for official signage at research institutions and government agencies throughout Japan. We promise to deliver this world-recognized, authentic Arita Blue directly to your studio.\u003c\/p\u003e\n\u003ch2\u003e[The Manufacturing Process]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc\/DSC01766-min.jpg?cmsp_timestamp=20221222111934\" alt=\"Gosu production process with traditional stone mill\"\u003e\u003cbr\u003eTo maintain this exceptional quality, it takes more than a month from the start of production to completion for Fukaumi Shouten's Gosu.\u003cbr\u003e\u003cbr\u003eBy combining \u003cstrong\u003e\u003cu\u003eFukaumi Shouten's unique ingredient blend\u003c\/u\u003e\u003c\/strong\u003e, \u003cstrong\u003e\u003cu\u003eour proprietary firing technique (Calcination)\u003c\/u\u003e\u003c\/strong\u003e, and \u003cstrong\u003e\u003cu\u003ethe only stone-milling technology in Japan to micro-pulverize the grains\u003c\/u\u003e\u003c\/strong\u003e, we achieve the ultimate underglaze.\u003cbr\u003e\u003cbr\u003eThrough these rigorous processes, \u003cstrong\u003e\u003cu\u003ebrushstrokes become incredibly smooth, and the Gosu is highly resistant to burning out, even at high concentrations\u003c\/u\u003e\u003c\/strong\u003e.\u003cbr\u003e\u003cstrong\u003e\u003cu\u003eYou will not need to hand-grind the pigment yourself once it arrives; it is ready to use.\u003c\/u\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003eFukaumi Shouten is the only historic Gosu manufacturer that sells its products directly online to individuals worldwide. That is why we can offer authentic, professional-grade quality directly from our factory.\u003c\/p\u003e\n\u003cdiv class=\"youtube\" style=\"margin: 30px 0;\"\u003e\u003ciframe width=\"100%\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/1myOuT9yp4s?si=J6uVaUCtCXrHTky3\" title=\"Fukaumi Shouten Gosu Manufacturing Process\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003ch2\u003e[The History of Gosu in Arita]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0yNC1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Antique Arita ware showing traditional blue underglaze\"\u003e\u003cbr\u003eThe synthetic Gosu currently used throughout Japan was developed by the Fukaumi family during the early Meiji period (late 19th century).\u003cbr\u003e\u003cbr\u003eIn 1870, the renowned German chemist Gottfried Wagener was invited to Arita.\u003cbr\u003eDr. Wagener taught Heizaemon Fukaumi and his sons, Suminosuke and Takeji, the chemical method of producing the color blue using cobalt.\u003cbr\u003e\u003cbr\u003eFollowing this, the Fukaumi family conducted extensive research and successfully developed a scientific method for producing stable Gosu.\u003cbr\u003eAs a result, vivid and reliable synthetic Gosu began to be widely used in Arita and across Japan, establishing the world-famous \"Japan Blue\".\u003cbr\u003e\u003cbr\u003ePlease experience our premium Gosu, born from centuries of history, tradition, and the power of chemistry.\u003cbr\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0zNS1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Fukaumi Shouten Gosu powder and paste\" style=\"margin-top: 15px;\"\u003e\u003c\/p\u003e\n\u003ch2\u003e[How to Use]\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Type\u003c\/strong\u003e: Suitable for both Porcelain and Stoneware\/Earthenware.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Method\u003c\/strong\u003e: Suitable for both Oxidation and Reduction firing.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOptimal Firing Temperature\u003c\/strong\u003e: 1230°C – 1300°C (2246°F – 2372°F)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e[Firing Conditions for Sample Plates]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/MjAyNDAxR09TVV9zYW1wbGVzLW1pbg.jpg?cmsp_timestamp=20240605194159\" alt=\"Gosu color sample plates fired in reduction\"\u003e\u003cbr\u003eThe color samples shown in the main product images were fired under the following conditions:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Body\u003c\/strong\u003e: Amakusa Pottery Stone (Porcelain)\u003cbr\u003e\u003cspan style=\"font-size: 0.85em; color: #666;\"\u003e(Composition: SiO2 72.04%, Al2O3 18.16%, Fe2O3 0.65%, TiO2 0.04%, CaO 0.49%, MgO 0.09%, Na2O 0.58%, K2O 3.00%, Ig.Loss 4.55%)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Temperature \u0026amp; Atmosphere\u003c\/strong\u003e: 1280°C (2336°F) \/ Reduction Firing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"color: #d32f2f; font-weight: bold; margin-top: 10px;\"\u003e*Note: The color of the underglaze will change depending on your clay body and whether you use oxidation or reduction firing. Please test in your own kiln.\u003c\/p\u003e\n\u003ch2\u003e[Frequently Asked Questions]\u003c\/h2\u003e\n\u003cdl\u003e\n\u003cdt style=\"font-weight: bold; margin-top: 15px;\"\u003eQ: How do I use the pigment?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: It arrives in a highly concentrated paste form. Please dilute it with water according to your purpose. For line drawing (outlining), a general guide is 1 part Gosu to 3 parts water. For Dami (washes), use 1 teaspoon of Gosu to 80ml-250ml of water. Please adjust to find your ideal shade.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: Should I add a binder or adhesive (like gum arabic or CMC)?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Our Gosu does not contain added binders to allow you flexibility. If the pigment is not adhering well to your bisque ware, or if your painting process requires touching the surface repeatedly, we recommend adding a small amount of your preferred binder.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: How should I store it if I won't use it for a long time?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: We recommend storing it tightly sealed in the container. If it dries out, simply add water and grind it again in a mortar to return it to a paste.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: What causes the pigment to crawl or repel during firing?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Applying the pigment too thickly is the most common cause of crawling. It can also be caused by dust or oil (from hands) on the bisque ware before painting.\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003ch2\u003e[Shipping \u0026amp; Postage (International)]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/ZGVsaXZlcnlfMWRheQ.png?cmsp_timestamp=20240605194647\" alt=\"Fast Shipping\"\u003e\u003cbr\u003eIf you place your order \u003cu\u003ebefore noon (JST)\u003c\/u\u003e, it will generally be shipped \u003cspan style=\"color: #d32f2f;\"\u003e\u003cstrong\u003e\u003cu\u003ethe next business day\u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e from our factory in Japan.\u003cbr\u003e\u003cem\u003e*If your order includes made-to-order items like specific glazes, the entire order will be shipped once all items are ready.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAbout Shipping Fees:\u003c\/strong\u003e\u003cbr\u003eShipping costs are \u003cstrong\u003eautomatically calculated at checkout\u003c\/strong\u003e based on the total weight of your order and your delivery address (Country\/Region).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAvailable Shipping Methods:\u003c\/strong\u003e\u003cbr\u003eDuring checkout, you can choose the delivery method that best suits your needs.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eEMS (Express Mail Service)\u003c\/strong\u003e: Fast and reliable with tracking, but shipping fees are higher. Typically arrives in 3 to 7 days depending on the destination.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSurface Mail (Sea Mail)\u003c\/strong\u003e: The most economical option with lower shipping fees, but delivery is slow. It typically takes 1 to 3 months to arrive.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003e*Please note that customs duties or import taxes may apply upon arrival in your country, which are the responsibility of the buyer.\u003c\/em\u003e\u003c\/p\u003e","brand":"株式会社深海商店","offers":[{"title":"Paste 100g","offer_id":49065121972515,"sku":"100290","price":2200.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0523\/0115\/files\/010___EC-min.jpg?v=1723447528"},{"product_id":"166959720","title":"Chinese Gosu 6 underglaze (100g)","description":"\u003ch2\u003e[Quality \u0026amp; Craftsmanship]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"High quality Arita blue and white porcelain\" src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/Y2FwLTE0LW1pbg.jpg?cmsp_timestamp=20240605201618\"\u003e\u003cbr\u003eFor over half a century, blue and white porcelain (Sometsuke) and Somenishiki ware created using Fukaumi Shouten's Gosu (blue underglaze) have been beloved by royalty and aristocrats worldwide, and proudly exhibited in museums.\u003cbr\u003e\u003cbr\u003e\u003cstrong style=\"color: #005bd3;\"\u003eFeatured on the BBC and Japanese National Television\u003c\/strong\u003e\u003cbr\u003eOur profound history and traditional techniques caught the attention of the world when we were featured on the prestigious UK television series, \u003cstrong\u003eBBC's \u003cem\u003e\"Great Japanese Railway Journeys\"\u003c\/em\u003e\u003c\/strong\u003e.\u003cbr\u003eIn Japan, artists utilizing our Gosu have been featured on prominent programs such as \"Wafu Souhonke\" and NHK's \"Ippin,\" which highlight the nation's finest traditional craftsmanship.\u003cbr\u003e\u003cbr\u003eOur products are also trusted for official signage at research institutions and government agencies throughout Japan. We promise to deliver this world-recognized, authentic Arita Blue directly to your studio.\u003c\/p\u003e\n\u003ch2\u003e[The Manufacturing Process]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc\/DSC01766-min.jpg?cmsp_timestamp=20221222111934\" alt=\"Gosu production process with traditional stone mill\"\u003e\u003cbr\u003eTo maintain this exceptional quality, it takes more than a month from the start of production to completion for Fukaumi Shouten's Gosu.\u003cbr\u003e\u003cbr\u003eBy combining \u003cstrong\u003e\u003cu\u003eFukaumi Shouten's unique ingredient blend\u003c\/u\u003e\u003c\/strong\u003e, \u003cstrong\u003e\u003cu\u003eour proprietary firing technique (Calcination)\u003c\/u\u003e\u003c\/strong\u003e, and \u003cstrong\u003e\u003cu\u003ethe only stone-milling technology in Japan to micro-pulverize the grains\u003c\/u\u003e\u003c\/strong\u003e, we achieve the ultimate underglaze.\u003cbr\u003e\u003cbr\u003eThrough these rigorous processes, \u003cstrong\u003e\u003cu\u003ebrushstrokes become incredibly smooth, and the Gosu is highly resistant to burning out, even at high concentrations\u003c\/u\u003e\u003c\/strong\u003e.\u003cbr\u003e\u003cstrong\u003e\u003cu\u003eYou will not need to hand-grind the pigment yourself once it arrives; it is ready to use.\u003c\/u\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003eFukaumi Shouten is the only historic Gosu manufacturer that sells its products directly online to individuals worldwide. That is why we can offer authentic, professional-grade quality directly from our factory.\u003c\/p\u003e\n\u003cdiv class=\"youtube\" style=\"margin: 30px 0;\"\u003e\u003ciframe width=\"100%\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/1myOuT9yp4s?si=J6uVaUCtCXrHTky3\" title=\"Fukaumi Shouten Gosu Manufacturing Process\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003ch2\u003e[The History of Gosu in Arita]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0yNC1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Antique Arita ware showing traditional blue underglaze\"\u003e\u003cbr\u003eThe synthetic Gosu currently used throughout Japan was developed by the Fukaumi family during the early Meiji period (late 19th century).\u003cbr\u003e\u003cbr\u003eIn 1870, the renowned German chemist Gottfried Wagener was invited to Arita.\u003cbr\u003eDr. Wagener taught Heizaemon Fukaumi and his sons, Suminosuke and Takeji, the chemical method of producing the color blue using cobalt.\u003cbr\u003e\u003cbr\u003eFollowing this, the Fukaumi family conducted extensive research and successfully developed a scientific method for producing stable Gosu.\u003cbr\u003eAs a result, vivid and reliable synthetic Gosu began to be widely used in Arita and across Japan, establishing the world-famous \"Japan Blue\".\u003cbr\u003e\u003cbr\u003ePlease experience our premium Gosu, born from centuries of history, tradition, and the power of chemistry.\u003cbr\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0zNS1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Fukaumi Shouten Gosu powder and paste\" style=\"margin-top: 15px;\"\u003e\u003c\/p\u003e\n\u003ch2\u003e[How to Use]\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Type\u003c\/strong\u003e: Suitable for both Porcelain and Stoneware\/Earthenware.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Method\u003c\/strong\u003e: Suitable for both Oxidation and Reduction firing.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOptimal Firing Temperature\u003c\/strong\u003e: 1230°C – 1300°C (2246°F – 2372°F)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e[Firing Conditions for Sample Plates]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/MjAyNDAxR09TVV9zYW1wbGVzLW1pbg.jpg?cmsp_timestamp=20240605194159\" alt=\"Gosu color sample plates fired in reduction\"\u003e\u003cbr\u003eThe color samples shown in the main product images were fired under the following conditions:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Body\u003c\/strong\u003e: Amakusa Pottery Stone (Porcelain)\u003cbr\u003e\u003cspan style=\"font-size: 0.85em; color: #666;\"\u003e(Composition: SiO2 72.04%, Al2O3 18.16%, Fe2O3 0.65%, TiO2 0.04%, CaO 0.49%, MgO 0.09%, Na2O 0.58%, K2O 3.00%, Ig.Loss 4.55%)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Temperature \u0026amp; Atmosphere\u003c\/strong\u003e: 1280°C (2336°F) \/ Reduction Firing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"color: #d32f2f; font-weight: bold; margin-top: 10px;\"\u003e*Note: The color of the underglaze will change depending on your clay body and whether you use oxidation or reduction firing. Please test in your own kiln.\u003c\/p\u003e\n\u003ch2\u003e[Frequently Asked Questions]\u003c\/h2\u003e\n\u003cdl\u003e\n\u003cdt style=\"font-weight: bold; margin-top: 15px;\"\u003eQ: How do I use the pigment?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: It arrives in a highly concentrated paste form. Please dilute it with water according to your purpose. For line drawing (outlining), a general guide is 1 part Gosu to 3 parts water. For Dami (washes), use 1 teaspoon of Gosu to 80ml-250ml of water. Please adjust to find your ideal shade.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: Should I add a binder or adhesive (like gum arabic or CMC)?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Our Gosu does not contain added binders to allow you flexibility. If the pigment is not adhering well to your bisque ware, or if your painting process requires touching the surface repeatedly, we recommend adding a small amount of your preferred binder.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: How should I store it if I won't use it for a long time?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: We recommend storing it tightly sealed in the container. If it dries out, simply add water and grind it again in a mortar to return it to a paste.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: What causes the pigment to crawl or repel during firing?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Applying the pigment too thickly is the most common cause of crawling. It can also be caused by dust or oil (from hands) on the bisque ware before painting.\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003ch2\u003e[Shipping \u0026amp; Postage (International)]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/ZGVsaXZlcnlfMWRheQ.png?cmsp_timestamp=20240605194647\" alt=\"Fast Shipping\"\u003e\u003cbr\u003eIf you place your order \u003cu\u003ebefore noon (JST)\u003c\/u\u003e, it will generally be shipped \u003cspan style=\"color: #d32f2f;\"\u003e\u003cstrong\u003e\u003cu\u003ethe next business day\u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e from our factory in Japan.\u003cbr\u003e\u003cem\u003e*If your order includes made-to-order items like specific glazes, the entire order will be shipped once all items are ready.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAbout Shipping Fees:\u003c\/strong\u003e\u003cbr\u003eShipping costs are \u003cstrong\u003eautomatically calculated at checkout\u003c\/strong\u003e based on the total weight of your order and your delivery address (Country\/Region).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAvailable Shipping Methods:\u003c\/strong\u003e\u003cbr\u003eDuring checkout, you can choose the delivery method that best suits your needs.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eEMS (Express Mail Service)\u003c\/strong\u003e: Fast and reliable with tracking, but shipping fees are higher. Typically arrives in 3 to 7 days depending on the destination.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSurface Mail (Sea Mail)\u003c\/strong\u003e: The most economical option with lower shipping fees, but delivery is slow. It typically takes 1 to 3 months to arrive.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003e*Please note that customs duties or import taxes may apply upon arrival in your country, which are the responsibility of the buyer.\u003c\/em\u003e\u003c\/p\u003e","brand":"株式会社深海商店","offers":[{"title":"Paste 100g","offer_id":49065135341859,"sku":"100300","price":2200.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0523\/0115\/files\/012___EC-min.jpg?v=1723447622"},{"product_id":"166959995","title":"Kaiheki in Toku 1 underglaze (100g)","description":"\u003ch2\u003e[Quality \u0026amp; Craftsmanship]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"High quality Arita blue and white porcelain\" src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/Y2FwLTE0LW1pbg.jpg?cmsp_timestamp=20240605201618\"\u003e\u003cbr\u003eFor over half a century, blue and white porcelain (Sometsuke) and Somenishiki ware created using Fukaumi Shouten's Gosu (blue underglaze) have been beloved by royalty and aristocrats worldwide, and proudly exhibited in museums.\u003cbr\u003e\u003cbr\u003e\u003cstrong style=\"color: #005bd3;\"\u003eFeatured on the BBC and Japanese National Television\u003c\/strong\u003e\u003cbr\u003eOur profound history and traditional techniques caught the attention of the world when we were featured on the prestigious UK television series, \u003cstrong\u003eBBC's \u003cem\u003e\"Great Japanese Railway Journeys\"\u003c\/em\u003e\u003c\/strong\u003e.\u003cbr\u003eIn Japan, artists utilizing our Gosu have been featured on prominent programs such as \"Wafu Souhonke\" and NHK's \"Ippin,\" which highlight the nation's finest traditional craftsmanship.\u003cbr\u003e\u003cbr\u003eOur products are also trusted for official signage at research institutions and government agencies throughout Japan. We promise to deliver this world-recognized, authentic Arita Blue directly to your studio.\u003c\/p\u003e\n\u003ch2\u003e[The Manufacturing Process]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc\/DSC01766-min.jpg?cmsp_timestamp=20221222111934\" alt=\"Gosu production process with traditional stone mill\"\u003e\u003cbr\u003eTo maintain this exceptional quality, it takes more than a month from the start of production to completion for Fukaumi Shouten's Gosu.\u003cbr\u003e\u003cbr\u003eBy combining \u003cstrong\u003e\u003cu\u003eFukaumi Shouten's unique ingredient blend\u003c\/u\u003e\u003c\/strong\u003e, \u003cstrong\u003e\u003cu\u003eour proprietary firing technique (Calcination)\u003c\/u\u003e\u003c\/strong\u003e, and \u003cstrong\u003e\u003cu\u003ethe only stone-milling technology in Japan to micro-pulverize the grains\u003c\/u\u003e\u003c\/strong\u003e, we achieve the ultimate underglaze.\u003cbr\u003e\u003cbr\u003eThrough these rigorous processes, \u003cstrong\u003e\u003cu\u003ebrushstrokes become incredibly smooth, and the Gosu is highly resistant to burning out, even at high concentrations\u003c\/u\u003e\u003c\/strong\u003e.\u003cbr\u003e\u003cstrong\u003e\u003cu\u003eYou will not need to hand-grind the pigment yourself once it arrives; it is ready to use.\u003c\/u\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003eFukaumi Shouten is the only historic Gosu manufacturer that sells its products directly online to individuals worldwide. That is why we can offer authentic, professional-grade quality directly from our factory.\u003c\/p\u003e\n\u003cdiv class=\"youtube\" style=\"margin: 30px 0;\"\u003e\u003ciframe width=\"100%\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/1myOuT9yp4s?si=J6uVaUCtCXrHTky3\" title=\"Fukaumi Shouten Gosu Manufacturing Process\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003ch2\u003e[The History of Gosu in Arita]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0yNC1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Antique Arita ware showing traditional blue underglaze\"\u003e\u003cbr\u003eThe synthetic Gosu currently used throughout Japan was developed by the Fukaumi family during the early Meiji period (late 19th century).\u003cbr\u003e\u003cbr\u003eIn 1870, the renowned German chemist Gottfried Wagener was invited to Arita.\u003cbr\u003eDr. Wagener taught Heizaemon Fukaumi and his sons, Suminosuke and Takeji, the chemical method of producing the color blue using cobalt.\u003cbr\u003e\u003cbr\u003eFollowing this, the Fukaumi family conducted extensive research and successfully developed a scientific method for producing stable Gosu.\u003cbr\u003eAs a result, vivid and reliable synthetic Gosu began to be widely used in Arita and across Japan, establishing the world-famous \"Japan Blue\".\u003cbr\u003e\u003cbr\u003ePlease experience our premium Gosu, born from centuries of history, tradition, and the power of chemistry.\u003cbr\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0zNS1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Fukaumi Shouten Gosu powder and paste\" style=\"margin-top: 15px;\"\u003e\u003c\/p\u003e\n\u003ch2\u003e[How to Use]\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Type\u003c\/strong\u003e: Suitable for both Porcelain and Stoneware\/Earthenware.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Method\u003c\/strong\u003e: Suitable for both Oxidation and Reduction firing.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOptimal Firing Temperature\u003c\/strong\u003e: 1230°C – 1300°C (2246°F – 2372°F)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e[Firing Conditions for Sample Plates]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/MjAyNDAxR09TVV9zYW1wbGVzLW1pbg.jpg?cmsp_timestamp=20240605194159\" alt=\"Gosu color sample plates fired in reduction\"\u003e\u003cbr\u003eThe color samples shown in the main product images were fired under the following conditions:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Body\u003c\/strong\u003e: Amakusa Pottery Stone (Porcelain)\u003cbr\u003e\u003cspan style=\"font-size: 0.85em; color: #666;\"\u003e(Composition: SiO2 72.04%, Al2O3 18.16%, Fe2O3 0.65%, TiO2 0.04%, CaO 0.49%, MgO 0.09%, Na2O 0.58%, K2O 3.00%, Ig.Loss 4.55%)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Temperature \u0026amp; Atmosphere\u003c\/strong\u003e: 1280°C (2336°F) \/ Reduction Firing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"color: #d32f2f; font-weight: bold; margin-top: 10px;\"\u003e*Note: The color of the underglaze will change depending on your clay body and whether you use oxidation or reduction firing. Please test in your own kiln.\u003c\/p\u003e\n\u003ch2\u003e[Frequently Asked Questions]\u003c\/h2\u003e\n\u003cdl\u003e\n\u003cdt style=\"font-weight: bold; margin-top: 15px;\"\u003eQ: How do I use the pigment?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: It arrives in a highly concentrated paste form. Please dilute it with water according to your purpose. For line drawing (outlining), a general guide is 1 part Gosu to 3 parts water. For Dami (washes), use 1 teaspoon of Gosu to 80ml-250ml of water. Please adjust to find your ideal shade.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: Should I add a binder or adhesive (like gum arabic or CMC)?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Our Gosu does not contain added binders to allow you flexibility. If the pigment is not adhering well to your bisque ware, or if your painting process requires touching the surface repeatedly, we recommend adding a small amount of your preferred binder.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: How should I store it if I won't use it for a long time?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: We recommend storing it tightly sealed in the container. If it dries out, simply add water and grind it again in a mortar to return it to a paste.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: What causes the pigment to crawl or repel during firing?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Applying the pigment too thickly is the most common cause of crawling. It can also be caused by dust or oil (from hands) on the bisque ware before painting.\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003ch2\u003e[Shipping \u0026amp; Postage (International)]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/ZGVsaXZlcnlfMWRheQ.png?cmsp_timestamp=20240605194647\" alt=\"Fast Shipping\"\u003e\u003cbr\u003eIf you place your order \u003cu\u003ebefore noon (JST)\u003c\/u\u003e, it will generally be shipped \u003cspan style=\"color: #d32f2f;\"\u003e\u003cstrong\u003e\u003cu\u003ethe next business day\u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e from our factory in Japan.\u003cbr\u003e\u003cem\u003e*If your order includes made-to-order items like specific glazes, the entire order will be shipped once all items are ready.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAbout Shipping Fees:\u003c\/strong\u003e\u003cbr\u003eShipping costs are \u003cstrong\u003eautomatically calculated at checkout\u003c\/strong\u003e based on the total weight of your order and your delivery address (Country\/Region).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAvailable Shipping Methods:\u003c\/strong\u003e\u003cbr\u003eDuring checkout, you can choose the delivery method that best suits your needs.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eEMS (Express Mail Service)\u003c\/strong\u003e: Fast and reliable with tracking, but shipping fees are higher. Typically arrives in 3 to 7 days depending on the destination.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSurface Mail (Sea Mail)\u003c\/strong\u003e: The most economical option with lower shipping fees, but delivery is slow. It typically takes 1 to 3 months to arrive.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003e*Please note that customs duties or import taxes may apply upon arrival in your country, which are the responsibility of the buyer.\u003c\/em\u003e\u003c\/p\u003e","brand":"株式会社深海商店","offers":[{"title":"Paste 100g","offer_id":49064664367395,"sku":"100100","price":2200.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0523\/0115\/files\/041__No1_EC-min.jpg?v=1770941322"},{"product_id":"166960006","title":"Sujitsuyo \/Dark Line underglaze(100g)","description":"\u003ch2\u003e[Quality \u0026amp; Craftsmanship]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"High quality Arita blue and white porcelain\" src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/Y2FwLTE0LW1pbg.jpg?cmsp_timestamp=20240605201618\"\u003e\u003cbr\u003eFor over half a century, blue and white porcelain (Sometsuke) and Somenishiki ware created using Fukaumi Shouten's Gosu (blue underglaze) have been beloved by royalty and aristocrats worldwide, and proudly exhibited in museums.\u003cbr\u003e\u003cbr\u003e\u003cstrong style=\"color: #005bd3;\"\u003eFeatured on the BBC and Japanese National Television\u003c\/strong\u003e\u003cbr\u003eOur profound history and traditional techniques caught the attention of the world when we were featured on the prestigious UK television series, \u003cstrong\u003eBBC's \u003cem\u003e\"Great Japanese Railway Journeys\"\u003c\/em\u003e\u003c\/strong\u003e.\u003cbr\u003eIn Japan, artists utilizing our Gosu have been featured on prominent programs such as \"Wafu Souhonke\" and NHK's \"Ippin,\" which highlight the nation's finest traditional craftsmanship.\u003cbr\u003e\u003cbr\u003eOur products are also trusted for official signage at research institutions and government agencies throughout Japan. We promise to deliver this world-recognized, authentic Arita Blue directly to your studio.\u003c\/p\u003e\n\u003ch2\u003e[The Manufacturing Process]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc\/DSC01766-min.jpg?cmsp_timestamp=20221222111934\" alt=\"Gosu production process with traditional stone mill\"\u003e\u003cbr\u003eTo maintain this exceptional quality, it takes more than a month from the start of production to completion for Fukaumi Shouten's Gosu.\u003cbr\u003e\u003cbr\u003eBy combining \u003cstrong\u003e\u003cu\u003eFukaumi Shouten's unique ingredient blend\u003c\/u\u003e\u003c\/strong\u003e, \u003cstrong\u003e\u003cu\u003eour proprietary firing technique (Calcination)\u003c\/u\u003e\u003c\/strong\u003e, and \u003cstrong\u003e\u003cu\u003ethe only stone-milling technology in Japan to micro-pulverize the grains\u003c\/u\u003e\u003c\/strong\u003e, we achieve the ultimate underglaze.\u003cbr\u003e\u003cbr\u003eThrough these rigorous processes, \u003cstrong\u003e\u003cu\u003ebrushstrokes become incredibly smooth, and the Gosu is highly resistant to burning out, even at high concentrations\u003c\/u\u003e\u003c\/strong\u003e.\u003cbr\u003e\u003cstrong\u003e\u003cu\u003eYou will not need to hand-grind the pigment yourself once it arrives; it is ready to use.\u003c\/u\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003eFukaumi Shouten is the only historic Gosu manufacturer that sells its products directly online to individuals worldwide. That is why we can offer authentic, professional-grade quality directly from our factory.\u003c\/p\u003e\n\u003cdiv class=\"youtube\" style=\"margin: 30px 0;\"\u003e\u003ciframe width=\"100%\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/1myOuT9yp4s?si=J6uVaUCtCXrHTky3\" title=\"Fukaumi Shouten Gosu Manufacturing Process\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003ch2\u003e[The History of Gosu in Arita]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0yNC1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Antique Arita ware showing traditional blue underglaze\"\u003e\u003cbr\u003eThe synthetic Gosu currently used throughout Japan was developed by the Fukaumi family during the early Meiji period (late 19th century).\u003cbr\u003e\u003cbr\u003eIn 1870, the renowned German chemist Gottfried Wagener was invited to Arita.\u003cbr\u003eDr. Wagener taught Heizaemon Fukaumi and his sons, Suminosuke and Takeji, the chemical method of producing the color blue using cobalt.\u003cbr\u003e\u003cbr\u003eFollowing this, the Fukaumi family conducted extensive research and successfully developed a scientific method for producing stable Gosu.\u003cbr\u003eAs a result, vivid and reliable synthetic Gosu began to be widely used in Arita and across Japan, establishing the world-famous \"Japan Blue\".\u003cbr\u003e\u003cbr\u003ePlease experience our premium Gosu, born from centuries of history, tradition, and the power of chemistry.\u003cbr\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0zNS1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Fukaumi Shouten Gosu powder and paste\" style=\"margin-top: 15px;\"\u003e\u003c\/p\u003e\n\u003ch2\u003e[How to Use]\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Type\u003c\/strong\u003e: Suitable for both Porcelain and Stoneware\/Earthenware.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Method\u003c\/strong\u003e: Suitable for both Oxidation and Reduction firing.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOptimal Firing Temperature\u003c\/strong\u003e: 1230°C – 1300°C (2246°F – 2372°F)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e[Firing Conditions for Sample Plates]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/MjAyNDAxR09TVV9zYW1wbGVzLW1pbg.jpg?cmsp_timestamp=20240605194159\" alt=\"Gosu color sample plates fired in reduction\"\u003e\u003cbr\u003eThe color samples shown in the main product images were fired under the following conditions:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Body\u003c\/strong\u003e: Amakusa Pottery Stone (Porcelain)\u003cbr\u003e\u003cspan style=\"font-size: 0.85em; color: #666;\"\u003e(Composition: SiO2 72.04%, Al2O3 18.16%, Fe2O3 0.65%, TiO2 0.04%, CaO 0.49%, MgO 0.09%, Na2O 0.58%, K2O 3.00%, Ig.Loss 4.55%)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Temperature \u0026amp; Atmosphere\u003c\/strong\u003e: 1280°C (2336°F) \/ Reduction Firing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"color: #d32f2f; font-weight: bold; margin-top: 10px;\"\u003e*Note: The color of the underglaze will change depending on your clay body and whether you use oxidation or reduction firing. Please test in your own kiln.\u003c\/p\u003e\n\u003ch2\u003e[Frequently Asked Questions]\u003c\/h2\u003e\n\u003cdl\u003e\n\u003cdt style=\"font-weight: bold; margin-top: 15px;\"\u003eQ: How do I use the pigment?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: It arrives in a highly concentrated paste form. Please dilute it with water according to your purpose. For line drawing (outlining), a general guide is 1 part Gosu to 3 parts water. For Dami (washes), use 1 teaspoon of Gosu to 80ml-250ml of water. Please adjust to find your ideal shade.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: Should I add a binder or adhesive (like gum arabic or CMC)?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Our Gosu does not contain added binders to allow you flexibility. If the pigment is not adhering well to your bisque ware, or if your painting process requires touching the surface repeatedly, we recommend adding a small amount of your preferred binder.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: How should I store it if I won't use it for a long time?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: We recommend storing it tightly sealed in the container. If it dries out, simply add water and grind it again in a mortar to return it to a paste.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: What causes the pigment to crawl or repel during firing?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Applying the pigment too thickly is the most common cause of crawling. It can also be caused by dust or oil (from hands) on the bisque ware before painting.\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003ch2\u003e[Shipping \u0026amp; Postage (International)]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/ZGVsaXZlcnlfMWRheQ.png?cmsp_timestamp=20240605194647\" alt=\"Fast Shipping\"\u003e\u003cbr\u003eIf you place your order \u003cu\u003ebefore noon (JST)\u003c\/u\u003e, it will generally be shipped \u003cspan style=\"color: #d32f2f;\"\u003e\u003cstrong\u003e\u003cu\u003ethe next business day\u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e from our factory in Japan.\u003cbr\u003e\u003cem\u003e*If your order includes made-to-order items like specific glazes, the entire order will be shipped once all items are ready.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAbout Shipping Fees:\u003c\/strong\u003e\u003cbr\u003eShipping costs are \u003cstrong\u003eautomatically calculated at checkout\u003c\/strong\u003e based on the total weight of your order and your delivery address (Country\/Region).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAvailable Shipping Methods:\u003c\/strong\u003e\u003cbr\u003eDuring checkout, you can choose the delivery method that best suits your needs.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eEMS (Express Mail Service)\u003c\/strong\u003e: Fast and reliable with tracking, but shipping fees are higher. Typically arrives in 3 to 7 days depending on the destination.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSurface Mail (Sea Mail)\u003c\/strong\u003e: The most economical option with lower shipping fees, but delivery is slow. It typically takes 1 to 3 months to arrive.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003e*Please note that customs duties or import taxes may apply upon arrival in your country, which are the responsibility of the buyer.\u003c\/em\u003e\u003c\/p\u003e","brand":"株式会社深海商店","offers":[{"title":"Paste 100g","offer_id":49064577859875,"sku":"100210","price":2600.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0523\/0115\/files\/038___EC-min.jpg?v=1723447762"},{"product_id":"166960222","title":"Kaiheki underglaze(100g)","description":"\u003ch2\u003e[Quality \u0026amp; Craftsmanship]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"High quality Arita blue and white porcelain\" src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/Y2FwLTE0LW1pbg.jpg?cmsp_timestamp=20240605201618\"\u003e\u003cbr\u003eFor over half a century, blue and white porcelain (Sometsuke) and Somenishiki ware created using Fukaumi Shouten's Gosu (blue underglaze) have been beloved by royalty and aristocrats worldwide, and proudly exhibited in museums.\u003cbr\u003e\u003cbr\u003e\u003cstrong style=\"color: #005bd3;\"\u003eFeatured on the BBC and Japanese National Television\u003c\/strong\u003e\u003cbr\u003eOur profound history and traditional techniques caught the attention of the world when we were featured on the prestigious UK television series, \u003cstrong\u003eBBC's \u003cem\u003e\"Great Japanese Railway Journeys\"\u003c\/em\u003e\u003c\/strong\u003e.\u003cbr\u003eIn Japan, artists utilizing our Gosu have been featured on prominent programs such as \"Wafu Souhonke\" and NHK's \"Ippin,\" which highlight the nation's finest traditional craftsmanship.\u003cbr\u003e\u003cbr\u003eOur products are also trusted for official signage at research institutions and government agencies throughout Japan. We promise to deliver this world-recognized, authentic Arita Blue directly to your studio.\u003c\/p\u003e\n\u003ch2\u003e[The Manufacturing Process]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc\/DSC01766-min.jpg?cmsp_timestamp=20221222111934\" alt=\"Gosu production process with traditional stone mill\"\u003e\u003cbr\u003eTo maintain this exceptional quality, it takes more than a month from the start of production to completion for Fukaumi Shouten's Gosu.\u003cbr\u003e\u003cbr\u003eBy combining \u003cstrong\u003e\u003cu\u003eFukaumi Shouten's unique ingredient blend\u003c\/u\u003e\u003c\/strong\u003e, \u003cstrong\u003e\u003cu\u003eour proprietary firing technique (Calcination)\u003c\/u\u003e\u003c\/strong\u003e, and \u003cstrong\u003e\u003cu\u003ethe only stone-milling technology in Japan to micro-pulverize the grains\u003c\/u\u003e\u003c\/strong\u003e, we achieve the ultimate underglaze.\u003cbr\u003e\u003cbr\u003eThrough these rigorous processes, \u003cstrong\u003e\u003cu\u003ebrushstrokes become incredibly smooth, and the Gosu is highly resistant to burning out, even at high concentrations\u003c\/u\u003e\u003c\/strong\u003e.\u003cbr\u003e\u003cstrong\u003e\u003cu\u003eYou will not need to hand-grind the pigment yourself once it arrives; it is ready to use.\u003c\/u\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003eFukaumi Shouten is the only historic Gosu manufacturer that sells its products directly online to individuals worldwide. That is why we can offer authentic, professional-grade quality directly from our factory.\u003c\/p\u003e\n\u003cdiv class=\"youtube\" style=\"margin: 30px 0;\"\u003e\u003ciframe width=\"100%\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/1myOuT9yp4s?si=J6uVaUCtCXrHTky3\" title=\"Fukaumi Shouten Gosu Manufacturing Process\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003ch2\u003e[The History of Gosu in Arita]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0yNC1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Antique Arita ware showing traditional blue underglaze\"\u003e\u003cbr\u003eThe synthetic Gosu currently used throughout Japan was developed by the Fukaumi family during the early Meiji period (late 19th century).\u003cbr\u003e\u003cbr\u003eIn 1870, the renowned German chemist Gottfried Wagener was invited to Arita.\u003cbr\u003eDr. Wagener taught Heizaemon Fukaumi and his sons, Suminosuke and Takeji, the chemical method of producing the color blue using cobalt.\u003cbr\u003e\u003cbr\u003eFollowing this, the Fukaumi family conducted extensive research and successfully developed a scientific method for producing stable Gosu.\u003cbr\u003eAs a result, vivid and reliable synthetic Gosu began to be widely used in Arita and across Japan, establishing the world-famous \"Japan Blue\".\u003cbr\u003e\u003cbr\u003ePlease experience our premium Gosu, born from centuries of history, tradition, and the power of chemistry.\u003cbr\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0zNS1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Fukaumi Shouten Gosu powder and paste\" style=\"margin-top: 15px;\"\u003e\u003c\/p\u003e\n\u003ch2\u003e[How to Use]\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Type\u003c\/strong\u003e: Suitable for both Porcelain and Stoneware\/Earthenware.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Method\u003c\/strong\u003e: Suitable for both Oxidation and Reduction firing.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOptimal Firing Temperature\u003c\/strong\u003e: 1230°C – 1300°C (2246°F – 2372°F)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e[Firing Conditions for Sample Plates]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/MjAyNDAxR09TVV9zYW1wbGVzLW1pbg.jpg?cmsp_timestamp=20240605194159\" alt=\"Gosu color sample plates fired in reduction\"\u003e\u003cbr\u003eThe color samples shown in the main product images were fired under the following conditions:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Body\u003c\/strong\u003e: Amakusa Pottery Stone (Porcelain)\u003cbr\u003e\u003cspan style=\"font-size: 0.85em; color: #666;\"\u003e(Composition: SiO2 72.04%, Al2O3 18.16%, Fe2O3 0.65%, TiO2 0.04%, CaO 0.49%, MgO 0.09%, Na2O 0.58%, K2O 3.00%, Ig.Loss 4.55%)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Temperature \u0026amp; Atmosphere\u003c\/strong\u003e: 1280°C (2336°F) \/ Reduction Firing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"color: #d32f2f; font-weight: bold; margin-top: 10px;\"\u003e*Note: The color of the underglaze will change depending on your clay body and whether you use oxidation or reduction firing. Please test in your own kiln.\u003c\/p\u003e\n\u003ch2\u003e[Frequently Asked Questions]\u003c\/h2\u003e\n\u003cdl\u003e\n\u003cdt style=\"font-weight: bold; margin-top: 15px;\"\u003eQ: How do I use the pigment?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: It arrives in a highly concentrated paste form. Please dilute it with water according to your purpose. For line drawing (outlining), a general guide is 1 part Gosu to 3 parts water. For Dami (washes), use 1 teaspoon of Gosu to 80ml-250ml of water. Please adjust to find your ideal shade.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: Should I add a binder or adhesive (like gum arabic or CMC)?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Our Gosu does not contain added binders to allow you flexibility. If the pigment is not adhering well to your bisque ware, or if your painting process requires touching the surface repeatedly, we recommend adding a small amount of your preferred binder.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: How should I store it if I won't use it for a long time?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: We recommend storing it tightly sealed in the container. If it dries out, simply add water and grind it again in a mortar to return it to a paste.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: What causes the pigment to crawl or repel during firing?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Applying the pigment too thickly is the most common cause of crawling. It can also be caused by dust or oil (from hands) on the bisque ware before painting.\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003ch2\u003e[Shipping \u0026amp; Postage (International)]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/ZGVsaXZlcnlfMWRheQ.png?cmsp_timestamp=20240605194647\" alt=\"Fast Shipping\"\u003e\u003cbr\u003eIf you place your order \u003cu\u003ebefore noon (JST)\u003c\/u\u003e, it will generally be shipped \u003cspan style=\"color: #d32f2f;\"\u003e\u003cstrong\u003e\u003cu\u003ethe next business day\u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e from our factory in Japan.\u003cbr\u003e\u003cem\u003e*If your order includes made-to-order items like specific glazes, the entire order will be shipped once all items are ready.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAbout Shipping Fees:\u003c\/strong\u003e\u003cbr\u003eShipping costs are \u003cstrong\u003eautomatically calculated at checkout\u003c\/strong\u003e based on the total weight of your order and your delivery address (Country\/Region).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAvailable Shipping Methods:\u003c\/strong\u003e\u003cbr\u003eDuring checkout, you can choose the delivery method that best suits your needs.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eEMS (Express Mail Service)\u003c\/strong\u003e: Fast and reliable with tracking, but shipping fees are higher. Typically arrives in 3 to 7 days depending on the destination.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSurface Mail (Sea Mail)\u003c\/strong\u003e: The most economical option with lower shipping fees, but delivery is slow. It typically takes 1 to 3 months to arrive.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003e*Please note that customs duties or import taxes may apply upon arrival in your country, which are the responsibility of the buyer.\u003c\/em\u003e\u003c\/p\u003e","brand":"株式会社深海商店","offers":[{"title":"Paste 100g","offer_id":49065230762275,"sku":"100580","price":2200.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0523\/0115\/files\/040___EC-min.jpg?v=1770941305"},{"product_id":"166960238","title":"Ancient 3 underglaze(100g)","description":"\u003ch2\u003e[Quality \u0026amp; Craftsmanship]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"High quality Arita blue and white porcelain\" src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/Y2FwLTE0LW1pbg.jpg?cmsp_timestamp=20240605201618\"\u003e\u003cbr\u003eFor over half a century, blue and white porcelain (Sometsuke) and Somenishiki ware created using Fukaumi Shouten's Gosu (blue underglaze) have been beloved by royalty and aristocrats worldwide, and proudly exhibited in museums.\u003cbr\u003e\u003cbr\u003e\u003cstrong style=\"color: #005bd3;\"\u003eFeatured on the BBC and Japanese National Television\u003c\/strong\u003e\u003cbr\u003eOur profound history and traditional techniques caught the attention of the world when we were featured on the prestigious UK television series, \u003cstrong\u003eBBC's \u003cem\u003e\"Great Japanese Railway Journeys\"\u003c\/em\u003e\u003c\/strong\u003e.\u003cbr\u003eIn Japan, artists utilizing our Gosu have been featured on prominent programs such as \"Wafu Souhonke\" and NHK's \"Ippin,\" which highlight the nation's finest traditional craftsmanship.\u003cbr\u003e\u003cbr\u003eOur products are also trusted for official signage at research institutions and government agencies throughout Japan. We promise to deliver this world-recognized, authentic Arita Blue directly to your studio.\u003c\/p\u003e\n\u003ch2\u003e[The Manufacturing Process]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc\/DSC01766-min.jpg?cmsp_timestamp=20221222111934\" alt=\"Gosu production process with traditional stone mill\"\u003e\u003cbr\u003eTo maintain this exceptional quality, it takes more than a month from the start of production to completion for Fukaumi Shouten's Gosu.\u003cbr\u003e\u003cbr\u003eBy combining \u003cstrong\u003e\u003cu\u003eFukaumi Shouten's unique ingredient blend\u003c\/u\u003e\u003c\/strong\u003e, \u003cstrong\u003e\u003cu\u003eour proprietary firing technique (Calcination)\u003c\/u\u003e\u003c\/strong\u003e, and \u003cstrong\u003e\u003cu\u003ethe only stone-milling technology in Japan to micro-pulverize the grains\u003c\/u\u003e\u003c\/strong\u003e, we achieve the ultimate underglaze.\u003cbr\u003e\u003cbr\u003eThrough these rigorous processes, \u003cstrong\u003e\u003cu\u003ebrushstrokes become incredibly smooth, and the Gosu is highly resistant to burning out, even at high concentrations\u003c\/u\u003e\u003c\/strong\u003e.\u003cbr\u003e\u003cstrong\u003e\u003cu\u003eYou will not need to hand-grind the pigment yourself once it arrives; it is ready to use.\u003c\/u\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003eFukaumi Shouten is the only historic Gosu manufacturer that sells its products directly online to individuals worldwide. That is why we can offer authentic, professional-grade quality directly from our factory.\u003c\/p\u003e\n\u003cdiv class=\"youtube\" style=\"margin: 30px 0;\"\u003e\u003ciframe width=\"100%\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/1myOuT9yp4s?si=J6uVaUCtCXrHTky3\" title=\"Fukaumi Shouten Gosu Manufacturing Process\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003ch2\u003e[The History of Gosu in Arita]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0yNC1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Antique Arita ware showing traditional blue underglaze\"\u003e\u003cbr\u003eThe synthetic Gosu currently used throughout Japan was developed by the Fukaumi family during the early Meiji period (late 19th century).\u003cbr\u003e\u003cbr\u003eIn 1870, the renowned German chemist Gottfried Wagener was invited to Arita.\u003cbr\u003eDr. Wagener taught Heizaemon Fukaumi and his sons, Suminosuke and Takeji, the chemical method of producing the color blue using cobalt.\u003cbr\u003e\u003cbr\u003eFollowing this, the Fukaumi family conducted extensive research and successfully developed a scientific method for producing stable Gosu.\u003cbr\u003eAs a result, vivid and reliable synthetic Gosu began to be widely used in Arita and across Japan, establishing the world-famous \"Japan Blue\".\u003cbr\u003e\u003cbr\u003ePlease experience our premium Gosu, born from centuries of history, tradition, and the power of chemistry.\u003cbr\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0zNS1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Fukaumi Shouten Gosu powder and paste\" style=\"margin-top: 15px;\"\u003e\u003c\/p\u003e\n\u003ch2\u003e[How to Use]\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Type\u003c\/strong\u003e: Suitable for both Porcelain and Stoneware\/Earthenware.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Method\u003c\/strong\u003e: Suitable for both Oxidation and Reduction firing.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOptimal Firing Temperature\u003c\/strong\u003e: 1230°C – 1300°C (2246°F – 2372°F)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e[Firing Conditions for Sample Plates]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/MjAyNDAxR09TVV9zYW1wbGVzLW1pbg.jpg?cmsp_timestamp=20240605194159\" alt=\"Gosu color sample plates fired in reduction\"\u003e\u003cbr\u003eThe color samples shown in the main product images were fired under the following conditions:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Body\u003c\/strong\u003e: Amakusa Pottery Stone (Porcelain)\u003cbr\u003e\u003cspan style=\"font-size: 0.85em; color: #666;\"\u003e(Composition: SiO2 72.04%, Al2O3 18.16%, Fe2O3 0.65%, TiO2 0.04%, CaO 0.49%, MgO 0.09%, Na2O 0.58%, K2O 3.00%, Ig.Loss 4.55%)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Temperature \u0026amp; Atmosphere\u003c\/strong\u003e: 1280°C (2336°F) \/ Reduction Firing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"color: #d32f2f; font-weight: bold; margin-top: 10px;\"\u003e*Note: The color of the underglaze will change depending on your clay body and whether you use oxidation or reduction firing. Please test in your own kiln.\u003c\/p\u003e\n\u003ch2\u003e[Frequently Asked Questions]\u003c\/h2\u003e\n\u003cdl\u003e\n\u003cdt style=\"font-weight: bold; margin-top: 15px;\"\u003eQ: How do I use the pigment?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: It arrives in a highly concentrated paste form. Please dilute it with water according to your purpose. For line drawing (outlining), a general guide is 1 part Gosu to 3 parts water. For Dami (washes), use 1 teaspoon of Gosu to 80ml-250ml of water. Please adjust to find your ideal shade.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: Should I add a binder or adhesive (like gum arabic or CMC)?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Our Gosu does not contain added binders to allow you flexibility. If the pigment is not adhering well to your bisque ware, or if your painting process requires touching the surface repeatedly, we recommend adding a small amount of your preferred binder.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: How should I store it if I won't use it for a long time?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: We recommend storing it tightly sealed in the container. If it dries out, simply add water and grind it again in a mortar to return it to a paste.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: What causes the pigment to crawl or repel during firing?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Applying the pigment too thickly is the most common cause of crawling. It can also be caused by dust or oil (from hands) on the bisque ware before painting.\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003ch2\u003e[Shipping \u0026amp; Postage (International)]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/ZGVsaXZlcnlfMWRheQ.png?cmsp_timestamp=20240605194647\" alt=\"Fast Shipping\"\u003e\u003cbr\u003eIf you place your order \u003cu\u003ebefore noon (JST)\u003c\/u\u003e, it will generally be shipped \u003cspan style=\"color: #d32f2f;\"\u003e\u003cstrong\u003e\u003cu\u003ethe next business day\u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e from our factory in Japan.\u003cbr\u003e\u003cem\u003e*If your order includes made-to-order items like specific glazes, the entire order will be shipped once all items are ready.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAbout Shipping Fees:\u003c\/strong\u003e\u003cbr\u003eShipping costs are \u003cstrong\u003eautomatically calculated at checkout\u003c\/strong\u003e based on the total weight of your order and your delivery address (Country\/Region).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAvailable Shipping Methods:\u003c\/strong\u003e\u003cbr\u003eDuring checkout, you can choose the delivery method that best suits your needs.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eEMS (Express Mail Service)\u003c\/strong\u003e: Fast and reliable with tracking, but shipping fees are higher. Typically arrives in 3 to 7 days depending on the destination.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSurface Mail (Sea Mail)\u003c\/strong\u003e: The most economical option with lower shipping fees, but delivery is slow. It typically takes 1 to 3 months to arrive.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003e*Please note that customs duties or import taxes may apply upon arrival in your country, which are the responsibility of the buyer.\u003c\/em\u003e\u003c\/p\u003e","brand":"株式会社深海商店","offers":[{"title":"Paste 100g","offer_id":49065043198243,"sku":"100020","price":2100.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0523\/0115\/files\/026___EC-min.jpg?v=1770941288"},{"product_id":"166961009","title":"Ancient 5 \/Ancient 5 underglaze(100g)","description":"\u003ch2\u003e[Quality \u0026amp; Craftsmanship]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"High quality Arita blue and white porcelain\" src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/Y2FwLTE0LW1pbg.jpg?cmsp_timestamp=20240605201618\"\u003e\u003cbr\u003eFor over half a century, blue and white porcelain (Sometsuke) and Somenishiki ware created using Fukaumi Shouten's Gosu (blue underglaze) have been beloved by royalty and aristocrats worldwide, and proudly exhibited in museums.\u003cbr\u003e\u003cbr\u003e\u003cstrong style=\"color: #005bd3;\"\u003eFeatured on the BBC and Japanese National Television\u003c\/strong\u003e\u003cbr\u003eOur profound history and traditional techniques caught the attention of the world when we were featured on the prestigious UK television series, \u003cstrong\u003eBBC's \u003cem\u003e\"Great Japanese Railway Journeys\"\u003c\/em\u003e\u003c\/strong\u003e.\u003cbr\u003eIn Japan, artists utilizing our Gosu have been featured on prominent programs such as \"Wafu Souhonke\" and NHK's \"Ippin,\" which highlight the nation's finest traditional craftsmanship.\u003cbr\u003e\u003cbr\u003eOur products are also trusted for official signage at research institutions and government agencies throughout Japan. We promise to deliver this world-recognized, authentic Arita Blue directly to your studio.\u003c\/p\u003e\n\u003ch2\u003e[The Manufacturing Process]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc\/DSC01766-min.jpg?cmsp_timestamp=20221222111934\" alt=\"Gosu production process with traditional stone mill\"\u003e\u003cbr\u003eTo maintain this exceptional quality, it takes more than a month from the start of production to completion for Fukaumi Shouten's Gosu.\u003cbr\u003e\u003cbr\u003eBy combining \u003cstrong\u003e\u003cu\u003eFukaumi Shouten's unique ingredient blend\u003c\/u\u003e\u003c\/strong\u003e, \u003cstrong\u003e\u003cu\u003eour proprietary firing technique (Calcination)\u003c\/u\u003e\u003c\/strong\u003e, and \u003cstrong\u003e\u003cu\u003ethe only stone-milling technology in Japan to micro-pulverize the grains\u003c\/u\u003e\u003c\/strong\u003e, we achieve the ultimate underglaze.\u003cbr\u003e\u003cbr\u003eThrough these rigorous processes, \u003cstrong\u003e\u003cu\u003ebrushstrokes become incredibly smooth, and the Gosu is highly resistant to burning out, even at high concentrations\u003c\/u\u003e\u003c\/strong\u003e.\u003cbr\u003e\u003cstrong\u003e\u003cu\u003eYou will not need to hand-grind the pigment yourself once it arrives; it is ready to use.\u003c\/u\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003eFukaumi Shouten is the only historic Gosu manufacturer that sells its products directly online to individuals worldwide. That is why we can offer authentic, professional-grade quality directly from our factory.\u003c\/p\u003e\n\u003cdiv class=\"youtube\" style=\"margin: 30px 0;\"\u003e\u003ciframe width=\"100%\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/1myOuT9yp4s?si=J6uVaUCtCXrHTky3\" title=\"Fukaumi Shouten Gosu Manufacturing Process\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003ch2\u003e[The History of Gosu in Arita]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0yNC1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Antique Arita ware showing traditional blue underglaze\"\u003e\u003cbr\u003eThe synthetic Gosu currently used throughout Japan was developed by the Fukaumi family during the early Meiji period (late 19th century).\u003cbr\u003e\u003cbr\u003eIn 1870, the renowned German chemist Gottfried Wagener was invited to Arita.\u003cbr\u003eDr. Wagener taught Heizaemon Fukaumi and his sons, Suminosuke and Takeji, the chemical method of producing the color blue using cobalt.\u003cbr\u003e\u003cbr\u003eFollowing this, the Fukaumi family conducted extensive research and successfully developed a scientific method for producing stable Gosu.\u003cbr\u003eAs a result, vivid and reliable synthetic Gosu began to be widely used in Arita and across Japan, establishing the world-famous \"Japan Blue\".\u003cbr\u003e\u003cbr\u003ePlease experience our premium Gosu, born from centuries of history, tradition, and the power of chemistry.\u003cbr\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0zNS1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Fukaumi Shouten Gosu powder and paste\" style=\"margin-top: 15px;\"\u003e\u003c\/p\u003e\n\u003ch2\u003e[How to Use]\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Type\u003c\/strong\u003e: Suitable for both Porcelain and Stoneware\/Earthenware.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Method\u003c\/strong\u003e: Suitable for both Oxidation and Reduction firing.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOptimal Firing Temperature\u003c\/strong\u003e: 1230°C – 1300°C (2246°F – 2372°F)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e[Firing Conditions for Sample Plates]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/MjAyNDAxR09TVV9zYW1wbGVzLW1pbg.jpg?cmsp_timestamp=20240605194159\" alt=\"Gosu color sample plates fired in reduction\"\u003e\u003cbr\u003eThe color samples shown in the main product images were fired under the following conditions:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Body\u003c\/strong\u003e: Amakusa Pottery Stone (Porcelain)\u003cbr\u003e\u003cspan style=\"font-size: 0.85em; color: #666;\"\u003e(Composition: SiO2 72.04%, Al2O3 18.16%, Fe2O3 0.65%, TiO2 0.04%, CaO 0.49%, MgO 0.09%, Na2O 0.58%, K2O 3.00%, Ig.Loss 4.55%)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Temperature \u0026amp; Atmosphere\u003c\/strong\u003e: 1280°C (2336°F) \/ Reduction Firing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"color: #d32f2f; font-weight: bold; margin-top: 10px;\"\u003e*Note: The color of the underglaze will change depending on your clay body and whether you use oxidation or reduction firing. Please test in your own kiln.\u003c\/p\u003e\n\u003ch2\u003e[Frequently Asked Questions]\u003c\/h2\u003e\n\u003cdl\u003e\n\u003cdt style=\"font-weight: bold; margin-top: 15px;\"\u003eQ: How do I use the pigment?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: It arrives in a highly concentrated paste form. Please dilute it with water according to your purpose. For line drawing (outlining), a general guide is 1 part Gosu to 3 parts water. For Dami (washes), use 1 teaspoon of Gosu to 80ml-250ml of water. Please adjust to find your ideal shade.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: Should I add a binder or adhesive (like gum arabic or CMC)?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Our Gosu does not contain added binders to allow you flexibility. If the pigment is not adhering well to your bisque ware, or if your painting process requires touching the surface repeatedly, we recommend adding a small amount of your preferred binder.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: How should I store it if I won't use it for a long time?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: We recommend storing it tightly sealed in the container. If it dries out, simply add water and grind it again in a mortar to return it to a paste.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: What causes the pigment to crawl or repel during firing?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Applying the pigment too thickly is the most common cause of crawling. It can also be caused by dust or oil (from hands) on the bisque ware before painting.\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003ch2\u003e[Shipping \u0026amp; Postage (International)]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/ZGVsaXZlcnlfMWRheQ.png?cmsp_timestamp=20240605194647\" alt=\"Fast Shipping\"\u003e\u003cbr\u003eIf you place your order \u003cu\u003ebefore noon (JST)\u003c\/u\u003e, it will generally be shipped \u003cspan style=\"color: #d32f2f;\"\u003e\u003cstrong\u003e\u003cu\u003ethe next business day\u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e from our factory in Japan.\u003cbr\u003e\u003cem\u003e*If your order includes made-to-order items like specific glazes, the entire order will be shipped once all items are ready.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAbout Shipping Fees:\u003c\/strong\u003e\u003cbr\u003eShipping costs are \u003cstrong\u003eautomatically calculated at checkout\u003c\/strong\u003e based on the total weight of your order and your delivery address (Country\/Region).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAvailable Shipping Methods:\u003c\/strong\u003e\u003cbr\u003eDuring checkout, you can choose the delivery method that best suits your needs.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eEMS (Express Mail Service)\u003c\/strong\u003e: Fast and reliable with tracking, but shipping fees are higher. Typically arrives in 3 to 7 days depending on the destination.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSurface Mail (Sea Mail)\u003c\/strong\u003e: The most economical option with lower shipping fees, but delivery is slow. It typically takes 1 to 3 months to arrive.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003e*Please note that customs duties or import taxes may apply upon arrival in your country, which are the responsibility of the buyer.\u003c\/em\u003e\u003c\/p\u003e","brand":"株式会社深海商店","offers":[{"title":"Paste 100g","offer_id":49065069707555,"sku":"100040","price":2100.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0523\/0115\/files\/021___EC-min.jpg?v=1770941270"},{"product_id":"166961157","title":"Ancient 3 No.3 \/Ancient 3 No.3 underglaze(100g)","description":"\u003ch2\u003e[Quality \u0026amp; Craftsmanship]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"High quality Arita blue and white porcelain\" src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/Y2FwLTE0LW1pbg.jpg?cmsp_timestamp=20240605201618\"\u003e\u003cbr\u003eFor over half a century, blue and white porcelain (Sometsuke) and Somenishiki ware created using Fukaumi Shouten's Gosu (blue underglaze) have been beloved by royalty and aristocrats worldwide, and proudly exhibited in museums.\u003cbr\u003e\u003cbr\u003e\u003cstrong style=\"color: #005bd3;\"\u003eFeatured on the BBC and Japanese National Television\u003c\/strong\u003e\u003cbr\u003eOur profound history and traditional techniques caught the attention of the world when we were featured on the prestigious UK television series, \u003cstrong\u003eBBC's \u003cem\u003e\"Great Japanese Railway Journeys\"\u003c\/em\u003e\u003c\/strong\u003e.\u003cbr\u003eIn Japan, artists utilizing our Gosu have been featured on prominent programs such as \"Wafu Souhonke\" and NHK's \"Ippin,\" which highlight the nation's finest traditional craftsmanship.\u003cbr\u003e\u003cbr\u003eOur products are also trusted for official signage at research institutions and government agencies throughout Japan. We promise to deliver this world-recognized, authentic Arita Blue directly to your studio.\u003c\/p\u003e\n\u003ch2\u003e[The Manufacturing Process]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc\/DSC01766-min.jpg?cmsp_timestamp=20221222111934\" alt=\"Gosu production process with traditional stone mill\"\u003e\u003cbr\u003eTo maintain this exceptional quality, it takes more than a month from the start of production to completion for Fukaumi Shouten's Gosu.\u003cbr\u003e\u003cbr\u003eBy combining \u003cstrong\u003e\u003cu\u003eFukaumi Shouten's unique ingredient blend\u003c\/u\u003e\u003c\/strong\u003e, \u003cstrong\u003e\u003cu\u003eour proprietary firing technique (Calcination)\u003c\/u\u003e\u003c\/strong\u003e, and \u003cstrong\u003e\u003cu\u003ethe only stone-milling technology in Japan to micro-pulverize the grains\u003c\/u\u003e\u003c\/strong\u003e, we achieve the ultimate underglaze.\u003cbr\u003e\u003cbr\u003eThrough these rigorous processes, \u003cstrong\u003e\u003cu\u003ebrushstrokes become incredibly smooth, and the Gosu is highly resistant to burning out, even at high concentrations\u003c\/u\u003e\u003c\/strong\u003e.\u003cbr\u003e\u003cstrong\u003e\u003cu\u003eYou will not need to hand-grind the pigment yourself once it arrives; it is ready to use.\u003c\/u\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003eFukaumi Shouten is the only historic Gosu manufacturer that sells its products directly online to individuals worldwide. That is why we can offer authentic, professional-grade quality directly from our factory.\u003c\/p\u003e\n\u003cdiv class=\"youtube\" style=\"margin: 30px 0;\"\u003e\u003ciframe width=\"100%\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/1myOuT9yp4s?si=J6uVaUCtCXrHTky3\" title=\"Fukaumi Shouten Gosu Manufacturing Process\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003ch2\u003e[The History of Gosu in Arita]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0yNC1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Antique Arita ware showing traditional blue underglaze\"\u003e\u003cbr\u003eThe synthetic Gosu currently used throughout Japan was developed by the Fukaumi family during the early Meiji period (late 19th century).\u003cbr\u003e\u003cbr\u003eIn 1870, the renowned German chemist Gottfried Wagener was invited to Arita.\u003cbr\u003eDr. Wagener taught Heizaemon Fukaumi and his sons, Suminosuke and Takeji, the chemical method of producing the color blue using cobalt.\u003cbr\u003e\u003cbr\u003eFollowing this, the Fukaumi family conducted extensive research and successfully developed a scientific method for producing stable Gosu.\u003cbr\u003eAs a result, vivid and reliable synthetic Gosu began to be widely used in Arita and across Japan, establishing the world-famous \"Japan Blue\".\u003cbr\u003e\u003cbr\u003ePlease experience our premium Gosu, born from centuries of history, tradition, and the power of chemistry.\u003cbr\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0zNS1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Fukaumi Shouten Gosu powder and paste\" style=\"margin-top: 15px;\"\u003e\u003c\/p\u003e\n\u003ch2\u003e[How to Use]\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Type\u003c\/strong\u003e: Suitable for both Porcelain and Stoneware\/Earthenware.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Method\u003c\/strong\u003e: Suitable for both Oxidation and Reduction firing.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOptimal Firing Temperature\u003c\/strong\u003e: 1230°C – 1300°C (2246°F – 2372°F)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e[Firing Conditions for Sample Plates]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/MjAyNDAxR09TVV9zYW1wbGVzLW1pbg.jpg?cmsp_timestamp=20240605194159\" alt=\"Gosu color sample plates fired in reduction\"\u003e\u003cbr\u003eThe color samples shown in the main product images were fired under the following conditions:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Body\u003c\/strong\u003e: Amakusa Pottery Stone (Porcelain)\u003cbr\u003e\u003cspan style=\"font-size: 0.85em; color: #666;\"\u003e(Composition: SiO2 72.04%, Al2O3 18.16%, Fe2O3 0.65%, TiO2 0.04%, CaO 0.49%, MgO 0.09%, Na2O 0.58%, K2O 3.00%, Ig.Loss 4.55%)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Temperature \u0026amp; Atmosphere\u003c\/strong\u003e: 1280°C (2336°F) \/ Reduction Firing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"color: #d32f2f; font-weight: bold; margin-top: 10px;\"\u003e*Note: The color of the underglaze will change depending on your clay body and whether you use oxidation or reduction firing. Please test in your own kiln.\u003c\/p\u003e\n\u003ch2\u003e[Frequently Asked Questions]\u003c\/h2\u003e\n\u003cdl\u003e\n\u003cdt style=\"font-weight: bold; margin-top: 15px;\"\u003eQ: How do I use the pigment?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: It arrives in a highly concentrated paste form. Please dilute it with water according to your purpose. For line drawing (outlining), a general guide is 1 part Gosu to 3 parts water. For Dami (washes), use 1 teaspoon of Gosu to 80ml-250ml of water. Please adjust to find your ideal shade.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: Should I add a binder or adhesive (like gum arabic or CMC)?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Our Gosu does not contain added binders to allow you flexibility. If the pigment is not adhering well to your bisque ware, or if your painting process requires touching the surface repeatedly, we recommend adding a small amount of your preferred binder.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: How should I store it if I won't use it for a long time?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: We recommend storing it tightly sealed in the container. If it dries out, simply add water and grind it again in a mortar to return it to a paste.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: What causes the pigment to crawl or repel during firing?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Applying the pigment too thickly is the most common cause of crawling. It can also be caused by dust or oil (from hands) on the bisque ware before painting.\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003ch2\u003e[Shipping \u0026amp; Postage (International)]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/ZGVsaXZlcnlfMWRheQ.png?cmsp_timestamp=20240605194647\" alt=\"Fast Shipping\"\u003e\u003cbr\u003eIf you place your order \u003cu\u003ebefore noon (JST)\u003c\/u\u003e, it will generally be shipped \u003cspan style=\"color: #d32f2f;\"\u003e\u003cstrong\u003e\u003cu\u003ethe next business day\u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e from our factory in Japan.\u003cbr\u003e\u003cem\u003e*If your order includes made-to-order items like specific glazes, the entire order will be shipped once all items are ready.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAbout Shipping Fees:\u003c\/strong\u003e\u003cbr\u003eShipping costs are \u003cstrong\u003eautomatically calculated at checkout\u003c\/strong\u003e based on the total weight of your order and your delivery address (Country\/Region).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAvailable Shipping Methods:\u003c\/strong\u003e\u003cbr\u003eDuring checkout, you can choose the delivery method that best suits your needs.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eEMS (Express Mail Service)\u003c\/strong\u003e: Fast and reliable with tracking, but shipping fees are higher. Typically arrives in 3 to 7 days depending on the destination.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSurface Mail (Sea Mail)\u003c\/strong\u003e: The most economical option with lower shipping fees, but delivery is slow. It typically takes 1 to 3 months to arrive.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003e*Please note that customs duties or import taxes may apply upon arrival in your country, which are the responsibility of the buyer.\u003c\/em\u003e\u003c\/p\u003e","brand":"株式会社深海商店","offers":[{"title":"Paste 100g","offer_id":49065058173219,"sku":"100550","price":2100.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0523\/0115\/files\/024__No3_EC-min.jpg?v=1770941254"},{"product_id":"166961436","title":"Special Ancient Gosu 4 No.2 underglaze(100g)","description":"\u003ch2\u003e[Quality \u0026amp; Craftsmanship]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"High quality Arita blue and white porcelain\" src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/Y2FwLTE0LW1pbg.jpg?cmsp_timestamp=20240605201618\"\u003e\u003cbr\u003eFor over half a century, blue and white porcelain (Sometsuke) and Somenishiki ware created using Fukaumi Shouten's Gosu (blue underglaze) have been beloved by royalty and aristocrats worldwide, and proudly exhibited in museums.\u003cbr\u003e\u003cbr\u003e\u003cstrong style=\"color: #005bd3;\"\u003eFeatured on the BBC and Japanese National Television\u003c\/strong\u003e\u003cbr\u003eOur profound history and traditional techniques caught the attention of the world when we were featured on the prestigious UK television series, \u003cstrong\u003eBBC's \u003cem\u003e\"Great Japanese Railway Journeys\"\u003c\/em\u003e\u003c\/strong\u003e.\u003cbr\u003eIn Japan, artists utilizing our Gosu have been featured on prominent programs such as \"Wafu Souhonke\" and NHK's \"Ippin,\" which highlight the nation's finest traditional craftsmanship.\u003cbr\u003e\u003cbr\u003eOur products are also trusted for official signage at research institutions and government agencies throughout Japan. We promise to deliver this world-recognized, authentic Arita Blue directly to your studio.\u003c\/p\u003e\n\u003ch2\u003e[The Manufacturing Process]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc\/DSC01766-min.jpg?cmsp_timestamp=20221222111934\" alt=\"Gosu production process with traditional stone mill\"\u003e\u003cbr\u003eTo maintain this exceptional quality, it takes more than a month from the start of production to completion for Fukaumi Shouten's Gosu.\u003cbr\u003e\u003cbr\u003eBy combining \u003cstrong\u003e\u003cu\u003eFukaumi Shouten's unique ingredient blend\u003c\/u\u003e\u003c\/strong\u003e, \u003cstrong\u003e\u003cu\u003eour proprietary firing technique (Calcination)\u003c\/u\u003e\u003c\/strong\u003e, and \u003cstrong\u003e\u003cu\u003ethe only stone-milling technology in Japan to micro-pulverize the grains\u003c\/u\u003e\u003c\/strong\u003e, we achieve the ultimate underglaze.\u003cbr\u003e\u003cbr\u003eThrough these rigorous processes, \u003cstrong\u003e\u003cu\u003ebrushstrokes become incredibly smooth, and the Gosu is highly resistant to burning out, even at high concentrations\u003c\/u\u003e\u003c\/strong\u003e.\u003cbr\u003e\u003cstrong\u003e\u003cu\u003eYou will not need to hand-grind the pigment yourself once it arrives; it is ready to use.\u003c\/u\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003eFukaumi Shouten is the only historic Gosu manufacturer that sells its products directly online to individuals worldwide. That is why we can offer authentic, professional-grade quality directly from our factory.\u003c\/p\u003e\n\u003cdiv class=\"youtube\" style=\"margin: 30px 0;\"\u003e\u003ciframe width=\"100%\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/1myOuT9yp4s?si=J6uVaUCtCXrHTky3\" title=\"Fukaumi Shouten Gosu Manufacturing Process\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003ch2\u003e[The History of Gosu in Arita]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0yNC1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Antique Arita ware showing traditional blue underglaze\"\u003e\u003cbr\u003eThe synthetic Gosu currently used throughout Japan was developed by the Fukaumi family during the early Meiji period (late 19th century).\u003cbr\u003e\u003cbr\u003eIn 1870, the renowned German chemist Gottfried Wagener was invited to Arita.\u003cbr\u003eDr. Wagener taught Heizaemon Fukaumi and his sons, Suminosuke and Takeji, the chemical method of producing the color blue using cobalt.\u003cbr\u003e\u003cbr\u003eFollowing this, the Fukaumi family conducted extensive research and successfully developed a scientific method for producing stable Gosu.\u003cbr\u003eAs a result, vivid and reliable synthetic Gosu began to be widely used in Arita and across Japan, establishing the world-famous \"Japan Blue\".\u003cbr\u003e\u003cbr\u003ePlease experience our premium Gosu, born from centuries of history, tradition, and the power of chemistry.\u003cbr\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0zNS1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Fukaumi Shouten Gosu powder and paste\" style=\"margin-top: 15px;\"\u003e\u003c\/p\u003e\n\u003ch2\u003e[How to Use]\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Type\u003c\/strong\u003e: Suitable for both Porcelain and Stoneware\/Earthenware.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Method\u003c\/strong\u003e: Suitable for both Oxidation and Reduction firing.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOptimal Firing Temperature\u003c\/strong\u003e: 1230°C – 1300°C (2246°F – 2372°F)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e[Firing Conditions for Sample Plates]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/MjAyNDAxR09TVV9zYW1wbGVzLW1pbg.jpg?cmsp_timestamp=20240605194159\" alt=\"Gosu color sample plates fired in reduction\"\u003e\u003cbr\u003eThe color samples shown in the main product images were fired under the following conditions:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Body\u003c\/strong\u003e: Amakusa Pottery Stone (Porcelain)\u003cbr\u003e\u003cspan style=\"font-size: 0.85em; color: #666;\"\u003e(Composition: SiO2 72.04%, Al2O3 18.16%, Fe2O3 0.65%, TiO2 0.04%, CaO 0.49%, MgO 0.09%, Na2O 0.58%, K2O 3.00%, Ig.Loss 4.55%)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Temperature \u0026amp; Atmosphere\u003c\/strong\u003e: 1280°C (2336°F) \/ Reduction Firing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"color: #d32f2f; font-weight: bold; margin-top: 10px;\"\u003e*Note: The color of the underglaze will change depending on your clay body and whether you use oxidation or reduction firing. Please test in your own kiln.\u003c\/p\u003e\n\u003ch2\u003e[Frequently Asked Questions]\u003c\/h2\u003e\n\u003cdl\u003e\n\u003cdt style=\"font-weight: bold; margin-top: 15px;\"\u003eQ: How do I use the pigment?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: It arrives in a highly concentrated paste form. Please dilute it with water according to your purpose. For line drawing (outlining), a general guide is 1 part Gosu to 3 parts water. For Dami (washes), use 1 teaspoon of Gosu to 80ml-250ml of water. Please adjust to find your ideal shade.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: Should I add a binder or adhesive (like gum arabic or CMC)?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Our Gosu does not contain added binders to allow you flexibility. If the pigment is not adhering well to your bisque ware, or if your painting process requires touching the surface repeatedly, we recommend adding a small amount of your preferred binder.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: How should I store it if I won't use it for a long time?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: We recommend storing it tightly sealed in the container. If it dries out, simply add water and grind it again in a mortar to return it to a paste.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: What causes the pigment to crawl or repel during firing?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Applying the pigment too thickly is the most common cause of crawling. It can also be caused by dust or oil (from hands) on the bisque ware before painting.\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003ch2\u003e[Shipping \u0026amp; Postage (International)]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/ZGVsaXZlcnlfMWRheQ.png?cmsp_timestamp=20240605194647\" alt=\"Fast Shipping\"\u003e\u003cbr\u003eIf you place your order \u003cu\u003ebefore noon (JST)\u003c\/u\u003e, it will generally be shipped \u003cspan style=\"color: #d32f2f;\"\u003e\u003cstrong\u003e\u003cu\u003ethe next business day\u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e from our factory in Japan.\u003cbr\u003e\u003cem\u003e*If your order includes made-to-order items like specific glazes, the entire order will be shipped once all items are ready.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAbout Shipping Fees:\u003c\/strong\u003e\u003cbr\u003eShipping costs are \u003cstrong\u003eautomatically calculated at checkout\u003c\/strong\u003e based on the total weight of your order and your delivery address (Country\/Region).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAvailable Shipping Methods:\u003c\/strong\u003e\u003cbr\u003eDuring checkout, you can choose the delivery method that best suits your needs.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eEMS (Express Mail Service)\u003c\/strong\u003e: Fast and reliable with tracking, but shipping fees are higher. Typically arrives in 3 to 7 days depending on the destination.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSurface Mail (Sea Mail)\u003c\/strong\u003e: The most economical option with lower shipping fees, but delivery is slow. It typically takes 1 to 3 months to arrive.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003e*Please note that customs duties or import taxes may apply upon arrival in your country, which are the responsibility of the buyer.\u003c\/em\u003e\u003c\/p\u003e","brand":"株式会社深海商店","offers":[{"title":"Paste 100g","offer_id":49065252094243,"sku":"100182","price":2300.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0523\/0115\/files\/019__No2_EC-min.jpg?v=1770941239"},{"product_id":"166961485","title":"Ancient 3 No.6 \/Ancient 3 No.6 underglaze(100g)","description":"\u003ch2\u003e[Quality \u0026amp; Craftsmanship]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"High quality Arita blue and white porcelain\" src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/Y2FwLTE0LW1pbg.jpg?cmsp_timestamp=20240605201618\"\u003e\u003cbr\u003eFor over half a century, blue and white porcelain (Sometsuke) and Somenishiki ware created using Fukaumi Shouten's Gosu (blue underglaze) have been beloved by royalty and aristocrats worldwide, and proudly exhibited in museums.\u003cbr\u003e\u003cbr\u003e\u003cstrong style=\"color: #005bd3;\"\u003eFeatured on the BBC and Japanese National Television\u003c\/strong\u003e\u003cbr\u003eOur profound history and traditional techniques caught the attention of the world when we were featured on the prestigious UK television series, \u003cstrong\u003eBBC's \u003cem\u003e\"Great Japanese Railway Journeys\"\u003c\/em\u003e\u003c\/strong\u003e.\u003cbr\u003eIn Japan, artists utilizing our Gosu have been featured on prominent programs such as \"Wafu Souhonke\" and NHK's \"Ippin,\" which highlight the nation's finest traditional craftsmanship.\u003cbr\u003e\u003cbr\u003eOur products are also trusted for official signage at research institutions and government agencies throughout Japan. We promise to deliver this world-recognized, authentic Arita Blue directly to your studio.\u003c\/p\u003e\n\u003ch2\u003e[The Manufacturing Process]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc\/DSC01766-min.jpg?cmsp_timestamp=20221222111934\" alt=\"Gosu production process with traditional stone mill\"\u003e\u003cbr\u003eTo maintain this exceptional quality, it takes more than a month from the start of production to completion for Fukaumi Shouten's Gosu.\u003cbr\u003e\u003cbr\u003eBy combining \u003cstrong\u003e\u003cu\u003eFukaumi Shouten's unique ingredient blend\u003c\/u\u003e\u003c\/strong\u003e, \u003cstrong\u003e\u003cu\u003eour proprietary firing technique (Calcination)\u003c\/u\u003e\u003c\/strong\u003e, and \u003cstrong\u003e\u003cu\u003ethe only stone-milling technology in Japan to micro-pulverize the grains\u003c\/u\u003e\u003c\/strong\u003e, we achieve the ultimate underglaze.\u003cbr\u003e\u003cbr\u003eThrough these rigorous processes, \u003cstrong\u003e\u003cu\u003ebrushstrokes become incredibly smooth, and the Gosu is highly resistant to burning out, even at high concentrations\u003c\/u\u003e\u003c\/strong\u003e.\u003cbr\u003e\u003cstrong\u003e\u003cu\u003eYou will not need to hand-grind the pigment yourself once it arrives; it is ready to use.\u003c\/u\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003eFukaumi Shouten is the only historic Gosu manufacturer that sells its products directly online to individuals worldwide. That is why we can offer authentic, professional-grade quality directly from our factory.\u003c\/p\u003e\n\u003cdiv class=\"youtube\" style=\"margin: 30px 0;\"\u003e\u003ciframe width=\"100%\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/1myOuT9yp4s?si=J6uVaUCtCXrHTky3\" title=\"Fukaumi Shouten Gosu Manufacturing Process\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003ch2\u003e[The History of Gosu in Arita]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0yNC1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Antique Arita ware showing traditional blue underglaze\"\u003e\u003cbr\u003eThe synthetic Gosu currently used throughout Japan was developed by the Fukaumi family during the early Meiji period (late 19th century).\u003cbr\u003e\u003cbr\u003eIn 1870, the renowned German chemist Gottfried Wagener was invited to Arita.\u003cbr\u003eDr. Wagener taught Heizaemon Fukaumi and his sons, Suminosuke and Takeji, the chemical method of producing the color blue using cobalt.\u003cbr\u003e\u003cbr\u003eFollowing this, the Fukaumi family conducted extensive research and successfully developed a scientific method for producing stable Gosu.\u003cbr\u003eAs a result, vivid and reliable synthetic Gosu began to be widely used in Arita and across Japan, establishing the world-famous \"Japan Blue\".\u003cbr\u003e\u003cbr\u003ePlease experience our premium Gosu, born from centuries of history, tradition, and the power of chemistry.\u003cbr\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0zNS1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Fukaumi Shouten Gosu powder and paste\" style=\"margin-top: 15px;\"\u003e\u003c\/p\u003e\n\u003ch2\u003e[How to Use]\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Type\u003c\/strong\u003e: Suitable for both Porcelain and Stoneware\/Earthenware.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Method\u003c\/strong\u003e: Suitable for both Oxidation and Reduction firing.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOptimal Firing Temperature\u003c\/strong\u003e: 1230°C – 1300°C (2246°F – 2372°F)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e[Firing Conditions for Sample Plates]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/MjAyNDAxR09TVV9zYW1wbGVzLW1pbg.jpg?cmsp_timestamp=20240605194159\" alt=\"Gosu color sample plates fired in reduction\"\u003e\u003cbr\u003eThe color samples shown in the main product images were fired under the following conditions:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Body\u003c\/strong\u003e: Amakusa Pottery Stone (Porcelain)\u003cbr\u003e\u003cspan style=\"font-size: 0.85em; color: #666;\"\u003e(Composition: SiO2 72.04%, Al2O3 18.16%, Fe2O3 0.65%, TiO2 0.04%, CaO 0.49%, MgO 0.09%, Na2O 0.58%, K2O 3.00%, Ig.Loss 4.55%)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Temperature \u0026amp; Atmosphere\u003c\/strong\u003e: 1280°C (2336°F) \/ Reduction Firing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"color: #d32f2f; font-weight: bold; margin-top: 10px;\"\u003e*Note: The color of the underglaze will change depending on your clay body and whether you use oxidation or reduction firing. Please test in your own kiln.\u003c\/p\u003e\n\u003ch2\u003e[Frequently Asked Questions]\u003c\/h2\u003e\n\u003cdl\u003e\n\u003cdt style=\"font-weight: bold; margin-top: 15px;\"\u003eQ: How do I use the pigment?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: It arrives in a highly concentrated paste form. Please dilute it with water according to your purpose. For line drawing (outlining), a general guide is 1 part Gosu to 3 parts water. For Dami (washes), use 1 teaspoon of Gosu to 80ml-250ml of water. Please adjust to find your ideal shade.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: Should I add a binder or adhesive (like gum arabic or CMC)?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Our Gosu does not contain added binders to allow you flexibility. If the pigment is not adhering well to your bisque ware, or if your painting process requires touching the surface repeatedly, we recommend adding a small amount of your preferred binder.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: How should I store it if I won't use it for a long time?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: We recommend storing it tightly sealed in the container. If it dries out, simply add water and grind it again in a mortar to return it to a paste.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: What causes the pigment to crawl or repel during firing?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Applying the pigment too thickly is the most common cause of crawling. It can also be caused by dust or oil (from hands) on the bisque ware before painting.\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003ch2\u003e[Shipping \u0026amp; Postage (International)]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/ZGVsaXZlcnlfMWRheQ.png?cmsp_timestamp=20240605194647\" alt=\"Fast Shipping\"\u003e\u003cbr\u003eIf you place your order \u003cu\u003ebefore noon (JST)\u003c\/u\u003e, it will generally be shipped \u003cspan style=\"color: #d32f2f;\"\u003e\u003cstrong\u003e\u003cu\u003ethe next business day\u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e from our factory in Japan.\u003cbr\u003e\u003cem\u003e*If your order includes made-to-order items like specific glazes, the entire order will be shipped once all items are ready.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAbout Shipping Fees:\u003c\/strong\u003e\u003cbr\u003eShipping costs are \u003cstrong\u003eautomatically calculated at checkout\u003c\/strong\u003e based on the total weight of your order and your delivery address (Country\/Region).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAvailable Shipping Methods:\u003c\/strong\u003e\u003cbr\u003eDuring checkout, you can choose the delivery method that best suits your needs.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eEMS (Express Mail Service)\u003c\/strong\u003e: Fast and reliable with tracking, but shipping fees are higher. Typically arrives in 3 to 7 days depending on the destination.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSurface Mail (Sea Mail)\u003c\/strong\u003e: The most economical option with lower shipping fees, but delivery is slow. It typically takes 1 to 3 months to arrive.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003e*Please note that customs duties or import taxes may apply upon arrival in your country, which are the responsibility of the buyer.\u003c\/em\u003e\u003c\/p\u003e","brand":"株式会社深海商店","offers":[{"title":"Paste 100g","offer_id":49064685011235,"sku":"100570","price":2100.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0523\/0115\/files\/022__No6_EC-min.jpg?v=1723448738"},{"product_id":"166961547","title":"Chinese Gosu No. 1 underglaze (100g)","description":"\u003ch2\u003e[Quality \u0026amp; Craftsmanship]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"High quality Arita blue and white porcelain\" src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/Y2FwLTE0LW1pbg.jpg?cmsp_timestamp=20240605201618\"\u003e\u003cbr\u003eFor over half a century, blue and white porcelain (Sometsuke) and Somenishiki ware created using Fukaumi Shouten's Gosu (blue underglaze) have been beloved by royalty and aristocrats worldwide, and proudly exhibited in museums.\u003cbr\u003e\u003cbr\u003e\u003cstrong style=\"color: #005bd3;\"\u003eFeatured on the BBC and Japanese National Television\u003c\/strong\u003e\u003cbr\u003eOur profound history and traditional techniques caught the attention of the world when we were featured on the prestigious UK television series, \u003cstrong\u003eBBC's \u003cem\u003e\"Great Japanese Railway Journeys\"\u003c\/em\u003e\u003c\/strong\u003e.\u003cbr\u003eIn Japan, artists utilizing our Gosu have been featured on prominent programs such as \"Wafu Souhonke\" and NHK's \"Ippin,\" which highlight the nation's finest traditional craftsmanship.\u003cbr\u003e\u003cbr\u003eOur products are also trusted for official signage at research institutions and government agencies throughout Japan. We promise to deliver this world-recognized, authentic Arita Blue directly to your studio.\u003c\/p\u003e\n\u003ch2\u003e[The Manufacturing Process]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc\/DSC01766-min.jpg?cmsp_timestamp=20221222111934\" alt=\"Gosu production process with traditional stone mill\"\u003e\u003cbr\u003eTo maintain this exceptional quality, it takes more than a month from the start of production to completion for Fukaumi Shouten's Gosu.\u003cbr\u003e\u003cbr\u003eBy combining \u003cstrong\u003e\u003cu\u003eFukaumi Shouten's unique ingredient blend\u003c\/u\u003e\u003c\/strong\u003e, \u003cstrong\u003e\u003cu\u003eour proprietary firing technique (Calcination)\u003c\/u\u003e\u003c\/strong\u003e, and \u003cstrong\u003e\u003cu\u003ethe only stone-milling technology in Japan to micro-pulverize the grains\u003c\/u\u003e\u003c\/strong\u003e, we achieve the ultimate underglaze.\u003cbr\u003e\u003cbr\u003eThrough these rigorous processes, \u003cstrong\u003e\u003cu\u003ebrushstrokes become incredibly smooth, and the Gosu is highly resistant to burning out, even at high concentrations\u003c\/u\u003e\u003c\/strong\u003e.\u003cbr\u003e\u003cstrong\u003e\u003cu\u003eYou will not need to hand-grind the pigment yourself once it arrives; it is ready to use.\u003c\/u\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003eFukaumi Shouten is the only historic Gosu manufacturer that sells its products directly online to individuals worldwide. That is why we can offer authentic, professional-grade quality directly from our factory.\u003c\/p\u003e\n\u003cdiv class=\"youtube\" style=\"margin: 30px 0;\"\u003e\u003ciframe width=\"100%\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/1myOuT9yp4s?si=J6uVaUCtCXrHTky3\" title=\"Fukaumi Shouten Gosu Manufacturing Process\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003ch2\u003e[The History of Gosu in Arita]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0yNC1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Antique Arita ware showing traditional blue underglaze\"\u003e\u003cbr\u003eThe synthetic Gosu currently used throughout Japan was developed by the Fukaumi family during the early Meiji period (late 19th century).\u003cbr\u003e\u003cbr\u003eIn 1870, the renowned German chemist Gottfried Wagener was invited to Arita.\u003cbr\u003eDr. Wagener taught Heizaemon Fukaumi and his sons, Suminosuke and Takeji, the chemical method of producing the color blue using cobalt.\u003cbr\u003e\u003cbr\u003eFollowing this, the Fukaumi family conducted extensive research and successfully developed a scientific method for producing stable Gosu.\u003cbr\u003eAs a result, vivid and reliable synthetic Gosu began to be widely used in Arita and across Japan, establishing the world-famous \"Japan Blue\".\u003cbr\u003e\u003cbr\u003ePlease experience our premium Gosu, born from centuries of history, tradition, and the power of chemistry.\u003cbr\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0zNS1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Fukaumi Shouten Gosu powder and paste\" style=\"margin-top: 15px;\"\u003e\u003c\/p\u003e\n\u003ch2\u003e[How to Use]\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Type\u003c\/strong\u003e: Suitable for both Porcelain and Stoneware\/Earthenware.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Method\u003c\/strong\u003e: Suitable for both Oxidation and Reduction firing.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOptimal Firing Temperature\u003c\/strong\u003e: 1230°C – 1300°C (2246°F – 2372°F)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e[Firing Conditions for Sample Plates]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/MjAyNDAxR09TVV9zYW1wbGVzLW1pbg.jpg?cmsp_timestamp=20240605194159\" alt=\"Gosu color sample plates fired in reduction\"\u003e\u003cbr\u003eThe color samples shown in the main product images were fired under the following conditions:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Body\u003c\/strong\u003e: Amakusa Pottery Stone (Porcelain)\u003cbr\u003e\u003cspan style=\"font-size: 0.85em; color: #666;\"\u003e(Composition: SiO2 72.04%, Al2O3 18.16%, Fe2O3 0.65%, TiO2 0.04%, CaO 0.49%, MgO 0.09%, Na2O 0.58%, K2O 3.00%, Ig.Loss 4.55%)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Temperature \u0026amp; Atmosphere\u003c\/strong\u003e: 1280°C (2336°F) \/ Reduction Firing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"color: #d32f2f; font-weight: bold; margin-top: 10px;\"\u003e*Note: The color of the underglaze will change depending on your clay body and whether you use oxidation or reduction firing. Please test in your own kiln.\u003c\/p\u003e\n\u003ch2\u003e[Frequently Asked Questions]\u003c\/h2\u003e\n\u003cdl\u003e\n\u003cdt style=\"font-weight: bold; margin-top: 15px;\"\u003eQ: How do I use the pigment?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: It arrives in a highly concentrated paste form. Please dilute it with water according to your purpose. For line drawing (outlining), a general guide is 1 part Gosu to 3 parts water. For Dami (washes), use 1 teaspoon of Gosu to 80ml-250ml of water. Please adjust to find your ideal shade.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: Should I add a binder or adhesive (like gum arabic or CMC)?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Our Gosu does not contain added binders to allow you flexibility. If the pigment is not adhering well to your bisque ware, or if your painting process requires touching the surface repeatedly, we recommend adding a small amount of your preferred binder.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: How should I store it if I won't use it for a long time?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: We recommend storing it tightly sealed in the container. If it dries out, simply add water and grind it again in a mortar to return it to a paste.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: What causes the pigment to crawl or repel during firing?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Applying the pigment too thickly is the most common cause of crawling. It can also be caused by dust or oil (from hands) on the bisque ware before painting.\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003ch2\u003e[Shipping \u0026amp; Postage (International)]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/ZGVsaXZlcnlfMWRheQ.png?cmsp_timestamp=20240605194647\" alt=\"Fast Shipping\"\u003e\u003cbr\u003eIf you place your order \u003cu\u003ebefore noon (JST)\u003c\/u\u003e, it will generally be shipped \u003cspan style=\"color: #d32f2f;\"\u003e\u003cstrong\u003e\u003cu\u003ethe next business day\u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e from our factory in Japan.\u003cbr\u003e\u003cem\u003e*If your order includes made-to-order items like specific glazes, the entire order will be shipped once all items are ready.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAbout Shipping Fees:\u003c\/strong\u003e\u003cbr\u003eShipping costs are \u003cstrong\u003eautomatically calculated at checkout\u003c\/strong\u003e based on the total weight of your order and your delivery address (Country\/Region).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAvailable Shipping Methods:\u003c\/strong\u003e\u003cbr\u003eDuring checkout, you can choose the delivery method that best suits your needs.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eEMS (Express Mail Service)\u003c\/strong\u003e: Fast and reliable with tracking, but shipping fees are higher. Typically arrives in 3 to 7 days depending on the destination.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSurface Mail (Sea Mail)\u003c\/strong\u003e: The most economical option with lower shipping fees, but delivery is slow. It typically takes 1 to 3 months to arrive.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003e*Please note that customs duties or import taxes may apply upon arrival in your country, which are the responsibility of the buyer.\u003c\/em\u003e\u003c\/p\u003e","brand":"株式会社深海商店","offers":[{"title":"Paste 100g","offer_id":49065088254243,"sku":"100266","price":2200.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0523\/0115\/files\/107__No5_EC-min.jpg?v=1723446965"},{"product_id":"166961701","title":"Shinwa Line underglaze (100g)","description":"\u003ch2\u003e[Quality \u0026amp; Craftsmanship]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"High quality Arita blue and white porcelain\" src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/Y2FwLTE0LW1pbg.jpg?cmsp_timestamp=20240605201618\"\u003e\u003cbr\u003eFor over half a century, blue and white porcelain (Sometsuke) and Somenishiki ware created using Fukaumi Shouten's Gosu (blue underglaze) have been beloved by royalty and aristocrats worldwide, and proudly exhibited in museums.\u003cbr\u003e\u003cbr\u003e\u003cstrong style=\"color: #005bd3;\"\u003eFeatured on the BBC and Japanese National Television\u003c\/strong\u003e\u003cbr\u003eOur profound history and traditional techniques caught the attention of the world when we were featured on the prestigious UK television series, \u003cstrong\u003eBBC's \u003cem\u003e\"Great Japanese Railway Journeys\"\u003c\/em\u003e\u003c\/strong\u003e.\u003cbr\u003eIn Japan, artists utilizing our Gosu have been featured on prominent programs such as \"Wafu Souhonke\" and NHK's \"Ippin,\" which highlight the nation's finest traditional craftsmanship.\u003cbr\u003e\u003cbr\u003eOur products are also trusted for official signage at research institutions and government agencies throughout Japan. We promise to deliver this world-recognized, authentic Arita Blue directly to your studio.\u003c\/p\u003e\n\u003ch2\u003e[The Manufacturing Process]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc\/DSC01766-min.jpg?cmsp_timestamp=20221222111934\" alt=\"Gosu production process with traditional stone mill\"\u003e\u003cbr\u003eTo maintain this exceptional quality, it takes more than a month from the start of production to completion for Fukaumi Shouten's Gosu.\u003cbr\u003e\u003cbr\u003eBy combining \u003cstrong\u003e\u003cu\u003eFukaumi Shouten's unique ingredient blend\u003c\/u\u003e\u003c\/strong\u003e, \u003cstrong\u003e\u003cu\u003eour proprietary firing technique (Calcination)\u003c\/u\u003e\u003c\/strong\u003e, and \u003cstrong\u003e\u003cu\u003ethe only stone-milling technology in Japan to micro-pulverize the grains\u003c\/u\u003e\u003c\/strong\u003e, we achieve the ultimate underglaze.\u003cbr\u003e\u003cbr\u003eThrough these rigorous processes, \u003cstrong\u003e\u003cu\u003ebrushstrokes become incredibly smooth, and the Gosu is highly resistant to burning out, even at high concentrations\u003c\/u\u003e\u003c\/strong\u003e.\u003cbr\u003e\u003cstrong\u003e\u003cu\u003eYou will not need to hand-grind the pigment yourself once it arrives; it is ready to use.\u003c\/u\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003eFukaumi Shouten is the only historic Gosu manufacturer that sells its products directly online to individuals worldwide. That is why we can offer authentic, professional-grade quality directly from our factory.\u003c\/p\u003e\n\u003cdiv class=\"youtube\" style=\"margin: 30px 0;\"\u003e\u003ciframe width=\"100%\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/1myOuT9yp4s?si=J6uVaUCtCXrHTky3\" title=\"Fukaumi Shouten Gosu Manufacturing Process\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003ch2\u003e[The History of Gosu in Arita]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0yNC1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Antique Arita ware showing traditional blue underglaze\"\u003e\u003cbr\u003eThe synthetic Gosu currently used throughout Japan was developed by the Fukaumi family during the early Meiji period (late 19th century).\u003cbr\u003e\u003cbr\u003eIn 1870, the renowned German chemist Gottfried Wagener was invited to Arita.\u003cbr\u003eDr. Wagener taught Heizaemon Fukaumi and his sons, Suminosuke and Takeji, the chemical method of producing the color blue using cobalt.\u003cbr\u003e\u003cbr\u003eFollowing this, the Fukaumi family conducted extensive research and successfully developed a scientific method for producing stable Gosu.\u003cbr\u003eAs a result, vivid and reliable synthetic Gosu began to be widely used in Arita and across Japan, establishing the world-famous \"Japan Blue\".\u003cbr\u003e\u003cbr\u003ePlease experience our premium Gosu, born from centuries of history, tradition, and the power of chemistry.\u003cbr\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0zNS1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Fukaumi Shouten Gosu powder and paste\" style=\"margin-top: 15px;\"\u003e\u003c\/p\u003e\n\u003ch2\u003e[How to Use]\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Type\u003c\/strong\u003e: Suitable for both Porcelain and Stoneware\/Earthenware.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Method\u003c\/strong\u003e: Suitable for both Oxidation and Reduction firing.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOptimal Firing Temperature\u003c\/strong\u003e: 1230°C – 1300°C (2246°F – 2372°F)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e[Firing Conditions for Sample Plates]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/MjAyNDAxR09TVV9zYW1wbGVzLW1pbg.jpg?cmsp_timestamp=20240605194159\" alt=\"Gosu color sample plates fired in reduction\"\u003e\u003cbr\u003eThe color samples shown in the main product images were fired under the following conditions:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Body\u003c\/strong\u003e: Amakusa Pottery Stone (Porcelain)\u003cbr\u003e\u003cspan style=\"font-size: 0.85em; color: #666;\"\u003e(Composition: SiO2 72.04%, Al2O3 18.16%, Fe2O3 0.65%, TiO2 0.04%, CaO 0.49%, MgO 0.09%, Na2O 0.58%, K2O 3.00%, Ig.Loss 4.55%)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Temperature \u0026amp; Atmosphere\u003c\/strong\u003e: 1280°C (2336°F) \/ Reduction Firing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"color: #d32f2f; font-weight: bold; margin-top: 10px;\"\u003e*Note: The color of the underglaze will change depending on your clay body and whether you use oxidation or reduction firing. Please test in your own kiln.\u003c\/p\u003e\n\u003ch2\u003e[Frequently Asked Questions]\u003c\/h2\u003e\n\u003cdl\u003e\n\u003cdt style=\"font-weight: bold; margin-top: 15px;\"\u003eQ: How do I use the pigment?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: It arrives in a highly concentrated paste form. Please dilute it with water according to your purpose. For line drawing (outlining), a general guide is 1 part Gosu to 3 parts water. For Dami (washes), use 1 teaspoon of Gosu to 80ml-250ml of water. Please adjust to find your ideal shade.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: Should I add a binder or adhesive (like gum arabic or CMC)?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Our Gosu does not contain added binders to allow you flexibility. If the pigment is not adhering well to your bisque ware, or if your painting process requires touching the surface repeatedly, we recommend adding a small amount of your preferred binder.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: How should I store it if I won't use it for a long time?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: We recommend storing it tightly sealed in the container. If it dries out, simply add water and grind it again in a mortar to return it to a paste.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: What causes the pigment to crawl or repel during firing?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Applying the pigment too thickly is the most common cause of crawling. It can also be caused by dust or oil (from hands) on the bisque ware before painting.\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003ch2\u003e[Shipping \u0026amp; Postage (International)]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/ZGVsaXZlcnlfMWRheQ.png?cmsp_timestamp=20240605194647\" alt=\"Fast Shipping\"\u003e\u003cbr\u003eIf you place your order \u003cu\u003ebefore noon (JST)\u003c\/u\u003e, it will generally be shipped \u003cspan style=\"color: #d32f2f;\"\u003e\u003cstrong\u003e\u003cu\u003ethe next business day\u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e from our factory in Japan.\u003cbr\u003e\u003cem\u003e*If your order includes made-to-order items like specific glazes, the entire order will be shipped once all items are ready.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAbout Shipping Fees:\u003c\/strong\u003e\u003cbr\u003eShipping costs are \u003cstrong\u003eautomatically calculated at checkout\u003c\/strong\u003e based on the total weight of your order and your delivery address (Country\/Region).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAvailable Shipping Methods:\u003c\/strong\u003e\u003cbr\u003eDuring checkout, you can choose the delivery method that best suits your needs.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eEMS (Express Mail Service)\u003c\/strong\u003e: Fast and reliable with tracking, but shipping fees are higher. Typically arrives in 3 to 7 days depending on the destination.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSurface Mail (Sea Mail)\u003c\/strong\u003e: The most economical option with lower shipping fees, but delivery is slow. It typically takes 1 to 3 months to arrive.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003e*Please note that customs duties or import taxes may apply upon arrival in your country, which are the responsibility of the buyer.\u003c\/em\u003e\u003c\/p\u003e","brand":"株式会社深海商店","offers":[{"title":"Paste 100g","offer_id":49065271755043,"sku":"100480","price":3000.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0523\/0115\/files\/043___EC-min.jpg?v=1723452573"},{"product_id":"166961743","title":"Lapis Lazuli Gosu underglaze (100g)","description":"\u003ch2\u003e[Quality \u0026amp; Craftsmanship]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"High quality Arita blue and white porcelain\" src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/Y2FwLTE0LW1pbg.jpg?cmsp_timestamp=20240605201618\"\u003e\u003cbr\u003eFor over half a century, blue and white porcelain (Sometsuke) and Somenishiki ware created using Fukaumi Shouten's Gosu (blue underglaze) have been beloved by royalty and aristocrats worldwide, and proudly exhibited in museums.\u003cbr\u003e\u003cbr\u003e\u003cstrong style=\"color: #005bd3;\"\u003eFeatured on the BBC and Japanese National Television\u003c\/strong\u003e\u003cbr\u003eOur profound history and traditional techniques caught the attention of the world when we were featured on the prestigious UK television series, \u003cstrong\u003eBBC's \u003cem\u003e\"Great Japanese Railway Journeys\"\u003c\/em\u003e\u003c\/strong\u003e.\u003cbr\u003eIn Japan, artists utilizing our Gosu have been featured on prominent programs such as \"Wafu Souhonke\" and NHK's \"Ippin,\" which highlight the nation's finest traditional craftsmanship.\u003cbr\u003e\u003cbr\u003eOur products are also trusted for official signage at research institutions and government agencies throughout Japan. We promise to deliver this world-recognized, authentic Arita Blue directly to your studio.\u003c\/p\u003e\n\u003ch2\u003e[The Manufacturing Process]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc\/DSC01766-min.jpg?cmsp_timestamp=20221222111934\" alt=\"Gosu production process with traditional stone mill\"\u003e\u003cbr\u003eTo maintain this exceptional quality, it takes more than a month from the start of production to completion for Fukaumi Shouten's Gosu.\u003cbr\u003e\u003cbr\u003eBy combining \u003cstrong\u003e\u003cu\u003eFukaumi Shouten's unique ingredient blend\u003c\/u\u003e\u003c\/strong\u003e, \u003cstrong\u003e\u003cu\u003eour proprietary firing technique (Calcination)\u003c\/u\u003e\u003c\/strong\u003e, and \u003cstrong\u003e\u003cu\u003ethe only stone-milling technology in Japan to micro-pulverize the grains\u003c\/u\u003e\u003c\/strong\u003e, we achieve the ultimate underglaze.\u003cbr\u003e\u003cbr\u003eThrough these rigorous processes, \u003cstrong\u003e\u003cu\u003ebrushstrokes become incredibly smooth, and the Gosu is highly resistant to burning out, even at high concentrations\u003c\/u\u003e\u003c\/strong\u003e.\u003cbr\u003e\u003cstrong\u003e\u003cu\u003eYou will not need to hand-grind the pigment yourself once it arrives; it is ready to use.\u003c\/u\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003eFukaumi Shouten is the only historic Gosu manufacturer that sells its products directly online to individuals worldwide. That is why we can offer authentic, professional-grade quality directly from our factory.\u003c\/p\u003e\n\u003cdiv class=\"youtube\" style=\"margin: 30px 0;\"\u003e\u003ciframe width=\"100%\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/1myOuT9yp4s?si=J6uVaUCtCXrHTky3\" title=\"Fukaumi Shouten Gosu Manufacturing Process\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003ch2\u003e[The History of Gosu in Arita]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0yNC1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Antique Arita ware showing traditional blue underglaze\"\u003e\u003cbr\u003eThe synthetic Gosu currently used throughout Japan was developed by the Fukaumi family during the early Meiji period (late 19th century).\u003cbr\u003e\u003cbr\u003eIn 1870, the renowned German chemist Gottfried Wagener was invited to Arita.\u003cbr\u003eDr. Wagener taught Heizaemon Fukaumi and his sons, Suminosuke and Takeji, the chemical method of producing the color blue using cobalt.\u003cbr\u003e\u003cbr\u003eFollowing this, the Fukaumi family conducted extensive research and successfully developed a scientific method for producing stable Gosu.\u003cbr\u003eAs a result, vivid and reliable synthetic Gosu began to be widely used in Arita and across Japan, establishing the world-famous \"Japan Blue\".\u003cbr\u003e\u003cbr\u003ePlease experience our premium Gosu, born from centuries of history, tradition, and the power of chemistry.\u003cbr\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0zNS1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Fukaumi Shouten Gosu powder and paste\" style=\"margin-top: 15px;\"\u003e\u003c\/p\u003e\n\u003ch2\u003e[How to Use]\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Type\u003c\/strong\u003e: Suitable for both Porcelain and Stoneware\/Earthenware.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Method\u003c\/strong\u003e: Suitable for both Oxidation and Reduction firing.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOptimal Firing Temperature\u003c\/strong\u003e: 1230°C – 1300°C (2246°F – 2372°F)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e[Firing Conditions for Sample Plates]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/MjAyNDAxR09TVV9zYW1wbGVzLW1pbg.jpg?cmsp_timestamp=20240605194159\" alt=\"Gosu color sample plates fired in reduction\"\u003e\u003cbr\u003eThe color samples shown in the main product images were fired under the following conditions:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Body\u003c\/strong\u003e: Amakusa Pottery Stone (Porcelain)\u003cbr\u003e\u003cspan style=\"font-size: 0.85em; color: #666;\"\u003e(Composition: SiO2 72.04%, Al2O3 18.16%, Fe2O3 0.65%, TiO2 0.04%, CaO 0.49%, MgO 0.09%, Na2O 0.58%, K2O 3.00%, Ig.Loss 4.55%)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Temperature \u0026amp; Atmosphere\u003c\/strong\u003e: 1280°C (2336°F) \/ Reduction Firing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"color: #d32f2f; font-weight: bold; margin-top: 10px;\"\u003e*Note: The color of the underglaze will change depending on your clay body and whether you use oxidation or reduction firing. Please test in your own kiln.\u003c\/p\u003e\n\u003ch2\u003e[Frequently Asked Questions]\u003c\/h2\u003e\n\u003cdl\u003e\n\u003cdt style=\"font-weight: bold; margin-top: 15px;\"\u003eQ: How do I use the pigment?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: It arrives in a highly concentrated paste form. Please dilute it with water according to your purpose. For line drawing (outlining), a general guide is 1 part Gosu to 3 parts water. For Dami (washes), use 1 teaspoon of Gosu to 80ml-250ml of water. Please adjust to find your ideal shade.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: Should I add a binder or adhesive (like gum arabic or CMC)?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Our Gosu does not contain added binders to allow you flexibility. If the pigment is not adhering well to your bisque ware, or if your painting process requires touching the surface repeatedly, we recommend adding a small amount of your preferred binder.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: How should I store it if I won't use it for a long time?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: We recommend storing it tightly sealed in the container. If it dries out, simply add water and grind it again in a mortar to return it to a paste.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: What causes the pigment to crawl or repel during firing?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Applying the pigment too thickly is the most common cause of crawling. It can also be caused by dust or oil (from hands) on the bisque ware before painting.\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003ch2\u003e[Shipping \u0026amp; Postage (International)]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/ZGVsaXZlcnlfMWRheQ.png?cmsp_timestamp=20240605194647\" alt=\"Fast Shipping\"\u003e\u003cbr\u003eIf you place your order \u003cu\u003ebefore noon (JST)\u003c\/u\u003e, it will generally be shipped \u003cspan style=\"color: #d32f2f;\"\u003e\u003cstrong\u003e\u003cu\u003ethe next business day\u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e from our factory in Japan.\u003cbr\u003e\u003cem\u003e*If your order includes made-to-order items like specific glazes, the entire order will be shipped once all items are ready.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAbout Shipping Fees:\u003c\/strong\u003e\u003cbr\u003eShipping costs are \u003cstrong\u003eautomatically calculated at checkout\u003c\/strong\u003e based on the total weight of your order and your delivery address (Country\/Region).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAvailable Shipping Methods:\u003c\/strong\u003e\u003cbr\u003eDuring checkout, you can choose the delivery method that best suits your needs.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eEMS (Express Mail Service)\u003c\/strong\u003e: Fast and reliable with tracking, but shipping fees are higher. Typically arrives in 3 to 7 days depending on the destination.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSurface Mail (Sea Mail)\u003c\/strong\u003e: The most economical option with lower shipping fees, but delivery is slow. It typically takes 1 to 3 months to arrive.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003e*Please note that customs duties or import taxes may apply upon arrival in your country, which are the responsibility of the buyer.\u003c\/em\u003e\u003c\/p\u003e","brand":"株式会社深海商店","offers":[{"title":"Paste 100g","offer_id":49065007644963,"sku":"100120","price":2600.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0523\/0115\/files\/063___EC-min.jpg?v=1770941221"},{"product_id":"166961773","title":"Blue 2 underglaze (100g)","description":"\u003ch2\u003e[Quality \u0026amp; Craftsmanship]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"High quality Arita blue and white porcelain\" src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/Y2FwLTE0LW1pbg.jpg?cmsp_timestamp=20240605201618\"\u003e\u003cbr\u003eFor over half a century, blue and white porcelain (Sometsuke) and Somenishiki ware created using Fukaumi Shouten's Gosu (blue underglaze) have been beloved by royalty and aristocrats worldwide, and proudly exhibited in museums.\u003cbr\u003e\u003cbr\u003e\u003cstrong style=\"color: #005bd3;\"\u003eFeatured on the BBC and Japanese National Television\u003c\/strong\u003e\u003cbr\u003eOur profound history and traditional techniques caught the attention of the world when we were featured on the prestigious UK television series, \u003cstrong\u003eBBC's \u003cem\u003e\"Great Japanese Railway Journeys\"\u003c\/em\u003e\u003c\/strong\u003e.\u003cbr\u003eIn Japan, artists utilizing our Gosu have been featured on prominent programs such as \"Wafu Souhonke\" and NHK's \"Ippin,\" which highlight the nation's finest traditional craftsmanship.\u003cbr\u003e\u003cbr\u003eOur products are also trusted for official signage at research institutions and government agencies throughout Japan. We promise to deliver this world-recognized, authentic Arita Blue directly to your studio.\u003c\/p\u003e\n\u003ch2\u003e[The Manufacturing Process]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc\/DSC01766-min.jpg?cmsp_timestamp=20221222111934\" alt=\"Gosu production process with traditional stone mill\"\u003e\u003cbr\u003eTo maintain this exceptional quality, it takes more than a month from the start of production to completion for Fukaumi Shouten's Gosu.\u003cbr\u003e\u003cbr\u003eBy combining \u003cstrong\u003e\u003cu\u003eFukaumi Shouten's unique ingredient blend\u003c\/u\u003e\u003c\/strong\u003e, \u003cstrong\u003e\u003cu\u003eour proprietary firing technique (Calcination)\u003c\/u\u003e\u003c\/strong\u003e, and \u003cstrong\u003e\u003cu\u003ethe only stone-milling technology in Japan to micro-pulverize the grains\u003c\/u\u003e\u003c\/strong\u003e, we achieve the ultimate underglaze.\u003cbr\u003e\u003cbr\u003eThrough these rigorous processes, \u003cstrong\u003e\u003cu\u003ebrushstrokes become incredibly smooth, and the Gosu is highly resistant to burning out, even at high concentrations\u003c\/u\u003e\u003c\/strong\u003e.\u003cbr\u003e\u003cstrong\u003e\u003cu\u003eYou will not need to hand-grind the pigment yourself once it arrives; it is ready to use.\u003c\/u\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003eFukaumi Shouten is the only historic Gosu manufacturer that sells its products directly online to individuals worldwide. That is why we can offer authentic, professional-grade quality directly from our factory.\u003c\/p\u003e\n\u003cdiv class=\"youtube\" style=\"margin: 30px 0;\"\u003e\u003ciframe width=\"100%\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/1myOuT9yp4s?si=J6uVaUCtCXrHTky3\" title=\"Fukaumi Shouten Gosu Manufacturing Process\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003ch2\u003e[The History of Gosu in Arita]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0yNC1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Antique Arita ware showing traditional blue underglaze\"\u003e\u003cbr\u003eThe synthetic Gosu currently used throughout Japan was developed by the Fukaumi family during the early Meiji period (late 19th century).\u003cbr\u003e\u003cbr\u003eIn 1870, the renowned German chemist Gottfried Wagener was invited to Arita.\u003cbr\u003eDr. Wagener taught Heizaemon Fukaumi and his sons, Suminosuke and Takeji, the chemical method of producing the color blue using cobalt.\u003cbr\u003e\u003cbr\u003eFollowing this, the Fukaumi family conducted extensive research and successfully developed a scientific method for producing stable Gosu.\u003cbr\u003eAs a result, vivid and reliable synthetic Gosu began to be widely used in Arita and across Japan, establishing the world-famous \"Japan Blue\".\u003cbr\u003e\u003cbr\u003ePlease experience our premium Gosu, born from centuries of history, tradition, and the power of chemistry.\u003cbr\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0zNS1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Fukaumi Shouten Gosu powder and paste\" style=\"margin-top: 15px;\"\u003e\u003c\/p\u003e\n\u003ch2\u003e[How to Use]\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Type\u003c\/strong\u003e: Suitable for both Porcelain and Stoneware\/Earthenware.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Method\u003c\/strong\u003e: Suitable for both Oxidation and Reduction firing.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOptimal Firing Temperature\u003c\/strong\u003e: 1230°C – 1300°C (2246°F – 2372°F)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e[Firing Conditions for Sample Plates]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/MjAyNDAxR09TVV9zYW1wbGVzLW1pbg.jpg?cmsp_timestamp=20240605194159\" alt=\"Gosu color sample plates fired in reduction\"\u003e\u003cbr\u003eThe color samples shown in the main product images were fired under the following conditions:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Body\u003c\/strong\u003e: Amakusa Pottery Stone (Porcelain)\u003cbr\u003e\u003cspan style=\"font-size: 0.85em; color: #666;\"\u003e(Composition: SiO2 72.04%, Al2O3 18.16%, Fe2O3 0.65%, TiO2 0.04%, CaO 0.49%, MgO 0.09%, Na2O 0.58%, K2O 3.00%, Ig.Loss 4.55%)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Temperature \u0026amp; Atmosphere\u003c\/strong\u003e: 1280°C (2336°F) \/ Reduction Firing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"color: #d32f2f; font-weight: bold; margin-top: 10px;\"\u003e*Note: The color of the underglaze will change depending on your clay body and whether you use oxidation or reduction firing. Please test in your own kiln.\u003c\/p\u003e\n\u003ch2\u003e[Frequently Asked Questions]\u003c\/h2\u003e\n\u003cdl\u003e\n\u003cdt style=\"font-weight: bold; margin-top: 15px;\"\u003eQ: How do I use the pigment?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: It arrives in a highly concentrated paste form. Please dilute it with water according to your purpose. For line drawing (outlining), a general guide is 1 part Gosu to 3 parts water. For Dami (washes), use 1 teaspoon of Gosu to 80ml-250ml of water. Please adjust to find your ideal shade.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: Should I add a binder or adhesive (like gum arabic or CMC)?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Our Gosu does not contain added binders to allow you flexibility. If the pigment is not adhering well to your bisque ware, or if your painting process requires touching the surface repeatedly, we recommend adding a small amount of your preferred binder.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: How should I store it if I won't use it for a long time?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: We recommend storing it tightly sealed in the container. If it dries out, simply add water and grind it again in a mortar to return it to a paste.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: What causes the pigment to crawl or repel during firing?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Applying the pigment too thickly is the most common cause of crawling. It can also be caused by dust or oil (from hands) on the bisque ware before painting.\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003ch2\u003e[Shipping \u0026amp; Postage (International)]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/ZGVsaXZlcnlfMWRheQ.png?cmsp_timestamp=20240605194647\" alt=\"Fast Shipping\"\u003e\u003cbr\u003eIf you place your order \u003cu\u003ebefore noon (JST)\u003c\/u\u003e, it will generally be shipped \u003cspan style=\"color: #d32f2f;\"\u003e\u003cstrong\u003e\u003cu\u003ethe next business day\u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e from our factory in Japan.\u003cbr\u003e\u003cem\u003e*If your order includes made-to-order items like specific glazes, the entire order will be shipped once all items are ready.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAbout Shipping Fees:\u003c\/strong\u003e\u003cbr\u003eShipping costs are \u003cstrong\u003eautomatically calculated at checkout\u003c\/strong\u003e based on the total weight of your order and your delivery address (Country\/Region).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAvailable Shipping Methods:\u003c\/strong\u003e\u003cbr\u003eDuring checkout, you can choose the delivery method that best suits your needs.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eEMS (Express Mail Service)\u003c\/strong\u003e: Fast and reliable with tracking, but shipping fees are higher. Typically arrives in 3 to 7 days depending on the destination.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSurface Mail (Sea Mail)\u003c\/strong\u003e: The most economical option with lower shipping fees, but delivery is slow. It typically takes 1 to 3 months to arrive.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003e*Please note that customs duties or import taxes may apply upon arrival in your country, which are the responsibility of the buyer.\u003c\/em\u003e\u003c\/p\u003e","brand":"株式会社深海商店","offers":[{"title":"Paste 100g","offer_id":49065371271459,"sku":"100200","price":2300.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0523\/0115\/files\/033___EC-min.jpg?v=1723453529"},{"product_id":"166961797","title":"Black 3 underglaze(100g)","description":"\u003ch2\u003e[Quality \u0026amp; Craftsmanship]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"High quality Arita blue and white porcelain\" src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/Y2FwLTE0LW1pbg.jpg?cmsp_timestamp=20240605201618\"\u003e\u003cbr\u003eFor over half a century, blue and white porcelain (Sometsuke) and Somenishiki ware created using Fukaumi Shouten's Gosu (blue underglaze) have been beloved by royalty and aristocrats worldwide, and proudly exhibited in museums.\u003cbr\u003e\u003cbr\u003e\u003cstrong style=\"color: #005bd3;\"\u003eFeatured on the BBC and Japanese National Television\u003c\/strong\u003e\u003cbr\u003eOur profound history and traditional techniques caught the attention of the world when we were featured on the prestigious UK television series, \u003cstrong\u003eBBC's \u003cem\u003e\"Great Japanese Railway Journeys\"\u003c\/em\u003e\u003c\/strong\u003e.\u003cbr\u003eIn Japan, artists utilizing our Gosu have been featured on prominent programs such as \"Wafu Souhonke\" and NHK's \"Ippin,\" which highlight the nation's finest traditional craftsmanship.\u003cbr\u003e\u003cbr\u003eOur products are also trusted for official signage at research institutions and government agencies throughout Japan. We promise to deliver this world-recognized, authentic Arita Blue directly to your studio.\u003c\/p\u003e\n\u003ch2\u003e[The Manufacturing Process]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc\/DSC01766-min.jpg?cmsp_timestamp=20221222111934\" alt=\"Gosu production process with traditional stone mill\"\u003e\u003cbr\u003eTo maintain this exceptional quality, it takes more than a month from the start of production to completion for Fukaumi Shouten's Gosu.\u003cbr\u003e\u003cbr\u003eBy combining \u003cstrong\u003e\u003cu\u003eFukaumi Shouten's unique ingredient blend\u003c\/u\u003e\u003c\/strong\u003e, \u003cstrong\u003e\u003cu\u003eour proprietary firing technique (Calcination)\u003c\/u\u003e\u003c\/strong\u003e, and \u003cstrong\u003e\u003cu\u003ethe only stone-milling technology in Japan to micro-pulverize the grains\u003c\/u\u003e\u003c\/strong\u003e, we achieve the ultimate underglaze.\u003cbr\u003e\u003cbr\u003eThrough these rigorous processes, \u003cstrong\u003e\u003cu\u003ebrushstrokes become incredibly smooth, and the Gosu is highly resistant to burning out, even at high concentrations\u003c\/u\u003e\u003c\/strong\u003e.\u003cbr\u003e\u003cstrong\u003e\u003cu\u003eYou will not need to hand-grind the pigment yourself once it arrives; it is ready to use.\u003c\/u\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003eFukaumi Shouten is the only historic Gosu manufacturer that sells its products directly online to individuals worldwide. That is why we can offer authentic, professional-grade quality directly from our factory.\u003c\/p\u003e\n\u003cdiv class=\"youtube\" style=\"margin: 30px 0;\"\u003e\u003ciframe width=\"100%\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/1myOuT9yp4s?si=J6uVaUCtCXrHTky3\" title=\"Fukaumi Shouten Gosu Manufacturing Process\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003ch2\u003e[The History of Gosu in Arita]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0yNC1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Antique Arita ware showing traditional blue underglaze\"\u003e\u003cbr\u003eThe synthetic Gosu currently used throughout Japan was developed by the Fukaumi family during the early Meiji period (late 19th century).\u003cbr\u003e\u003cbr\u003eIn 1870, the renowned German chemist Gottfried Wagener was invited to Arita.\u003cbr\u003eDr. Wagener taught Heizaemon Fukaumi and his sons, Suminosuke and Takeji, the chemical method of producing the color blue using cobalt.\u003cbr\u003e\u003cbr\u003eFollowing this, the Fukaumi family conducted extensive research and successfully developed a scientific method for producing stable Gosu.\u003cbr\u003eAs a result, vivid and reliable synthetic Gosu began to be widely used in Arita and across Japan, establishing the world-famous \"Japan Blue\".\u003cbr\u003e\u003cbr\u003ePlease experience our premium Gosu, born from centuries of history, tradition, and the power of chemistry.\u003cbr\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0zNS1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Fukaumi Shouten Gosu powder and paste\" style=\"margin-top: 15px;\"\u003e\u003c\/p\u003e\n\u003ch2\u003e[How to Use]\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Type\u003c\/strong\u003e: Suitable for both Porcelain and Stoneware\/Earthenware.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Method\u003c\/strong\u003e: Suitable for both Oxidation and Reduction firing.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOptimal Firing Temperature\u003c\/strong\u003e: 1230°C – 1300°C (2246°F – 2372°F)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e[Firing Conditions for Sample Plates]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/MjAyNDAxR09TVV9zYW1wbGVzLW1pbg.jpg?cmsp_timestamp=20240605194159\" alt=\"Gosu color sample plates fired in reduction\"\u003e\u003cbr\u003eThe color samples shown in the main product images were fired under the following conditions:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Body\u003c\/strong\u003e: Amakusa Pottery Stone (Porcelain)\u003cbr\u003e\u003cspan style=\"font-size: 0.85em; color: #666;\"\u003e(Composition: SiO2 72.04%, Al2O3 18.16%, Fe2O3 0.65%, TiO2 0.04%, CaO 0.49%, MgO 0.09%, Na2O 0.58%, K2O 3.00%, Ig.Loss 4.55%)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Temperature \u0026amp; Atmosphere\u003c\/strong\u003e: 1280°C (2336°F) \/ Reduction Firing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"color: #d32f2f; font-weight: bold; margin-top: 10px;\"\u003e*Note: The color of the underglaze will change depending on your clay body and whether you use oxidation or reduction firing. Please test in your own kiln.\u003c\/p\u003e\n\u003ch2\u003e[Frequently Asked Questions]\u003c\/h2\u003e\n\u003cdl\u003e\n\u003cdt style=\"font-weight: bold; margin-top: 15px;\"\u003eQ: How do I use the pigment?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: It arrives in a highly concentrated paste form. Please dilute it with water according to your purpose. For line drawing (outlining), a general guide is 1 part Gosu to 3 parts water. For Dami (washes), use 1 teaspoon of Gosu to 80ml-250ml of water. Please adjust to find your ideal shade.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: Should I add a binder or adhesive (like gum arabic or CMC)?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Our Gosu does not contain added binders to allow you flexibility. If the pigment is not adhering well to your bisque ware, or if your painting process requires touching the surface repeatedly, we recommend adding a small amount of your preferred binder.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: How should I store it if I won't use it for a long time?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: We recommend storing it tightly sealed in the container. If it dries out, simply add water and grind it again in a mortar to return it to a paste.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: What causes the pigment to crawl or repel during firing?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Applying the pigment too thickly is the most common cause of crawling. It can also be caused by dust or oil (from hands) on the bisque ware before painting.\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003ch2\u003e[Shipping \u0026amp; Postage (International)]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/ZGVsaXZlcnlfMWRheQ.png?cmsp_timestamp=20240605194647\" alt=\"Fast Shipping\"\u003e\u003cbr\u003eIf you place your order \u003cu\u003ebefore noon (JST)\u003c\/u\u003e, it will generally be shipped \u003cspan style=\"color: #d32f2f;\"\u003e\u003cstrong\u003e\u003cu\u003ethe next business day\u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e from our factory in Japan.\u003cbr\u003e\u003cem\u003e*If your order includes made-to-order items like specific glazes, the entire order will be shipped once all items are ready.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAbout Shipping Fees:\u003c\/strong\u003e\u003cbr\u003eShipping costs are \u003cstrong\u003eautomatically calculated at checkout\u003c\/strong\u003e based on the total weight of your order and your delivery address (Country\/Region).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAvailable Shipping Methods:\u003c\/strong\u003e\u003cbr\u003eDuring checkout, you can choose the delivery method that best suits your needs.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eEMS (Express Mail Service)\u003c\/strong\u003e: Fast and reliable with tracking, but shipping fees are higher. Typically arrives in 3 to 7 days depending on the destination.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSurface Mail (Sea Mail)\u003c\/strong\u003e: The most economical option with lower shipping fees, but delivery is slow. It typically takes 1 to 3 months to arrive.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003e*Please note that customs duties or import taxes may apply upon arrival in your country, which are the responsibility of the buyer.\u003c\/em\u003e\u003c\/p\u003e","brand":"株式会社深海商店","offers":[{"title":"Paste 100g","offer_id":49065017770275,"sku":"100380","price":1900.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0523\/0115\/files\/072___EC-min.jpg?v=1770941207"},{"product_id":"166961819","title":"Chinese Rust Gosu underglaze(100g)","description":"\u003ch2\u003e[Quality \u0026amp; Craftsmanship]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"High quality Arita blue and white porcelain\" src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/Y2FwLTE0LW1pbg.jpg?cmsp_timestamp=20240605201618\"\u003e\u003cbr\u003eFor over half a century, blue and white porcelain (Sometsuke) and Somenishiki ware created using Fukaumi Shouten's Gosu (blue underglaze) have been beloved by royalty and aristocrats worldwide, and proudly exhibited in museums.\u003cbr\u003e\u003cbr\u003e\u003cstrong style=\"color: #005bd3;\"\u003eFeatured on the BBC and Japanese National Television\u003c\/strong\u003e\u003cbr\u003eOur profound history and traditional techniques caught the attention of the world when we were featured on the prestigious UK television series, \u003cstrong\u003eBBC's \u003cem\u003e\"Great Japanese Railway Journeys\"\u003c\/em\u003e\u003c\/strong\u003e.\u003cbr\u003eIn Japan, artists utilizing our Gosu have been featured on prominent programs such as \"Wafu Souhonke\" and NHK's \"Ippin,\" which highlight the nation's finest traditional craftsmanship.\u003cbr\u003e\u003cbr\u003eOur products are also trusted for official signage at research institutions and government agencies throughout Japan. We promise to deliver this world-recognized, authentic Arita Blue directly to your studio.\u003c\/p\u003e\n\u003ch2\u003e[The Manufacturing Process]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc\/DSC01766-min.jpg?cmsp_timestamp=20221222111934\" alt=\"Gosu production process with traditional stone mill\"\u003e\u003cbr\u003eTo maintain this exceptional quality, it takes more than a month from the start of production to completion for Fukaumi Shouten's Gosu.\u003cbr\u003e\u003cbr\u003eBy combining \u003cstrong\u003e\u003cu\u003eFukaumi Shouten's unique ingredient blend\u003c\/u\u003e\u003c\/strong\u003e, \u003cstrong\u003e\u003cu\u003eour proprietary firing technique (Calcination)\u003c\/u\u003e\u003c\/strong\u003e, and \u003cstrong\u003e\u003cu\u003ethe only stone-milling technology in Japan to micro-pulverize the grains\u003c\/u\u003e\u003c\/strong\u003e, we achieve the ultimate underglaze.\u003cbr\u003e\u003cbr\u003eThrough these rigorous processes, \u003cstrong\u003e\u003cu\u003ebrushstrokes become incredibly smooth, and the Gosu is highly resistant to burning out, even at high concentrations\u003c\/u\u003e\u003c\/strong\u003e.\u003cbr\u003e\u003cstrong\u003e\u003cu\u003eYou will not need to hand-grind the pigment yourself once it arrives; it is ready to use.\u003c\/u\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003eFukaumi Shouten is the only historic Gosu manufacturer that sells its products directly online to individuals worldwide. That is why we can offer authentic, professional-grade quality directly from our factory.\u003c\/p\u003e\n\u003cdiv class=\"youtube\" style=\"margin: 30px 0;\"\u003e\u003ciframe width=\"100%\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/1myOuT9yp4s?si=J6uVaUCtCXrHTky3\" title=\"Fukaumi Shouten Gosu Manufacturing Process\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003ch2\u003e[The History of Gosu in Arita]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0yNC1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Antique Arita ware showing traditional blue underglaze\"\u003e\u003cbr\u003eThe synthetic Gosu currently used throughout Japan was developed by the Fukaumi family during the early Meiji period (late 19th century).\u003cbr\u003e\u003cbr\u003eIn 1870, the renowned German chemist Gottfried Wagener was invited to Arita.\u003cbr\u003eDr. Wagener taught Heizaemon Fukaumi and his sons, Suminosuke and Takeji, the chemical method of producing the color blue using cobalt.\u003cbr\u003e\u003cbr\u003eFollowing this, the Fukaumi family conducted extensive research and successfully developed a scientific method for producing stable Gosu.\u003cbr\u003eAs a result, vivid and reliable synthetic Gosu began to be widely used in Arita and across Japan, establishing the world-famous \"Japan Blue\".\u003cbr\u003e\u003cbr\u003ePlease experience our premium Gosu, born from centuries of history, tradition, and the power of chemistry.\u003cbr\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0zNS1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Fukaumi Shouten Gosu powder and paste\" style=\"margin-top: 15px;\"\u003e\u003c\/p\u003e\n\u003ch2\u003e[How to Use]\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Type\u003c\/strong\u003e: Suitable for both Porcelain and Stoneware\/Earthenware.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Method\u003c\/strong\u003e: Suitable for both Oxidation and Reduction firing.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOptimal Firing Temperature\u003c\/strong\u003e: 1230°C – 1300°C (2246°F – 2372°F)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e[Firing Conditions for Sample Plates]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/MjAyNDAxR09TVV9zYW1wbGVzLW1pbg.jpg?cmsp_timestamp=20240605194159\" alt=\"Gosu color sample plates fired in reduction\"\u003e\u003cbr\u003eThe color samples shown in the main product images were fired under the following conditions:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Body\u003c\/strong\u003e: Amakusa Pottery Stone (Porcelain)\u003cbr\u003e\u003cspan style=\"font-size: 0.85em; color: #666;\"\u003e(Composition: SiO2 72.04%, Al2O3 18.16%, Fe2O3 0.65%, TiO2 0.04%, CaO 0.49%, MgO 0.09%, Na2O 0.58%, K2O 3.00%, Ig.Loss 4.55%)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Temperature \u0026amp; Atmosphere\u003c\/strong\u003e: 1280°C (2336°F) \/ Reduction Firing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"color: #d32f2f; font-weight: bold; margin-top: 10px;\"\u003e*Note: The color of the underglaze will change depending on your clay body and whether you use oxidation or reduction firing. Please test in your own kiln.\u003c\/p\u003e\n\u003ch2\u003e[Frequently Asked Questions]\u003c\/h2\u003e\n\u003cdl\u003e\n\u003cdt style=\"font-weight: bold; margin-top: 15px;\"\u003eQ: How do I use the pigment?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: It arrives in a highly concentrated paste form. Please dilute it with water according to your purpose. For line drawing (outlining), a general guide is 1 part Gosu to 3 parts water. For Dami (washes), use 1 teaspoon of Gosu to 80ml-250ml of water. Please adjust to find your ideal shade.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: Should I add a binder or adhesive (like gum arabic or CMC)?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Our Gosu does not contain added binders to allow you flexibility. If the pigment is not adhering well to your bisque ware, or if your painting process requires touching the surface repeatedly, we recommend adding a small amount of your preferred binder.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: How should I store it if I won't use it for a long time?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: We recommend storing it tightly sealed in the container. If it dries out, simply add water and grind it again in a mortar to return it to a paste.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: What causes the pigment to crawl or repel during firing?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Applying the pigment too thickly is the most common cause of crawling. It can also be caused by dust or oil (from hands) on the bisque ware before painting.\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003ch2\u003e[Shipping \u0026amp; Postage (International)]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/ZGVsaXZlcnlfMWRheQ.png?cmsp_timestamp=20240605194647\" alt=\"Fast Shipping\"\u003e\u003cbr\u003eIf you place your order \u003cu\u003ebefore noon (JST)\u003c\/u\u003e, it will generally be shipped \u003cspan style=\"color: #d32f2f;\"\u003e\u003cstrong\u003e\u003cu\u003ethe next business day\u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e from our factory in Japan.\u003cbr\u003e\u003cem\u003e*If your order includes made-to-order items like specific glazes, the entire order will be shipped once all items are ready.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAbout Shipping Fees:\u003c\/strong\u003e\u003cbr\u003eShipping costs are \u003cstrong\u003eautomatically calculated at checkout\u003c\/strong\u003e based on the total weight of your order and your delivery address (Country\/Region).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAvailable Shipping Methods:\u003c\/strong\u003e\u003cbr\u003eDuring checkout, you can choose the delivery method that best suits your needs.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eEMS (Express Mail Service)\u003c\/strong\u003e: Fast and reliable with tracking, but shipping fees are higher. Typically arrives in 3 to 7 days depending on the destination.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSurface Mail (Sea Mail)\u003c\/strong\u003e: The most economical option with lower shipping fees, but delivery is slow. It typically takes 1 to 3 months to arrive.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003e*Please note that customs duties or import taxes may apply upon arrival in your country, which are the responsibility of the buyer.\u003c\/em\u003e\u003c\/p\u003e","brand":"株式会社深海商店","offers":[{"title":"Paste 100g","offer_id":49065179119907,"sku":"101390","price":2000.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0523\/0115\/files\/071___EC-min.jpg?v=1770941190"},{"product_id":"166961825","title":"Rust Gosu No.2 \/Rust Gosu 2 underglaze(100g)","description":"\u003ch2\u003e[Quality \u0026amp; Craftsmanship]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"High quality Arita blue and white porcelain\" src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/Y2FwLTE0LW1pbg.jpg?cmsp_timestamp=20240605201618\"\u003e\u003cbr\u003eFor over half a century, blue and white porcelain (Sometsuke) and Somenishiki ware created using Fukaumi Shouten's Gosu (blue underglaze) have been beloved by royalty and aristocrats worldwide, and proudly exhibited in museums.\u003cbr\u003e\u003cbr\u003e\u003cstrong style=\"color: #005bd3;\"\u003eFeatured on the BBC and Japanese National Television\u003c\/strong\u003e\u003cbr\u003eOur profound history and traditional techniques caught the attention of the world when we were featured on the prestigious UK television series, \u003cstrong\u003eBBC's \u003cem\u003e\"Great Japanese Railway Journeys\"\u003c\/em\u003e\u003c\/strong\u003e.\u003cbr\u003eIn Japan, artists utilizing our Gosu have been featured on prominent programs such as \"Wafu Souhonke\" and NHK's \"Ippin,\" which highlight the nation's finest traditional craftsmanship.\u003cbr\u003e\u003cbr\u003eOur products are also trusted for official signage at research institutions and government agencies throughout Japan. We promise to deliver this world-recognized, authentic Arita Blue directly to your studio.\u003c\/p\u003e\n\u003ch2\u003e[The Manufacturing Process]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc\/DSC01766-min.jpg?cmsp_timestamp=20221222111934\" alt=\"Gosu production process with traditional stone mill\"\u003e\u003cbr\u003eTo maintain this exceptional quality, it takes more than a month from the start of production to completion for Fukaumi Shouten's Gosu.\u003cbr\u003e\u003cbr\u003eBy combining \u003cstrong\u003e\u003cu\u003eFukaumi Shouten's unique ingredient blend\u003c\/u\u003e\u003c\/strong\u003e, \u003cstrong\u003e\u003cu\u003eour proprietary firing technique (Calcination)\u003c\/u\u003e\u003c\/strong\u003e, and \u003cstrong\u003e\u003cu\u003ethe only stone-milling technology in Japan to micro-pulverize the grains\u003c\/u\u003e\u003c\/strong\u003e, we achieve the ultimate underglaze.\u003cbr\u003e\u003cbr\u003eThrough these rigorous processes, \u003cstrong\u003e\u003cu\u003ebrushstrokes become incredibly smooth, and the Gosu is highly resistant to burning out, even at high concentrations\u003c\/u\u003e\u003c\/strong\u003e.\u003cbr\u003e\u003cstrong\u003e\u003cu\u003eYou will not need to hand-grind the pigment yourself once it arrives; it is ready to use.\u003c\/u\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003eFukaumi Shouten is the only historic Gosu manufacturer that sells its products directly online to individuals worldwide. That is why we can offer authentic, professional-grade quality directly from our factory.\u003c\/p\u003e\n\u003cdiv class=\"youtube\" style=\"margin: 30px 0;\"\u003e\u003ciframe width=\"100%\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/1myOuT9yp4s?si=J6uVaUCtCXrHTky3\" title=\"Fukaumi Shouten Gosu Manufacturing Process\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003ch2\u003e[The History of Gosu in Arita]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0yNC1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Antique Arita ware showing traditional blue underglaze\"\u003e\u003cbr\u003eThe synthetic Gosu currently used throughout Japan was developed by the Fukaumi family during the early Meiji period (late 19th century).\u003cbr\u003e\u003cbr\u003eIn 1870, the renowned German chemist Gottfried Wagener was invited to Arita.\u003cbr\u003eDr. Wagener taught Heizaemon Fukaumi and his sons, Suminosuke and Takeji, the chemical method of producing the color blue using cobalt.\u003cbr\u003e\u003cbr\u003eFollowing this, the Fukaumi family conducted extensive research and successfully developed a scientific method for producing stable Gosu.\u003cbr\u003eAs a result, vivid and reliable synthetic Gosu began to be widely used in Arita and across Japan, establishing the world-famous \"Japan Blue\".\u003cbr\u003e\u003cbr\u003ePlease experience our premium Gosu, born from centuries of history, tradition, and the power of chemistry.\u003cbr\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0zNS1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Fukaumi Shouten Gosu powder and paste\" style=\"margin-top: 15px;\"\u003e\u003c\/p\u003e\n\u003ch2\u003e[How to Use]\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Type\u003c\/strong\u003e: Suitable for both Porcelain and Stoneware\/Earthenware.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Method\u003c\/strong\u003e: Suitable for both Oxidation and Reduction firing.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOptimal Firing Temperature\u003c\/strong\u003e: 1230°C – 1300°C (2246°F – 2372°F)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e[Firing Conditions for Sample Plates]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/MjAyNDAxR09TVV9zYW1wbGVzLW1pbg.jpg?cmsp_timestamp=20240605194159\" alt=\"Gosu color sample plates fired in reduction\"\u003e\u003cbr\u003eThe color samples shown in the main product images were fired under the following conditions:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Body\u003c\/strong\u003e: Amakusa Pottery Stone (Porcelain)\u003cbr\u003e\u003cspan style=\"font-size: 0.85em; color: #666;\"\u003e(Composition: SiO2 72.04%, Al2O3 18.16%, Fe2O3 0.65%, TiO2 0.04%, CaO 0.49%, MgO 0.09%, Na2O 0.58%, K2O 3.00%, Ig.Loss 4.55%)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Temperature \u0026amp; Atmosphere\u003c\/strong\u003e: 1280°C (2336°F) \/ Reduction Firing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"color: #d32f2f; font-weight: bold; margin-top: 10px;\"\u003e*Note: The color of the underglaze will change depending on your clay body and whether you use oxidation or reduction firing. Please test in your own kiln.\u003c\/p\u003e\n\u003ch2\u003e[Frequently Asked Questions]\u003c\/h2\u003e\n\u003cdl\u003e\n\u003cdt style=\"font-weight: bold; margin-top: 15px;\"\u003eQ: How do I use the pigment?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: It arrives in a highly concentrated paste form. Please dilute it with water according to your purpose. For line drawing (outlining), a general guide is 1 part Gosu to 3 parts water. For Dami (washes), use 1 teaspoon of Gosu to 80ml-250ml of water. Please adjust to find your ideal shade.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: Should I add a binder or adhesive (like gum arabic or CMC)?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Our Gosu does not contain added binders to allow you flexibility. If the pigment is not adhering well to your bisque ware, or if your painting process requires touching the surface repeatedly, we recommend adding a small amount of your preferred binder.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: How should I store it if I won't use it for a long time?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: We recommend storing it tightly sealed in the container. If it dries out, simply add water and grind it again in a mortar to return it to a paste.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: What causes the pigment to crawl or repel during firing?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Applying the pigment too thickly is the most common cause of crawling. It can also be caused by dust or oil (from hands) on the bisque ware before painting.\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003ch2\u003e[Shipping \u0026amp; Postage (International)]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/ZGVsaXZlcnlfMWRheQ.png?cmsp_timestamp=20240605194647\" alt=\"Fast Shipping\"\u003e\u003cbr\u003eIf you place your order \u003cu\u003ebefore noon (JST)\u003c\/u\u003e, it will generally be shipped \u003cspan style=\"color: #d32f2f;\"\u003e\u003cstrong\u003e\u003cu\u003ethe next business day\u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e from our factory in Japan.\u003cbr\u003e\u003cem\u003e*If your order includes made-to-order items like specific glazes, the entire order will be shipped once all items are ready.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAbout Shipping Fees:\u003c\/strong\u003e\u003cbr\u003eShipping costs are \u003cstrong\u003eautomatically calculated at checkout\u003c\/strong\u003e based on the total weight of your order and your delivery address (Country\/Region).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAvailable Shipping Methods:\u003c\/strong\u003e\u003cbr\u003eDuring checkout, you can choose the delivery method that best suits your needs.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eEMS (Express Mail Service)\u003c\/strong\u003e: Fast and reliable with tracking, but shipping fees are higher. Typically arrives in 3 to 7 days depending on the destination.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSurface Mail (Sea Mail)\u003c\/strong\u003e: The most economical option with lower shipping fees, but delivery is slow. It typically takes 1 to 3 months to arrive.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003e*Please note that customs duties or import taxes may apply upon arrival in your country, which are the responsibility of the buyer.\u003c\/em\u003e\u003c\/p\u003e","brand":"株式会社深海商店","offers":[{"title":"Paste 100g","offer_id":49065356525859,"sku":"101380","price":1800.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0523\/0115\/files\/070__No2_EC-min.jpg?v=1723453049"},{"product_id":"166961833","title":"Old Chinese Gosu 1 underglaze(100g)","description":"\u003ch2\u003e[Quality \u0026amp; Craftsmanship]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"High quality Arita blue and white porcelain\" src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/Y2FwLTE0LW1pbg.jpg?cmsp_timestamp=20240605201618\"\u003e\u003cbr\u003eFor over half a century, blue and white porcelain (Sometsuke) and Somenishiki ware created using Fukaumi Shouten's Gosu (blue underglaze) have been beloved by royalty and aristocrats worldwide, and proudly exhibited in museums.\u003cbr\u003e\u003cbr\u003e\u003cstrong style=\"color: #005bd3;\"\u003eFeatured on the BBC and Japanese National Television\u003c\/strong\u003e\u003cbr\u003eOur profound history and traditional techniques caught the attention of the world when we were featured on the prestigious UK television series, \u003cstrong\u003eBBC's \u003cem\u003e\"Great Japanese Railway Journeys\"\u003c\/em\u003e\u003c\/strong\u003e.\u003cbr\u003eIn Japan, artists utilizing our Gosu have been featured on prominent programs such as \"Wafu Souhonke\" and NHK's \"Ippin,\" which highlight the nation's finest traditional craftsmanship.\u003cbr\u003e\u003cbr\u003eOur products are also trusted for official signage at research institutions and government agencies throughout Japan. We promise to deliver this world-recognized, authentic Arita Blue directly to your studio.\u003c\/p\u003e\n\u003ch2\u003e[The Manufacturing Process]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc\/DSC01766-min.jpg?cmsp_timestamp=20221222111934\" alt=\"Gosu production process with traditional stone mill\"\u003e\u003cbr\u003eTo maintain this exceptional quality, it takes more than a month from the start of production to completion for Fukaumi Shouten's Gosu.\u003cbr\u003e\u003cbr\u003eBy combining \u003cstrong\u003e\u003cu\u003eFukaumi Shouten's unique ingredient blend\u003c\/u\u003e\u003c\/strong\u003e, \u003cstrong\u003e\u003cu\u003eour proprietary firing technique (Calcination)\u003c\/u\u003e\u003c\/strong\u003e, and \u003cstrong\u003e\u003cu\u003ethe only stone-milling technology in Japan to micro-pulverize the grains\u003c\/u\u003e\u003c\/strong\u003e, we achieve the ultimate underglaze.\u003cbr\u003e\u003cbr\u003eThrough these rigorous processes, \u003cstrong\u003e\u003cu\u003ebrushstrokes become incredibly smooth, and the Gosu is highly resistant to burning out, even at high concentrations\u003c\/u\u003e\u003c\/strong\u003e.\u003cbr\u003e\u003cstrong\u003e\u003cu\u003eYou will not need to hand-grind the pigment yourself once it arrives; it is ready to use.\u003c\/u\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003eFukaumi Shouten is the only historic Gosu manufacturer that sells its products directly online to individuals worldwide. That is why we can offer authentic, professional-grade quality directly from our factory.\u003c\/p\u003e\n\u003cdiv class=\"youtube\" style=\"margin: 30px 0;\"\u003e\u003ciframe width=\"100%\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/1myOuT9yp4s?si=J6uVaUCtCXrHTky3\" title=\"Fukaumi Shouten Gosu Manufacturing Process\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003ch2\u003e[The History of Gosu in Arita]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0yNC1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Antique Arita ware showing traditional blue underglaze\"\u003e\u003cbr\u003eThe synthetic Gosu currently used throughout Japan was developed by the Fukaumi family during the early Meiji period (late 19th century).\u003cbr\u003e\u003cbr\u003eIn 1870, the renowned German chemist Gottfried Wagener was invited to Arita.\u003cbr\u003eDr. Wagener taught Heizaemon Fukaumi and his sons, Suminosuke and Takeji, the chemical method of producing the color blue using cobalt.\u003cbr\u003e\u003cbr\u003eFollowing this, the Fukaumi family conducted extensive research and successfully developed a scientific method for producing stable Gosu.\u003cbr\u003eAs a result, vivid and reliable synthetic Gosu began to be widely used in Arita and across Japan, establishing the world-famous \"Japan Blue\".\u003cbr\u003e\u003cbr\u003ePlease experience our premium Gosu, born from centuries of history, tradition, and the power of chemistry.\u003cbr\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0zNS1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Fukaumi Shouten Gosu powder and paste\" style=\"margin-top: 15px;\"\u003e\u003c\/p\u003e\n\u003ch2\u003e[How to Use]\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Type\u003c\/strong\u003e: Suitable for both Porcelain and Stoneware\/Earthenware.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Method\u003c\/strong\u003e: Suitable for both Oxidation and Reduction firing.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOptimal Firing Temperature\u003c\/strong\u003e: 1230°C – 1300°C (2246°F – 2372°F)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e[Firing Conditions for Sample Plates]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/MjAyNDAxR09TVV9zYW1wbGVzLW1pbg.jpg?cmsp_timestamp=20240605194159\" alt=\"Gosu color sample plates fired in reduction\"\u003e\u003cbr\u003eThe color samples shown in the main product images were fired under the following conditions:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Body\u003c\/strong\u003e: Amakusa Pottery Stone (Porcelain)\u003cbr\u003e\u003cspan style=\"font-size: 0.85em; color: #666;\"\u003e(Composition: SiO2 72.04%, Al2O3 18.16%, Fe2O3 0.65%, TiO2 0.04%, CaO 0.49%, MgO 0.09%, Na2O 0.58%, K2O 3.00%, Ig.Loss 4.55%)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Temperature \u0026amp; Atmosphere\u003c\/strong\u003e: 1280°C (2336°F) \/ Reduction Firing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"color: #d32f2f; font-weight: bold; margin-top: 10px;\"\u003e*Note: The color of the underglaze will change depending on your clay body and whether you use oxidation or reduction firing. Please test in your own kiln.\u003c\/p\u003e\n\u003ch2\u003e[Frequently Asked Questions]\u003c\/h2\u003e\n\u003cdl\u003e\n\u003cdt style=\"font-weight: bold; margin-top: 15px;\"\u003eQ: How do I use the pigment?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: It arrives in a highly concentrated paste form. Please dilute it with water according to your purpose. For line drawing (outlining), a general guide is 1 part Gosu to 3 parts water. For Dami (washes), use 1 teaspoon of Gosu to 80ml-250ml of water. Please adjust to find your ideal shade.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: Should I add a binder or adhesive (like gum arabic or CMC)?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Our Gosu does not contain added binders to allow you flexibility. If the pigment is not adhering well to your bisque ware, or if your painting process requires touching the surface repeatedly, we recommend adding a small amount of your preferred binder.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: How should I store it if I won't use it for a long time?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: We recommend storing it tightly sealed in the container. If it dries out, simply add water and grind it again in a mortar to return it to a paste.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: What causes the pigment to crawl or repel during firing?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Applying the pigment too thickly is the most common cause of crawling. It can also be caused by dust or oil (from hands) on the bisque ware before painting.\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003ch2\u003e[Shipping \u0026amp; Postage (International)]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/ZGVsaXZlcnlfMWRheQ.png?cmsp_timestamp=20240605194647\" alt=\"Fast Shipping\"\u003e\u003cbr\u003eIf you place your order \u003cu\u003ebefore noon (JST)\u003c\/u\u003e, it will generally be shipped \u003cspan style=\"color: #d32f2f;\"\u003e\u003cstrong\u003e\u003cu\u003ethe next business day\u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e from our factory in Japan.\u003cbr\u003e\u003cem\u003e*If your order includes made-to-order items like specific glazes, the entire order will be shipped once all items are ready.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAbout Shipping Fees:\u003c\/strong\u003e\u003cbr\u003eShipping costs are \u003cstrong\u003eautomatically calculated at checkout\u003c\/strong\u003e based on the total weight of your order and your delivery address (Country\/Region).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAvailable Shipping Methods:\u003c\/strong\u003e\u003cbr\u003eDuring checkout, you can choose the delivery method that best suits your needs.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eEMS (Express Mail Service)\u003c\/strong\u003e: Fast and reliable with tracking, but shipping fees are higher. Typically arrives in 3 to 7 days depending on the destination.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSurface Mail (Sea Mail)\u003c\/strong\u003e: The most economical option with lower shipping fees, but delivery is slow. It typically takes 1 to 3 months to arrive.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003e*Please note that customs duties or import taxes may apply upon arrival in your country, which are the responsibility of the buyer.\u003c\/em\u003e\u003c\/p\u003e","brand":"株式会社深海商店","offers":[{"title":"Paste 100g","offer_id":49065191342371,"sku":"100340","price":2100.0,"currency_code":"JPY","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0523\/0115\/files\/053___EC-min.jpg?v=1770941173"},{"product_id":"166961839","title":"Dark Ancient underglaze(100g)","description":"\u003ch2\u003e[Quality \u0026amp; Craftsmanship]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"High quality Arita blue and white porcelain\" src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/Y2FwLTE0LW1pbg.jpg?cmsp_timestamp=20240605201618\"\u003e\u003cbr\u003eFor over half a century, blue and white porcelain (Sometsuke) and Somenishiki ware created using Fukaumi Shouten's Gosu (blue underglaze) have been beloved by royalty and aristocrats worldwide, and proudly exhibited in museums.\u003cbr\u003e\u003cbr\u003e\u003cstrong style=\"color: #005bd3;\"\u003eFeatured on the BBC and Japanese National Television\u003c\/strong\u003e\u003cbr\u003eOur profound history and traditional techniques caught the attention of the world when we were featured on the prestigious UK television series, \u003cstrong\u003eBBC's \u003cem\u003e\"Great Japanese Railway Journeys\"\u003c\/em\u003e\u003c\/strong\u003e.\u003cbr\u003eIn Japan, artists utilizing our Gosu have been featured on prominent programs such as \"Wafu Souhonke\" and NHK's \"Ippin,\" which highlight the nation's finest traditional craftsmanship.\u003cbr\u003e\u003cbr\u003eOur products are also trusted for official signage at research institutions and government agencies throughout Japan. We promise to deliver this world-recognized, authentic Arita Blue directly to your studio.\u003c\/p\u003e\n\u003ch2\u003e[The Manufacturing Process]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc\/DSC01766-min.jpg?cmsp_timestamp=20221222111934\" alt=\"Gosu production process with traditional stone mill\"\u003e\u003cbr\u003eTo maintain this exceptional quality, it takes more than a month from the start of production to completion for Fukaumi Shouten's Gosu.\u003cbr\u003e\u003cbr\u003eBy combining \u003cstrong\u003e\u003cu\u003eFukaumi Shouten's unique ingredient blend\u003c\/u\u003e\u003c\/strong\u003e, \u003cstrong\u003e\u003cu\u003eour proprietary firing technique (Calcination)\u003c\/u\u003e\u003c\/strong\u003e, and \u003cstrong\u003e\u003cu\u003ethe only stone-milling technology in Japan to micro-pulverize the grains\u003c\/u\u003e\u003c\/strong\u003e, we achieve the ultimate underglaze.\u003cbr\u003e\u003cbr\u003eThrough these rigorous processes, \u003cstrong\u003e\u003cu\u003ebrushstrokes become incredibly smooth, and the Gosu is highly resistant to burning out, even at high concentrations\u003c\/u\u003e\u003c\/strong\u003e.\u003cbr\u003e\u003cstrong\u003e\u003cu\u003eYou will not need to hand-grind the pigment yourself once it arrives; it is ready to use.\u003c\/u\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003eFukaumi Shouten is the only historic Gosu manufacturer that sells its products directly online to individuals worldwide. That is why we can offer authentic, professional-grade quality directly from our factory.\u003c\/p\u003e\n\u003cdiv class=\"youtube\" style=\"margin: 30px 0;\"\u003e\u003ciframe width=\"100%\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/1myOuT9yp4s?si=J6uVaUCtCXrHTky3\" title=\"Fukaumi Shouten Gosu Manufacturing Process\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003ch2\u003e[The History of Gosu in Arita]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0yNC1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Antique Arita ware showing traditional blue underglaze\"\u003e\u003cbr\u003eThe synthetic Gosu currently used throughout Japan was developed by the Fukaumi family during the early Meiji period (late 19th century).\u003cbr\u003e\u003cbr\u003eIn 1870, the renowned German chemist Gottfried Wagener was invited to Arita.\u003cbr\u003eDr. Wagener taught Heizaemon Fukaumi and his sons, Suminosuke and Takeji, the chemical method of producing the color blue using cobalt.\u003cbr\u003e\u003cbr\u003eFollowing this, the Fukaumi family conducted extensive research and successfully developed a scientific method for producing stable Gosu.\u003cbr\u003eAs a result, vivid and reliable synthetic Gosu began to be widely used in Arita and across Japan, establishing the world-famous \"Japan Blue\".\u003cbr\u003e\u003cbr\u003ePlease experience our premium Gosu, born from centuries of history, tradition, and the power of chemistry.\u003cbr\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0zNS1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Fukaumi Shouten Gosu powder and paste\" style=\"margin-top: 15px;\"\u003e\u003c\/p\u003e\n\u003ch2\u003e[How to Use]\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Type\u003c\/strong\u003e: Suitable for both Porcelain and Stoneware\/Earthenware.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Method\u003c\/strong\u003e: Suitable for both Oxidation and Reduction firing.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOptimal Firing Temperature\u003c\/strong\u003e: 1230°C – 1300°C (2246°F – 2372°F)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e[Firing Conditions for Sample Plates]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/MjAyNDAxR09TVV9zYW1wbGVzLW1pbg.jpg?cmsp_timestamp=20240605194159\" alt=\"Gosu color sample plates fired in reduction\"\u003e\u003cbr\u003eThe color samples shown in the main product images were fired under the following conditions:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Body\u003c\/strong\u003e: Amakusa Pottery Stone (Porcelain)\u003cbr\u003e\u003cspan style=\"font-size: 0.85em; color: #666;\"\u003e(Composition: SiO2 72.04%, Al2O3 18.16%, Fe2O3 0.65%, TiO2 0.04%, CaO 0.49%, MgO 0.09%, Na2O 0.58%, K2O 3.00%, Ig.Loss 4.55%)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Temperature \u0026amp; Atmosphere\u003c\/strong\u003e: 1280°C (2336°F) \/ Reduction Firing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"color: #d32f2f; font-weight: bold; margin-top: 10px;\"\u003e*Note: The color of the underglaze will change depending on your clay body and whether you use oxidation or reduction firing. Please test in your own kiln.\u003c\/p\u003e\n\u003ch2\u003e[Frequently Asked Questions]\u003c\/h2\u003e\n\u003cdl\u003e\n\u003cdt style=\"font-weight: bold; margin-top: 15px;\"\u003eQ: How do I use the pigment?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: It arrives in a highly concentrated paste form. Please dilute it with water according to your purpose. For line drawing (outlining), a general guide is 1 part Gosu to 3 parts water. For Dami (washes), use 1 teaspoon of Gosu to 80ml-250ml of water. Please adjust to find your ideal shade.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: Should I add a binder or adhesive (like gum arabic or CMC)?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Our Gosu does not contain added binders to allow you flexibility. If the pigment is not adhering well to your bisque ware, or if your painting process requires touching the surface repeatedly, we recommend adding a small amount of your preferred binder.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: How should I store it if I won't use it for a long time?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: We recommend storing it tightly sealed in the container. If it dries out, simply add water and grind it again in a mortar to return it to a paste.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: What causes the pigment to crawl or repel during firing?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Applying the pigment too thickly is the most common cause of crawling. It can also be caused by dust or oil (from hands) on the bisque ware before painting.\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003ch2\u003e[Shipping \u0026amp; Postage (International)]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/ZGVsaXZlcnlfMWRheQ.png?cmsp_timestamp=20240605194647\" alt=\"Fast Shipping\"\u003e\u003cbr\u003eIf you place your order \u003cu\u003ebefore noon (JST)\u003c\/u\u003e, it will generally be shipped \u003cspan style=\"color: #d32f2f;\"\u003e\u003cstrong\u003e\u003cu\u003ethe next business day\u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e from our factory in Japan.\u003cbr\u003e\u003cem\u003e*If your order includes made-to-order items like specific glazes, the entire order will be shipped once all items are ready.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAbout Shipping Fees:\u003c\/strong\u003e\u003cbr\u003eShipping costs are \u003cstrong\u003eautomatically calculated at checkout\u003c\/strong\u003e based on the total weight of your order and your delivery address (Country\/Region).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAvailable Shipping Methods:\u003c\/strong\u003e\u003cbr\u003eDuring checkout, you can choose the delivery method that best suits your needs.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eEMS (Express Mail Service)\u003c\/strong\u003e: Fast and reliable with tracking, but shipping fees are higher. Typically arrives in 3 to 7 days depending on the destination.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSurface Mail (Sea Mail)\u003c\/strong\u003e: The most economical option with lower shipping fees, but delivery is slow. It typically takes 1 to 3 months to arrive.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003e*Please note that customs duties or import taxes may apply upon arrival in your country, which are the responsibility of the buyer.\u003c\/em\u003e\u003c\/p\u003e","brand":"株式会社深海商店","offers":[{"title":"Paste 100g","offer_id":49065227714851,"sku":"100230","price":2000.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0523\/0115\/files\/051___EC-min.jpg?v=1723451521"},{"product_id":"166961851","title":"Ink Ancient Gosu underglaze(100g)","description":"\u003ch2\u003e[Quality \u0026amp; Craftsmanship]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"High quality Arita blue and white porcelain\" src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/Y2FwLTE0LW1pbg.jpg?cmsp_timestamp=20240605201618\"\u003e\u003cbr\u003eFor over half a century, blue and white porcelain (Sometsuke) and Somenishiki ware created using Fukaumi Shouten's Gosu (blue underglaze) have been beloved by royalty and aristocrats worldwide, and proudly exhibited in museums.\u003cbr\u003e\u003cbr\u003e\u003cstrong style=\"color: #005bd3;\"\u003eFeatured on the BBC and Japanese National Television\u003c\/strong\u003e\u003cbr\u003eOur profound history and traditional techniques caught the attention of the world when we were featured on the prestigious UK television series, \u003cstrong\u003eBBC's \u003cem\u003e\"Great Japanese Railway Journeys\"\u003c\/em\u003e\u003c\/strong\u003e.\u003cbr\u003eIn Japan, artists utilizing our Gosu have been featured on prominent programs such as \"Wafu Souhonke\" and NHK's \"Ippin,\" which highlight the nation's finest traditional craftsmanship.\u003cbr\u003e\u003cbr\u003eOur products are also trusted for official signage at research institutions and government agencies throughout Japan. We promise to deliver this world-recognized, authentic Arita Blue directly to your studio.\u003c\/p\u003e\n\u003ch2\u003e[The Manufacturing Process]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc\/DSC01766-min.jpg?cmsp_timestamp=20221222111934\" alt=\"Gosu production process with traditional stone mill\"\u003e\u003cbr\u003eTo maintain this exceptional quality, it takes more than a month from the start of production to completion for Fukaumi Shouten's Gosu.\u003cbr\u003e\u003cbr\u003eBy combining \u003cstrong\u003e\u003cu\u003eFukaumi Shouten's unique ingredient blend\u003c\/u\u003e\u003c\/strong\u003e, \u003cstrong\u003e\u003cu\u003eour proprietary firing technique (Calcination)\u003c\/u\u003e\u003c\/strong\u003e, and \u003cstrong\u003e\u003cu\u003ethe only stone-milling technology in Japan to micro-pulverize the grains\u003c\/u\u003e\u003c\/strong\u003e, we achieve the ultimate underglaze.\u003cbr\u003e\u003cbr\u003eThrough these rigorous processes, \u003cstrong\u003e\u003cu\u003ebrushstrokes become incredibly smooth, and the Gosu is highly resistant to burning out, even at high concentrations\u003c\/u\u003e\u003c\/strong\u003e.\u003cbr\u003e\u003cstrong\u003e\u003cu\u003eYou will not need to hand-grind the pigment yourself once it arrives; it is ready to use.\u003c\/u\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003eFukaumi Shouten is the only historic Gosu manufacturer that sells its products directly online to individuals worldwide. That is why we can offer authentic, professional-grade quality directly from our factory.\u003c\/p\u003e\n\u003cdiv class=\"youtube\" style=\"margin: 30px 0;\"\u003e\u003ciframe width=\"100%\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/1myOuT9yp4s?si=J6uVaUCtCXrHTky3\" title=\"Fukaumi Shouten Gosu Manufacturing Process\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003ch2\u003e[The History of Gosu in Arita]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0yNC1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Antique Arita ware showing traditional blue underglaze\"\u003e\u003cbr\u003eThe synthetic Gosu currently used throughout Japan was developed by the Fukaumi family during the early Meiji period (late 19th century).\u003cbr\u003e\u003cbr\u003eIn 1870, the renowned German chemist Gottfried Wagener was invited to Arita.\u003cbr\u003eDr. Wagener taught Heizaemon Fukaumi and his sons, Suminosuke and Takeji, the chemical method of producing the color blue using cobalt.\u003cbr\u003e\u003cbr\u003eFollowing this, the Fukaumi family conducted extensive research and successfully developed a scientific method for producing stable Gosu.\u003cbr\u003eAs a result, vivid and reliable synthetic Gosu began to be widely used in Arita and across Japan, establishing the world-famous \"Japan Blue\".\u003cbr\u003e\u003cbr\u003ePlease experience our premium Gosu, born from centuries of history, tradition, and the power of chemistry.\u003cbr\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0zNS1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Fukaumi Shouten Gosu powder and paste\" style=\"margin-top: 15px;\"\u003e\u003c\/p\u003e\n\u003ch2\u003e[How to Use]\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Type\u003c\/strong\u003e: Suitable for both Porcelain and Stoneware\/Earthenware.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Method\u003c\/strong\u003e: Suitable for both Oxidation and Reduction firing.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOptimal Firing Temperature\u003c\/strong\u003e: 1230°C – 1300°C (2246°F – 2372°F)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e[Firing Conditions for Sample Plates]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/MjAyNDAxR09TVV9zYW1wbGVzLW1pbg.jpg?cmsp_timestamp=20240605194159\" alt=\"Gosu color sample plates fired in reduction\"\u003e\u003cbr\u003eThe color samples shown in the main product images were fired under the following conditions:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Body\u003c\/strong\u003e: Amakusa Pottery Stone (Porcelain)\u003cbr\u003e\u003cspan style=\"font-size: 0.85em; color: #666;\"\u003e(Composition: SiO2 72.04%, Al2O3 18.16%, Fe2O3 0.65%, TiO2 0.04%, CaO 0.49%, MgO 0.09%, Na2O 0.58%, K2O 3.00%, Ig.Loss 4.55%)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Temperature \u0026amp; Atmosphere\u003c\/strong\u003e: 1280°C (2336°F) \/ Reduction Firing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"color: #d32f2f; font-weight: bold; margin-top: 10px;\"\u003e*Note: The color of the underglaze will change depending on your clay body and whether you use oxidation or reduction firing. Please test in your own kiln.\u003c\/p\u003e\n\u003ch2\u003e[Frequently Asked Questions]\u003c\/h2\u003e\n\u003cdl\u003e\n\u003cdt style=\"font-weight: bold; margin-top: 15px;\"\u003eQ: How do I use the pigment?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: It arrives in a highly concentrated paste form. Please dilute it with water according to your purpose. For line drawing (outlining), a general guide is 1 part Gosu to 3 parts water. For Dami (washes), use 1 teaspoon of Gosu to 80ml-250ml of water. Please adjust to find your ideal shade.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: Should I add a binder or adhesive (like gum arabic or CMC)?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Our Gosu does not contain added binders to allow you flexibility. If the pigment is not adhering well to your bisque ware, or if your painting process requires touching the surface repeatedly, we recommend adding a small amount of your preferred binder.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: How should I store it if I won't use it for a long time?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: We recommend storing it tightly sealed in the container. If it dries out, simply add water and grind it again in a mortar to return it to a paste.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: What causes the pigment to crawl or repel during firing?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Applying the pigment too thickly is the most common cause of crawling. It can also be caused by dust or oil (from hands) on the bisque ware before painting.\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003ch2\u003e[Shipping \u0026amp; Postage (International)]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/ZGVsaXZlcnlfMWRheQ.png?cmsp_timestamp=20240605194647\" alt=\"Fast Shipping\"\u003e\u003cbr\u003eIf you place your order \u003cu\u003ebefore noon (JST)\u003c\/u\u003e, it will generally be shipped \u003cspan style=\"color: #d32f2f;\"\u003e\u003cstrong\u003e\u003cu\u003ethe next business day\u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e from our factory in Japan.\u003cbr\u003e\u003cem\u003e*If your order includes made-to-order items like specific glazes, the entire order will be shipped once all items are ready.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAbout Shipping Fees:\u003c\/strong\u003e\u003cbr\u003eShipping costs are \u003cstrong\u003eautomatically calculated at checkout\u003c\/strong\u003e based on the total weight of your order and your delivery address (Country\/Region).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAvailable Shipping Methods:\u003c\/strong\u003e\u003cbr\u003eDuring checkout, you can choose the delivery method that best suits your needs.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eEMS (Express Mail Service)\u003c\/strong\u003e: Fast and reliable with tracking, but shipping fees are higher. Typically arrives in 3 to 7 days depending on the destination.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSurface Mail (Sea Mail)\u003c\/strong\u003e: The most economical option with lower shipping fees, but delivery is slow. It typically takes 1 to 3 months to arrive.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003e*Please note that customs duties or import taxes may apply upon arrival in your country, which are the responsibility of the buyer.\u003c\/em\u003e\u003c\/p\u003e","brand":"株式会社深海商店","offers":[{"title":"Paste 100g","offer_id":49065183052067,"sku":"100520","price":2200.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0523\/0115\/files\/061___EC-min.jpg?v=1770941157"},{"product_id":"166961861","title":"Dark Ancient underglaze(100g)","description":"\u003ch2\u003e[Quality \u0026amp; Craftsmanship]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"High quality Arita blue and white porcelain\" src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/Y2FwLTE0LW1pbg.jpg?cmsp_timestamp=20240605201618\"\u003e\u003cbr\u003eFor over half a century, blue and white porcelain (Sometsuke) and Somenishiki ware created using Fukaumi Shouten's Gosu (blue underglaze) have been beloved by royalty and aristocrats worldwide, and proudly exhibited in museums.\u003cbr\u003e\u003cbr\u003e\u003cstrong style=\"color: #005bd3;\"\u003eFeatured on the BBC and Japanese National Television\u003c\/strong\u003e\u003cbr\u003eOur profound history and traditional techniques caught the attention of the world when we were featured on the prestigious UK television series, \u003cstrong\u003eBBC's \u003cem\u003e\"Great Japanese Railway Journeys\"\u003c\/em\u003e\u003c\/strong\u003e.\u003cbr\u003eIn Japan, artists utilizing our Gosu have been featured on prominent programs such as \"Wafu Souhonke\" and NHK's \"Ippin,\" which highlight the nation's finest traditional craftsmanship.\u003cbr\u003e\u003cbr\u003eOur products are also trusted for official signage at research institutions and government agencies throughout Japan. We promise to deliver this world-recognized, authentic Arita Blue directly to your studio.\u003c\/p\u003e\n\u003ch2\u003e[The Manufacturing Process]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc\/DSC01766-min.jpg?cmsp_timestamp=20221222111934\" alt=\"Gosu production process with traditional stone mill\"\u003e\u003cbr\u003eTo maintain this exceptional quality, it takes more than a month from the start of production to completion for Fukaumi Shouten's Gosu.\u003cbr\u003e\u003cbr\u003eBy combining \u003cstrong\u003e\u003cu\u003eFukaumi Shouten's unique ingredient blend\u003c\/u\u003e\u003c\/strong\u003e, \u003cstrong\u003e\u003cu\u003eour proprietary firing technique (Calcination)\u003c\/u\u003e\u003c\/strong\u003e, and \u003cstrong\u003e\u003cu\u003ethe only stone-milling technology in Japan to micro-pulverize the grains\u003c\/u\u003e\u003c\/strong\u003e, we achieve the ultimate underglaze.\u003cbr\u003e\u003cbr\u003eThrough these rigorous processes, \u003cstrong\u003e\u003cu\u003ebrushstrokes become incredibly smooth, and the Gosu is highly resistant to burning out, even at high concentrations\u003c\/u\u003e\u003c\/strong\u003e.\u003cbr\u003e\u003cstrong\u003e\u003cu\u003eYou will not need to hand-grind the pigment yourself once it arrives; it is ready to use.\u003c\/u\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003eFukaumi Shouten is the only historic Gosu manufacturer that sells its products directly online to individuals worldwide. That is why we can offer authentic, professional-grade quality directly from our factory.\u003c\/p\u003e\n\u003cdiv class=\"youtube\" style=\"margin: 30px 0;\"\u003e\u003ciframe width=\"100%\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/1myOuT9yp4s?si=J6uVaUCtCXrHTky3\" title=\"Fukaumi Shouten Gosu Manufacturing Process\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003ch2\u003e[The History of Gosu in Arita]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0yNC1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Antique Arita ware showing traditional blue underglaze\"\u003e\u003cbr\u003eThe synthetic Gosu currently used throughout Japan was developed by the Fukaumi family during the early Meiji period (late 19th century).\u003cbr\u003e\u003cbr\u003eIn 1870, the renowned German chemist Gottfried Wagener was invited to Arita.\u003cbr\u003eDr. Wagener taught Heizaemon Fukaumi and his sons, Suminosuke and Takeji, the chemical method of producing the color blue using cobalt.\u003cbr\u003e\u003cbr\u003eFollowing this, the Fukaumi family conducted extensive research and successfully developed a scientific method for producing stable Gosu.\u003cbr\u003eAs a result, vivid and reliable synthetic Gosu began to be widely used in Arita and across Japan, establishing the world-famous \"Japan Blue\".\u003cbr\u003e\u003cbr\u003ePlease experience our premium Gosu, born from centuries of history, tradition, and the power of chemistry.\u003cbr\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0zNS1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Fukaumi Shouten Gosu powder and paste\" style=\"margin-top: 15px;\"\u003e\u003c\/p\u003e\n\u003ch2\u003e[How to Use]\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Type\u003c\/strong\u003e: Suitable for both Porcelain and Stoneware\/Earthenware.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Method\u003c\/strong\u003e: Suitable for both Oxidation and Reduction firing.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOptimal Firing Temperature\u003c\/strong\u003e: 1230°C – 1300°C (2246°F – 2372°F)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e[Firing Conditions for Sample Plates]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/MjAyNDAxR09TVV9zYW1wbGVzLW1pbg.jpg?cmsp_timestamp=20240605194159\" alt=\"Gosu color sample plates fired in reduction\"\u003e\u003cbr\u003eThe color samples shown in the main product images were fired under the following conditions:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Body\u003c\/strong\u003e: Amakusa Pottery Stone (Porcelain)\u003cbr\u003e\u003cspan style=\"font-size: 0.85em; color: #666;\"\u003e(Composition: SiO2 72.04%, Al2O3 18.16%, Fe2O3 0.65%, TiO2 0.04%, CaO 0.49%, MgO 0.09%, Na2O 0.58%, K2O 3.00%, Ig.Loss 4.55%)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Temperature \u0026amp; Atmosphere\u003c\/strong\u003e: 1280°C (2336°F) \/ Reduction Firing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"color: #d32f2f; font-weight: bold; margin-top: 10px;\"\u003e*Note: The color of the underglaze will change depending on your clay body and whether you use oxidation or reduction firing. Please test in your own kiln.\u003c\/p\u003e\n\u003ch2\u003e[Frequently Asked Questions]\u003c\/h2\u003e\n\u003cdl\u003e\n\u003cdt style=\"font-weight: bold; margin-top: 15px;\"\u003eQ: How do I use the pigment?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: It arrives in a highly concentrated paste form. Please dilute it with water according to your purpose. For line drawing (outlining), a general guide is 1 part Gosu to 3 parts water. For Dami (washes), use 1 teaspoon of Gosu to 80ml-250ml of water. Please adjust to find your ideal shade.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: Should I add a binder or adhesive (like gum arabic or CMC)?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Our Gosu does not contain added binders to allow you flexibility. If the pigment is not adhering well to your bisque ware, or if your painting process requires touching the surface repeatedly, we recommend adding a small amount of your preferred binder.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: How should I store it if I won't use it for a long time?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: We recommend storing it tightly sealed in the container. If it dries out, simply add water and grind it again in a mortar to return it to a paste.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: What causes the pigment to crawl or repel during firing?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Applying the pigment too thickly is the most common cause of crawling. It can also be caused by dust or oil (from hands) on the bisque ware before painting.\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003ch2\u003e[Shipping \u0026amp; Postage (International)]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/ZGVsaXZlcnlfMWRheQ.png?cmsp_timestamp=20240605194647\" alt=\"Fast Shipping\"\u003e\u003cbr\u003eIf you place your order \u003cu\u003ebefore noon (JST)\u003c\/u\u003e, it will generally be shipped \u003cspan style=\"color: #d32f2f;\"\u003e\u003cstrong\u003e\u003cu\u003ethe next business day\u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e from our factory in Japan.\u003cbr\u003e\u003cem\u003e*If your order includes made-to-order items like specific glazes, the entire order will be shipped once all items are ready.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAbout Shipping Fees:\u003c\/strong\u003e\u003cbr\u003eShipping costs are \u003cstrong\u003eautomatically calculated at checkout\u003c\/strong\u003e based on the total weight of your order and your delivery address (Country\/Region).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAvailable Shipping Methods:\u003c\/strong\u003e\u003cbr\u003eDuring checkout, you can choose the delivery method that best suits your needs.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eEMS (Express Mail Service)\u003c\/strong\u003e: Fast and reliable with tracking, but shipping fees are higher. Typically arrives in 3 to 7 days depending on the destination.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSurface Mail (Sea Mail)\u003c\/strong\u003e: The most economical option with lower shipping fees, but delivery is slow. It typically takes 1 to 3 months to arrive.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003e*Please note that customs duties or import taxes may apply upon arrival in your country, which are the responsibility of the buyer.\u003c\/em\u003e\u003c\/p\u003e","brand":"株式会社深海商店","offers":[{"title":"Paste 100g","offer_id":49065239183651,"sku":"100240","price":2700.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0523\/0115\/files\/052___EC-min.jpg?v=1723451633"},{"product_id":"166961869","title":"Kyo Imperial 2 underglaze(100g)","description":"\u003ch2\u003e[Quality \u0026amp; Craftsmanship]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"High quality Arita blue and white porcelain\" src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/Y2FwLTE0LW1pbg.jpg?cmsp_timestamp=20240605201618\"\u003e\u003cbr\u003eFor over half a century, blue and white porcelain (Sometsuke) and Somenishiki ware created using Fukaumi Shouten's Gosu (blue underglaze) have been beloved by royalty and aristocrats worldwide, and proudly exhibited in museums.\u003cbr\u003e\u003cbr\u003e\u003cstrong style=\"color: #005bd3;\"\u003eFeatured on the BBC and Japanese National Television\u003c\/strong\u003e\u003cbr\u003eOur profound history and traditional techniques caught the attention of the world when we were featured on the prestigious UK television series, \u003cstrong\u003eBBC's \u003cem\u003e\"Great Japanese Railway Journeys\"\u003c\/em\u003e\u003c\/strong\u003e.\u003cbr\u003eIn Japan, artists utilizing our Gosu have been featured on prominent programs such as \"Wafu Souhonke\" and NHK's \"Ippin,\" which highlight the nation's finest traditional craftsmanship.\u003cbr\u003e\u003cbr\u003eOur products are also trusted for official signage at research institutions and government agencies throughout Japan. We promise to deliver this world-recognized, authentic Arita Blue directly to your studio.\u003c\/p\u003e\n\u003ch2\u003e[The Manufacturing Process]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc\/DSC01766-min.jpg?cmsp_timestamp=20221222111934\" alt=\"Gosu production process with traditional stone mill\"\u003e\u003cbr\u003eTo maintain this exceptional quality, it takes more than a month from the start of production to completion for Fukaumi Shouten's Gosu.\u003cbr\u003e\u003cbr\u003eBy combining \u003cstrong\u003e\u003cu\u003eFukaumi Shouten's unique ingredient blend\u003c\/u\u003e\u003c\/strong\u003e, \u003cstrong\u003e\u003cu\u003eour proprietary firing technique (Calcination)\u003c\/u\u003e\u003c\/strong\u003e, and \u003cstrong\u003e\u003cu\u003ethe only stone-milling technology in Japan to micro-pulverize the grains\u003c\/u\u003e\u003c\/strong\u003e, we achieve the ultimate underglaze.\u003cbr\u003e\u003cbr\u003eThrough these rigorous processes, \u003cstrong\u003e\u003cu\u003ebrushstrokes become incredibly smooth, and the Gosu is highly resistant to burning out, even at high concentrations\u003c\/u\u003e\u003c\/strong\u003e.\u003cbr\u003e\u003cstrong\u003e\u003cu\u003eYou will not need to hand-grind the pigment yourself once it arrives; it is ready to use.\u003c\/u\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003eFukaumi Shouten is the only historic Gosu manufacturer that sells its products directly online to individuals worldwide. That is why we can offer authentic, professional-grade quality directly from our factory.\u003c\/p\u003e\n\u003cdiv class=\"youtube\" style=\"margin: 30px 0;\"\u003e\u003ciframe width=\"100%\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/1myOuT9yp4s?si=J6uVaUCtCXrHTky3\" title=\"Fukaumi Shouten Gosu Manufacturing Process\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003ch2\u003e[The History of Gosu in Arita]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0yNC1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Antique Arita ware showing traditional blue underglaze\"\u003e\u003cbr\u003eThe synthetic Gosu currently used throughout Japan was developed by the Fukaumi family during the early Meiji period (late 19th century).\u003cbr\u003e\u003cbr\u003eIn 1870, the renowned German chemist Gottfried Wagener was invited to Arita.\u003cbr\u003eDr. Wagener taught Heizaemon Fukaumi and his sons, Suminosuke and Takeji, the chemical method of producing the color blue using cobalt.\u003cbr\u003e\u003cbr\u003eFollowing this, the Fukaumi family conducted extensive research and successfully developed a scientific method for producing stable Gosu.\u003cbr\u003eAs a result, vivid and reliable synthetic Gosu began to be widely used in Arita and across Japan, establishing the world-famous \"Japan Blue\".\u003cbr\u003e\u003cbr\u003ePlease experience our premium Gosu, born from centuries of history, tradition, and the power of chemistry.\u003cbr\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0zNS1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Fukaumi Shouten Gosu powder and paste\" style=\"margin-top: 15px;\"\u003e\u003c\/p\u003e\n\u003ch2\u003e[How to Use]\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Type\u003c\/strong\u003e: Suitable for both Porcelain and Stoneware\/Earthenware.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Method\u003c\/strong\u003e: Suitable for both Oxidation and Reduction firing.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOptimal Firing Temperature\u003c\/strong\u003e: 1230°C – 1300°C (2246°F – 2372°F)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e[Firing Conditions for Sample Plates]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/MjAyNDAxR09TVV9zYW1wbGVzLW1pbg.jpg?cmsp_timestamp=20240605194159\" alt=\"Gosu color sample plates fired in reduction\"\u003e\u003cbr\u003eThe color samples shown in the main product images were fired under the following conditions:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Body\u003c\/strong\u003e: Amakusa Pottery Stone (Porcelain)\u003cbr\u003e\u003cspan style=\"font-size: 0.85em; color: #666;\"\u003e(Composition: SiO2 72.04%, Al2O3 18.16%, Fe2O3 0.65%, TiO2 0.04%, CaO 0.49%, MgO 0.09%, Na2O 0.58%, K2O 3.00%, Ig.Loss 4.55%)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Temperature \u0026amp; Atmosphere\u003c\/strong\u003e: 1280°C (2336°F) \/ Reduction Firing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"color: #d32f2f; font-weight: bold; margin-top: 10px;\"\u003e*Note: The color of the underglaze will change depending on your clay body and whether you use oxidation or reduction firing. Please test in your own kiln.\u003c\/p\u003e\n\u003ch2\u003e[Frequently Asked Questions]\u003c\/h2\u003e\n\u003cdl\u003e\n\u003cdt style=\"font-weight: bold; margin-top: 15px;\"\u003eQ: How do I use the pigment?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: It arrives in a highly concentrated paste form. Please dilute it with water according to your purpose. For line drawing (outlining), a general guide is 1 part Gosu to 3 parts water. For Dami (washes), use 1 teaspoon of Gosu to 80ml-250ml of water. Please adjust to find your ideal shade.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: Should I add a binder or adhesive (like gum arabic or CMC)?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Our Gosu does not contain added binders to allow you flexibility. If the pigment is not adhering well to your bisque ware, or if your painting process requires touching the surface repeatedly, we recommend adding a small amount of your preferred binder.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: How should I store it if I won't use it for a long time?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: We recommend storing it tightly sealed in the container. If it dries out, simply add water and grind it again in a mortar to return it to a paste.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: What causes the pigment to crawl or repel during firing?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Applying the pigment too thickly is the most common cause of crawling. It can also be caused by dust or oil (from hands) on the bisque ware before painting.\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003ch2\u003e[Shipping \u0026amp; Postage (International)]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/ZGVsaXZlcnlfMWRheQ.png?cmsp_timestamp=20240605194647\" alt=\"Fast Shipping\"\u003e\u003cbr\u003eIf you place your order \u003cu\u003ebefore noon (JST)\u003c\/u\u003e, it will generally be shipped \u003cspan style=\"color: #d32f2f;\"\u003e\u003cstrong\u003e\u003cu\u003ethe next business day\u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e from our factory in Japan.\u003cbr\u003e\u003cem\u003e*If your order includes made-to-order items like specific glazes, the entire order will be shipped once all items are ready.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAbout Shipping Fees:\u003c\/strong\u003e\u003cbr\u003eShipping costs are \u003cstrong\u003eautomatically calculated at checkout\u003c\/strong\u003e based on the total weight of your order and your delivery address (Country\/Region).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAvailable Shipping Methods:\u003c\/strong\u003e\u003cbr\u003eDuring checkout, you can choose the delivery method that best suits your needs.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eEMS (Express Mail Service)\u003c\/strong\u003e: Fast and reliable with tracking, but shipping fees are higher. Typically arrives in 3 to 7 days depending on the destination.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSurface Mail (Sea Mail)\u003c\/strong\u003e: The most economical option with lower shipping fees, but delivery is slow. It typically takes 1 to 3 months to arrive.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003e*Please note that customs duties or import taxes may apply upon arrival in your country, which are the responsibility of the buyer.\u003c\/em\u003e\u003c\/p\u003e","brand":"株式会社深海商店","offers":[{"title":"Paste 100g","offer_id":49065036349731,"sku":"100320","price":2100.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0523\/0115\/files\/029___EC-min.jpg?v=1770941139"},{"product_id":"166961876","title":"Kyo Imperial 3 underglaze(100g)","description":"\u003ch2\u003e[Quality \u0026amp; Craftsmanship]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"High quality Arita blue and white porcelain\" src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/Y2FwLTE0LW1pbg.jpg?cmsp_timestamp=20240605201618\"\u003e\u003cbr\u003eFor over half a century, blue and white porcelain (Sometsuke) and Somenishiki ware created using Fukaumi Shouten's Gosu (blue underglaze) have been beloved by royalty and aristocrats worldwide, and proudly exhibited in museums.\u003cbr\u003e\u003cbr\u003e\u003cstrong style=\"color: #005bd3;\"\u003eFeatured on the BBC and Japanese National Television\u003c\/strong\u003e\u003cbr\u003eOur profound history and traditional techniques caught the attention of the world when we were featured on the prestigious UK television series, \u003cstrong\u003eBBC's \u003cem\u003e\"Great Japanese Railway Journeys\"\u003c\/em\u003e\u003c\/strong\u003e.\u003cbr\u003eIn Japan, artists utilizing our Gosu have been featured on prominent programs such as \"Wafu Souhonke\" and NHK's \"Ippin,\" which highlight the nation's finest traditional craftsmanship.\u003cbr\u003e\u003cbr\u003eOur products are also trusted for official signage at research institutions and government agencies throughout Japan. We promise to deliver this world-recognized, authentic Arita Blue directly to your studio.\u003c\/p\u003e\n\u003ch2\u003e[The Manufacturing Process]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc\/DSC01766-min.jpg?cmsp_timestamp=20221222111934\" alt=\"Gosu production process with traditional stone mill\"\u003e\u003cbr\u003eTo maintain this exceptional quality, it takes more than a month from the start of production to completion for Fukaumi Shouten's Gosu.\u003cbr\u003e\u003cbr\u003eBy combining \u003cstrong\u003e\u003cu\u003eFukaumi Shouten's unique ingredient blend\u003c\/u\u003e\u003c\/strong\u003e, \u003cstrong\u003e\u003cu\u003eour proprietary firing technique (Calcination)\u003c\/u\u003e\u003c\/strong\u003e, and \u003cstrong\u003e\u003cu\u003ethe only stone-milling technology in Japan to micro-pulverize the grains\u003c\/u\u003e\u003c\/strong\u003e, we achieve the ultimate underglaze.\u003cbr\u003e\u003cbr\u003eThrough these rigorous processes, \u003cstrong\u003e\u003cu\u003ebrushstrokes become incredibly smooth, and the Gosu is highly resistant to burning out, even at high concentrations\u003c\/u\u003e\u003c\/strong\u003e.\u003cbr\u003e\u003cstrong\u003e\u003cu\u003eYou will not need to hand-grind the pigment yourself once it arrives; it is ready to use.\u003c\/u\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003eFukaumi Shouten is the only historic Gosu manufacturer that sells its products directly online to individuals worldwide. That is why we can offer authentic, professional-grade quality directly from our factory.\u003c\/p\u003e\n\u003cdiv class=\"youtube\" style=\"margin: 30px 0;\"\u003e\u003ciframe width=\"100%\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/1myOuT9yp4s?si=J6uVaUCtCXrHTky3\" title=\"Fukaumi Shouten Gosu Manufacturing Process\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003ch2\u003e[The History of Gosu in Arita]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0yNC1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Antique Arita ware showing traditional blue underglaze\"\u003e\u003cbr\u003eThe synthetic Gosu currently used throughout Japan was developed by the Fukaumi family during the early Meiji period (late 19th century).\u003cbr\u003e\u003cbr\u003eIn 1870, the renowned German chemist Gottfried Wagener was invited to Arita.\u003cbr\u003eDr. Wagener taught Heizaemon Fukaumi and his sons, Suminosuke and Takeji, the chemical method of producing the color blue using cobalt.\u003cbr\u003e\u003cbr\u003eFollowing this, the Fukaumi family conducted extensive research and successfully developed a scientific method for producing stable Gosu.\u003cbr\u003eAs a result, vivid and reliable synthetic Gosu began to be widely used in Arita and across Japan, establishing the world-famous \"Japan Blue\".\u003cbr\u003e\u003cbr\u003ePlease experience our premium Gosu, born from centuries of history, tradition, and the power of chemistry.\u003cbr\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0zNS1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Fukaumi Shouten Gosu powder and paste\" style=\"margin-top: 15px;\"\u003e\u003c\/p\u003e\n\u003ch2\u003e[How to Use]\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Type\u003c\/strong\u003e: Suitable for both Porcelain and Stoneware\/Earthenware.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Method\u003c\/strong\u003e: Suitable for both Oxidation and Reduction firing.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOptimal Firing Temperature\u003c\/strong\u003e: 1230°C – 1300°C (2246°F – 2372°F)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e[Firing Conditions for Sample Plates]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/MjAyNDAxR09TVV9zYW1wbGVzLW1pbg.jpg?cmsp_timestamp=20240605194159\" alt=\"Gosu color sample plates fired in reduction\"\u003e\u003cbr\u003eThe color samples shown in the main product images were fired under the following conditions:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Body\u003c\/strong\u003e: Amakusa Pottery Stone (Porcelain)\u003cbr\u003e\u003cspan style=\"font-size: 0.85em; color: #666;\"\u003e(Composition: SiO2 72.04%, Al2O3 18.16%, Fe2O3 0.65%, TiO2 0.04%, CaO 0.49%, MgO 0.09%, Na2O 0.58%, K2O 3.00%, Ig.Loss 4.55%)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Temperature \u0026amp; Atmosphere\u003c\/strong\u003e: 1280°C (2336°F) \/ Reduction Firing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"color: #d32f2f; font-weight: bold; margin-top: 10px;\"\u003e*Note: The color of the underglaze will change depending on your clay body and whether you use oxidation or reduction firing. Please test in your own kiln.\u003c\/p\u003e\n\u003ch2\u003e[Frequently Asked Questions]\u003c\/h2\u003e\n\u003cdl\u003e\n\u003cdt style=\"font-weight: bold; margin-top: 15px;\"\u003eQ: How do I use the pigment?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: It arrives in a highly concentrated paste form. Please dilute it with water according to your purpose. For line drawing (outlining), a general guide is 1 part Gosu to 3 parts water. For Dami (washes), use 1 teaspoon of Gosu to 80ml-250ml of water. Please adjust to find your ideal shade.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: Should I add a binder or adhesive (like gum arabic or CMC)?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Our Gosu does not contain added binders to allow you flexibility. If the pigment is not adhering well to your bisque ware, or if your painting process requires touching the surface repeatedly, we recommend adding a small amount of your preferred binder.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: How should I store it if I won't use it for a long time?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: We recommend storing it tightly sealed in the container. If it dries out, simply add water and grind it again in a mortar to return it to a paste.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: What causes the pigment to crawl or repel during firing?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Applying the pigment too thickly is the most common cause of crawling. It can also be caused by dust or oil (from hands) on the bisque ware before painting.\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003ch2\u003e[Shipping \u0026amp; Postage (International)]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/ZGVsaXZlcnlfMWRheQ.png?cmsp_timestamp=20240605194647\" alt=\"Fast Shipping\"\u003e\u003cbr\u003eIf you place your order \u003cu\u003ebefore noon (JST)\u003c\/u\u003e, it will generally be shipped \u003cspan style=\"color: #d32f2f;\"\u003e\u003cstrong\u003e\u003cu\u003ethe next business day\u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e from our factory in Japan.\u003cbr\u003e\u003cem\u003e*If your order includes made-to-order items like specific glazes, the entire order will be shipped once all items are ready.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAbout Shipping Fees:\u003c\/strong\u003e\u003cbr\u003eShipping costs are \u003cstrong\u003eautomatically calculated at checkout\u003c\/strong\u003e based on the total weight of your order and your delivery address (Country\/Region).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAvailable Shipping Methods:\u003c\/strong\u003e\u003cbr\u003eDuring checkout, you can choose the delivery method that best suits your needs.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eEMS (Express Mail Service)\u003c\/strong\u003e: Fast and reliable with tracking, but shipping fees are higher. Typically arrives in 3 to 7 days depending on the destination.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSurface Mail (Sea Mail)\u003c\/strong\u003e: The most economical option with lower shipping fees, but delivery is slow. It typically takes 1 to 3 months to arrive.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003e*Please note that customs duties or import taxes may apply upon arrival in your country, which are the responsibility of the buyer.\u003c\/em\u003e\u003c\/p\u003e","brand":"株式会社深海商店","offers":[{"title":"Paste 100g","offer_id":49065028682019,"sku":"100330","price":2100.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0523\/0115\/files\/030___EC-min.jpg?v=1770941112"},{"product_id":"166961926","title":"Ink Gosu in Toku underglaze (100g)","description":"\u003ch2\u003e[Quality \u0026amp; Craftsmanship]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"High quality Arita blue and white porcelain\" src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/Y2FwLTE0LW1pbg.jpg?cmsp_timestamp=20240605201618\"\u003e\u003cbr\u003eFor over half a century, blue and white porcelain (Sometsuke) and Somenishiki ware created using Fukaumi Shouten's Gosu (blue underglaze) have been beloved by royalty and aristocrats worldwide, and proudly exhibited in museums.\u003cbr\u003e\u003cbr\u003e\u003cstrong style=\"color: #005bd3;\"\u003eFeatured on the BBC and Japanese National Television\u003c\/strong\u003e\u003cbr\u003eOur profound history and traditional techniques caught the attention of the world when we were featured on the prestigious UK television series, \u003cstrong\u003eBBC's \u003cem\u003e\"Great Japanese Railway Journeys\"\u003c\/em\u003e\u003c\/strong\u003e.\u003cbr\u003eIn Japan, artists utilizing our Gosu have been featured on prominent programs such as \"Wafu Souhonke\" and NHK's \"Ippin,\" which highlight the nation's finest traditional craftsmanship.\u003cbr\u003e\u003cbr\u003eOur products are also trusted for official signage at research institutions and government agencies throughout Japan. We promise to deliver this world-recognized, authentic Arita Blue directly to your studio.\u003c\/p\u003e\n\u003ch2\u003e[The Manufacturing Process]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc\/DSC01766-min.jpg?cmsp_timestamp=20221222111934\" alt=\"Gosu production process with traditional stone mill\"\u003e\u003cbr\u003eTo maintain this exceptional quality, it takes more than a month from the start of production to completion for Fukaumi Shouten's Gosu.\u003cbr\u003e\u003cbr\u003eBy combining \u003cstrong\u003e\u003cu\u003eFukaumi Shouten's unique ingredient blend\u003c\/u\u003e\u003c\/strong\u003e, \u003cstrong\u003e\u003cu\u003eour proprietary firing technique (Calcination)\u003c\/u\u003e\u003c\/strong\u003e, and \u003cstrong\u003e\u003cu\u003ethe only stone-milling technology in Japan to micro-pulverize the grains\u003c\/u\u003e\u003c\/strong\u003e, we achieve the ultimate underglaze.\u003cbr\u003e\u003cbr\u003eThrough these rigorous processes, \u003cstrong\u003e\u003cu\u003ebrushstrokes become incredibly smooth, and the Gosu is highly resistant to burning out, even at high concentrations\u003c\/u\u003e\u003c\/strong\u003e.\u003cbr\u003e\u003cstrong\u003e\u003cu\u003eYou will not need to hand-grind the pigment yourself once it arrives; it is ready to use.\u003c\/u\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003eFukaumi Shouten is the only historic Gosu manufacturer that sells its products directly online to individuals worldwide. That is why we can offer authentic, professional-grade quality directly from our factory.\u003c\/p\u003e\n\u003cdiv class=\"youtube\" style=\"margin: 30px 0;\"\u003e\u003ciframe width=\"100%\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/1myOuT9yp4s?si=J6uVaUCtCXrHTky3\" title=\"Fukaumi Shouten Gosu Manufacturing Process\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003ch2\u003e[The History of Gosu in Arita]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0yNC1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Antique Arita ware showing traditional blue underglaze\"\u003e\u003cbr\u003eThe synthetic Gosu currently used throughout Japan was developed by the Fukaumi family during the early Meiji period (late 19th century).\u003cbr\u003e\u003cbr\u003eIn 1870, the renowned German chemist Gottfried Wagener was invited to Arita.\u003cbr\u003eDr. Wagener taught Heizaemon Fukaumi and his sons, Suminosuke and Takeji, the chemical method of producing the color blue using cobalt.\u003cbr\u003e\u003cbr\u003eFollowing this, the Fukaumi family conducted extensive research and successfully developed a scientific method for producing stable Gosu.\u003cbr\u003eAs a result, vivid and reliable synthetic Gosu began to be widely used in Arita and across Japan, establishing the world-famous \"Japan Blue\".\u003cbr\u003e\u003cbr\u003ePlease experience our premium Gosu, born from centuries of history, tradition, and the power of chemistry.\u003cbr\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0zNS1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Fukaumi Shouten Gosu powder and paste\" style=\"margin-top: 15px;\"\u003e\u003c\/p\u003e\n\u003ch2\u003e[How to Use]\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Type\u003c\/strong\u003e: Suitable for both Porcelain and Stoneware\/Earthenware.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Method\u003c\/strong\u003e: Suitable for both Oxidation and Reduction firing.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOptimal Firing Temperature\u003c\/strong\u003e: 1230°C – 1300°C (2246°F – 2372°F)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e[Firing Conditions for Sample Plates]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/MjAyNDAxR09TVV9zYW1wbGVzLW1pbg.jpg?cmsp_timestamp=20240605194159\" alt=\"Gosu color sample plates fired in reduction\"\u003e\u003cbr\u003eThe color samples shown in the main product images were fired under the following conditions:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Body\u003c\/strong\u003e: Amakusa Pottery Stone (Porcelain)\u003cbr\u003e\u003cspan style=\"font-size: 0.85em; color: #666;\"\u003e(Composition: SiO2 72.04%, Al2O3 18.16%, Fe2O3 0.65%, TiO2 0.04%, CaO 0.49%, MgO 0.09%, Na2O 0.58%, K2O 3.00%, Ig.Loss 4.55%)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Temperature \u0026amp; Atmosphere\u003c\/strong\u003e: 1280°C (2336°F) \/ Reduction Firing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"color: #d32f2f; font-weight: bold; margin-top: 10px;\"\u003e*Note: The color of the underglaze will change depending on your clay body and whether you use oxidation or reduction firing. Please test in your own kiln.\u003c\/p\u003e\n\u003ch2\u003e[Frequently Asked Questions]\u003c\/h2\u003e\n\u003cdl\u003e\n\u003cdt style=\"font-weight: bold; margin-top: 15px;\"\u003eQ: How do I use the pigment?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: It arrives in a highly concentrated paste form. Please dilute it with water according to your purpose. For line drawing (outlining), a general guide is 1 part Gosu to 3 parts water. For Dami (washes), use 1 teaspoon of Gosu to 80ml-250ml of water. Please adjust to find your ideal shade.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: Should I add a binder or adhesive (like gum arabic or CMC)?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Our Gosu does not contain added binders to allow you flexibility. If the pigment is not adhering well to your bisque ware, or if your painting process requires touching the surface repeatedly, we recommend adding a small amount of your preferred binder.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: How should I store it if I won't use it for a long time?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: We recommend storing it tightly sealed in the container. If it dries out, simply add water and grind it again in a mortar to return it to a paste.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: What causes the pigment to crawl or repel during firing?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Applying the pigment too thickly is the most common cause of crawling. It can also be caused by dust or oil (from hands) on the bisque ware before painting.\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003ch2\u003e[Shipping \u0026amp; Postage (International)]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/ZGVsaXZlcnlfMWRheQ.png?cmsp_timestamp=20240605194647\" alt=\"Fast Shipping\"\u003e\u003cbr\u003eIf you place your order \u003cu\u003ebefore noon (JST)\u003c\/u\u003e, it will generally be shipped \u003cspan style=\"color: #d32f2f;\"\u003e\u003cstrong\u003e\u003cu\u003ethe next business day\u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e from our factory in Japan.\u003cbr\u003e\u003cem\u003e*If your order includes made-to-order items like specific glazes, the entire order will be shipped once all items are ready.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAbout Shipping Fees:\u003c\/strong\u003e\u003cbr\u003eShipping costs are \u003cstrong\u003eautomatically calculated at checkout\u003c\/strong\u003e based on the total weight of your order and your delivery address (Country\/Region).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAvailable Shipping Methods:\u003c\/strong\u003e\u003cbr\u003eDuring checkout, you can choose the delivery method that best suits your needs.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eEMS (Express Mail Service)\u003c\/strong\u003e: Fast and reliable with tracking, but shipping fees are higher. Typically arrives in 3 to 7 days depending on the destination.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSurface Mail (Sea Mail)\u003c\/strong\u003e: The most economical option with lower shipping fees, but delivery is slow. It typically takes 1 to 3 months to arrive.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003e*Please note that customs duties or import taxes may apply upon arrival in your country, which are the responsibility of the buyer.\u003c\/em\u003e\u003c\/p\u003e","brand":"株式会社深海商店","offers":[{"title":"Paste 100g","offer_id":49064647786787,"sku":"100500","price":2200.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0523\/0115\/files\/047___EC-min.jpg?v=1723447893"},{"product_id":"166961946","title":"Ink Gosu in Shinwa underglaze(100g)","description":"\u003ch2\u003e[Quality \u0026amp; Craftsmanship]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"High quality Arita blue and white porcelain\" src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/Y2FwLTE0LW1pbg.jpg?cmsp_timestamp=20240605201618\"\u003e\u003cbr\u003eFor over half a century, blue and white porcelain (Sometsuke) and Somenishiki ware created using Fukaumi Shouten's Gosu (blue underglaze) have been beloved by royalty and aristocrats worldwide, and proudly exhibited in museums.\u003cbr\u003e\u003cbr\u003e\u003cstrong style=\"color: #005bd3;\"\u003eFeatured on the BBC and Japanese National Television\u003c\/strong\u003e\u003cbr\u003eOur profound history and traditional techniques caught the attention of the world when we were featured on the prestigious UK television series, \u003cstrong\u003eBBC's \u003cem\u003e\"Great Japanese Railway Journeys\"\u003c\/em\u003e\u003c\/strong\u003e.\u003cbr\u003eIn Japan, artists utilizing our Gosu have been featured on prominent programs such as \"Wafu Souhonke\" and NHK's \"Ippin,\" which highlight the nation's finest traditional craftsmanship.\u003cbr\u003e\u003cbr\u003eOur products are also trusted for official signage at research institutions and government agencies throughout Japan. We promise to deliver this world-recognized, authentic Arita Blue directly to your studio.\u003c\/p\u003e\n\u003ch2\u003e[The Manufacturing Process]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc\/DSC01766-min.jpg?cmsp_timestamp=20221222111934\" alt=\"Gosu production process with traditional stone mill\"\u003e\u003cbr\u003eTo maintain this exceptional quality, it takes more than a month from the start of production to completion for Fukaumi Shouten's Gosu.\u003cbr\u003e\u003cbr\u003eBy combining \u003cstrong\u003e\u003cu\u003eFukaumi Shouten's unique ingredient blend\u003c\/u\u003e\u003c\/strong\u003e, \u003cstrong\u003e\u003cu\u003eour proprietary firing technique (Calcination)\u003c\/u\u003e\u003c\/strong\u003e, and \u003cstrong\u003e\u003cu\u003ethe only stone-milling technology in Japan to micro-pulverize the grains\u003c\/u\u003e\u003c\/strong\u003e, we achieve the ultimate underglaze.\u003cbr\u003e\u003cbr\u003eThrough these rigorous processes, \u003cstrong\u003e\u003cu\u003ebrushstrokes become incredibly smooth, and the Gosu is highly resistant to burning out, even at high concentrations\u003c\/u\u003e\u003c\/strong\u003e.\u003cbr\u003e\u003cstrong\u003e\u003cu\u003eYou will not need to hand-grind the pigment yourself once it arrives; it is ready to use.\u003c\/u\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003eFukaumi Shouten is the only historic Gosu manufacturer that sells its products directly online to individuals worldwide. That is why we can offer authentic, professional-grade quality directly from our factory.\u003c\/p\u003e\n\u003cdiv class=\"youtube\" style=\"margin: 30px 0;\"\u003e\u003ciframe width=\"100%\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/1myOuT9yp4s?si=J6uVaUCtCXrHTky3\" title=\"Fukaumi Shouten Gosu Manufacturing Process\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003ch2\u003e[The History of Gosu in Arita]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0yNC1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Antique Arita ware showing traditional blue underglaze\"\u003e\u003cbr\u003eThe synthetic Gosu currently used throughout Japan was developed by the Fukaumi family during the early Meiji period (late 19th century).\u003cbr\u003e\u003cbr\u003eIn 1870, the renowned German chemist Gottfried Wagener was invited to Arita.\u003cbr\u003eDr. Wagener taught Heizaemon Fukaumi and his sons, Suminosuke and Takeji, the chemical method of producing the color blue using cobalt.\u003cbr\u003e\u003cbr\u003eFollowing this, the Fukaumi family conducted extensive research and successfully developed a scientific method for producing stable Gosu.\u003cbr\u003eAs a result, vivid and reliable synthetic Gosu began to be widely used in Arita and across Japan, establishing the world-famous \"Japan Blue\".\u003cbr\u003e\u003cbr\u003ePlease experience our premium Gosu, born from centuries of history, tradition, and the power of chemistry.\u003cbr\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0zNS1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Fukaumi Shouten Gosu powder and paste\" style=\"margin-top: 15px;\"\u003e\u003c\/p\u003e\n\u003ch2\u003e[How to Use]\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Type\u003c\/strong\u003e: Suitable for both Porcelain and Stoneware\/Earthenware.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Method\u003c\/strong\u003e: Suitable for both Oxidation and Reduction firing.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOptimal Firing Temperature\u003c\/strong\u003e: 1230°C – 1300°C (2246°F – 2372°F)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e[Firing Conditions for Sample Plates]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/MjAyNDAxR09TVV9zYW1wbGVzLW1pbg.jpg?cmsp_timestamp=20240605194159\" alt=\"Gosu color sample plates fired in reduction\"\u003e\u003cbr\u003eThe color samples shown in the main product images were fired under the following conditions:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Body\u003c\/strong\u003e: Amakusa Pottery Stone (Porcelain)\u003cbr\u003e\u003cspan style=\"font-size: 0.85em; color: #666;\"\u003e(Composition: SiO2 72.04%, Al2O3 18.16%, Fe2O3 0.65%, TiO2 0.04%, CaO 0.49%, MgO 0.09%, Na2O 0.58%, K2O 3.00%, Ig.Loss 4.55%)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Temperature \u0026amp; Atmosphere\u003c\/strong\u003e: 1280°C (2336°F) \/ Reduction Firing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"color: #d32f2f; font-weight: bold; margin-top: 10px;\"\u003e*Note: The color of the underglaze will change depending on your clay body and whether you use oxidation or reduction firing. Please test in your own kiln.\u003c\/p\u003e\n\u003ch2\u003e[Frequently Asked Questions]\u003c\/h2\u003e\n\u003cdl\u003e\n\u003cdt style=\"font-weight: bold; margin-top: 15px;\"\u003eQ: How do I use the pigment?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: It arrives in a highly concentrated paste form. Please dilute it with water according to your purpose. For line drawing (outlining), a general guide is 1 part Gosu to 3 parts water. For Dami (washes), use 1 teaspoon of Gosu to 80ml-250ml of water. Please adjust to find your ideal shade.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: Should I add a binder or adhesive (like gum arabic or CMC)?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Our Gosu does not contain added binders to allow you flexibility. If the pigment is not adhering well to your bisque ware, or if your painting process requires touching the surface repeatedly, we recommend adding a small amount of your preferred binder.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: How should I store it if I won't use it for a long time?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: We recommend storing it tightly sealed in the container. If it dries out, simply add water and grind it again in a mortar to return it to a paste.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: What causes the pigment to crawl or repel during firing?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Applying the pigment too thickly is the most common cause of crawling. It can also be caused by dust or oil (from hands) on the bisque ware before painting.\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003ch2\u003e[Shipping \u0026amp; Postage (International)]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/ZGVsaXZlcnlfMWRheQ.png?cmsp_timestamp=20240605194647\" alt=\"Fast Shipping\"\u003e\u003cbr\u003eIf you place your order \u003cu\u003ebefore noon (JST)\u003c\/u\u003e, it will generally be shipped \u003cspan style=\"color: #d32f2f;\"\u003e\u003cstrong\u003e\u003cu\u003ethe next business day\u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e from our factory in Japan.\u003cbr\u003e\u003cem\u003e*If your order includes made-to-order items like specific glazes, the entire order will be shipped once all items are ready.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAbout Shipping Fees:\u003c\/strong\u003e\u003cbr\u003eShipping costs are \u003cstrong\u003eautomatically calculated at checkout\u003c\/strong\u003e based on the total weight of your order and your delivery address (Country\/Region).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAvailable Shipping Methods:\u003c\/strong\u003e\u003cbr\u003eDuring checkout, you can choose the delivery method that best suits your needs.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eEMS (Express Mail Service)\u003c\/strong\u003e: Fast and reliable with tracking, but shipping fees are higher. Typically arrives in 3 to 7 days depending on the destination.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSurface Mail (Sea Mail)\u003c\/strong\u003e: The most economical option with lower shipping fees, but delivery is slow. It typically takes 1 to 3 months to arrive.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003e*Please note that customs duties or import taxes may apply upon arrival in your country, which are the responsibility of the buyer.\u003c\/em\u003e\u003c\/p\u003e","brand":"株式会社深海商店","offers":[{"title":"Paste 100g","offer_id":49065324577059,"sku":"102740","price":2800.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0523\/0115\/files\/min.jpg?v=1723464579"},{"product_id":"166961956","title":"Ink Gosu No.2 underglaze (100g)","description":"\u003ch2\u003e[Quality \u0026amp; Craftsmanship]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"High quality Arita blue and white porcelain\" src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/Y2FwLTE0LW1pbg.jpg?cmsp_timestamp=20240605201618\"\u003e\u003cbr\u003eFor over half a century, blue and white porcelain (Sometsuke) and Somenishiki ware created using Fukaumi Shouten's Gosu (blue underglaze) have been beloved by royalty and aristocrats worldwide, and proudly exhibited in museums.\u003cbr\u003e\u003cbr\u003e\u003cstrong style=\"color: #005bd3;\"\u003eFeatured on the BBC and Japanese National Television\u003c\/strong\u003e\u003cbr\u003eOur profound history and traditional techniques caught the attention of the world when we were featured on the prestigious UK television series, \u003cstrong\u003eBBC's \u003cem\u003e\"Great Japanese Railway Journeys\"\u003c\/em\u003e\u003c\/strong\u003e.\u003cbr\u003eIn Japan, artists utilizing our Gosu have been featured on prominent programs such as \"Wafu Souhonke\" and NHK's \"Ippin,\" which highlight the nation's finest traditional craftsmanship.\u003cbr\u003e\u003cbr\u003eOur products are also trusted for official signage at research institutions and government agencies throughout Japan. We promise to deliver this world-recognized, authentic Arita Blue directly to your studio.\u003c\/p\u003e\n\u003ch2\u003e[The Manufacturing Process]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc\/DSC01766-min.jpg?cmsp_timestamp=20221222111934\" alt=\"Gosu production process with traditional stone mill\"\u003e\u003cbr\u003eTo maintain this exceptional quality, it takes more than a month from the start of production to completion for Fukaumi Shouten's Gosu.\u003cbr\u003e\u003cbr\u003eBy combining \u003cstrong\u003e\u003cu\u003eFukaumi Shouten's unique ingredient blend\u003c\/u\u003e\u003c\/strong\u003e, \u003cstrong\u003e\u003cu\u003eour proprietary firing technique (Calcination)\u003c\/u\u003e\u003c\/strong\u003e, and \u003cstrong\u003e\u003cu\u003ethe only stone-milling technology in Japan to micro-pulverize the grains\u003c\/u\u003e\u003c\/strong\u003e, we achieve the ultimate underglaze.\u003cbr\u003e\u003cbr\u003eThrough these rigorous processes, \u003cstrong\u003e\u003cu\u003ebrushstrokes become incredibly smooth, and the Gosu is highly resistant to burning out, even at high concentrations\u003c\/u\u003e\u003c\/strong\u003e.\u003cbr\u003e\u003cstrong\u003e\u003cu\u003eYou will not need to hand-grind the pigment yourself once it arrives; it is ready to use.\u003c\/u\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003eFukaumi Shouten is the only historic Gosu manufacturer that sells its products directly online to individuals worldwide. That is why we can offer authentic, professional-grade quality directly from our factory.\u003c\/p\u003e\n\u003cdiv class=\"youtube\" style=\"margin: 30px 0;\"\u003e\u003ciframe width=\"100%\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/1myOuT9yp4s?si=J6uVaUCtCXrHTky3\" title=\"Fukaumi Shouten Gosu Manufacturing Process\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003ch2\u003e[The History of Gosu in Arita]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0yNC1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Antique Arita ware showing traditional blue underglaze\"\u003e\u003cbr\u003eThe synthetic Gosu currently used throughout Japan was developed by the Fukaumi family during the early Meiji period (late 19th century).\u003cbr\u003e\u003cbr\u003eIn 1870, the renowned German chemist Gottfried Wagener was invited to Arita.\u003cbr\u003eDr. Wagener taught Heizaemon Fukaumi and his sons, Suminosuke and Takeji, the chemical method of producing the color blue using cobalt.\u003cbr\u003e\u003cbr\u003eFollowing this, the Fukaumi family conducted extensive research and successfully developed a scientific method for producing stable Gosu.\u003cbr\u003eAs a result, vivid and reliable synthetic Gosu began to be widely used in Arita and across Japan, establishing the world-famous \"Japan Blue\".\u003cbr\u003e\u003cbr\u003ePlease experience our premium Gosu, born from centuries of history, tradition, and the power of chemistry.\u003cbr\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0zNS1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Fukaumi Shouten Gosu powder and paste\" style=\"margin-top: 15px;\"\u003e\u003c\/p\u003e\n\u003ch2\u003e[How to Use]\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Type\u003c\/strong\u003e: Suitable for both Porcelain and Stoneware\/Earthenware.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Method\u003c\/strong\u003e: Suitable for both Oxidation and Reduction firing.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOptimal Firing Temperature\u003c\/strong\u003e: 1230°C – 1300°C (2246°F – 2372°F)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e[Firing Conditions for Sample Plates]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/MjAyNDAxR09TVV9zYW1wbGVzLW1pbg.jpg?cmsp_timestamp=20240605194159\" alt=\"Gosu color sample plates fired in reduction\"\u003e\u003cbr\u003eThe color samples shown in the main product images were fired under the following conditions:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Body\u003c\/strong\u003e: Amakusa Pottery Stone (Porcelain)\u003cbr\u003e\u003cspan style=\"font-size: 0.85em; color: #666;\"\u003e(Composition: SiO2 72.04%, Al2O3 18.16%, Fe2O3 0.65%, TiO2 0.04%, CaO 0.49%, MgO 0.09%, Na2O 0.58%, K2O 3.00%, Ig.Loss 4.55%)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Temperature \u0026amp; Atmosphere\u003c\/strong\u003e: 1280°C (2336°F) \/ Reduction Firing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"color: #d32f2f; font-weight: bold; margin-top: 10px;\"\u003e*Note: The color of the underglaze will change depending on your clay body and whether you use oxidation or reduction firing. Please test in your own kiln.\u003c\/p\u003e\n\u003ch2\u003e[Frequently Asked Questions]\u003c\/h2\u003e\n\u003cdl\u003e\n\u003cdt style=\"font-weight: bold; margin-top: 15px;\"\u003eQ: How do I use the pigment?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: It arrives in a highly concentrated paste form. Please dilute it with water according to your purpose. For line drawing (outlining), a general guide is 1 part Gosu to 3 parts water. For Dami (washes), use 1 teaspoon of Gosu to 80ml-250ml of water. Please adjust to find your ideal shade.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: Should I add a binder or adhesive (like gum arabic or CMC)?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Our Gosu does not contain added binders to allow you flexibility. If the pigment is not adhering well to your bisque ware, or if your painting process requires touching the surface repeatedly, we recommend adding a small amount of your preferred binder.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: How should I store it if I won't use it for a long time?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: We recommend storing it tightly sealed in the container. If it dries out, simply add water and grind it again in a mortar to return it to a paste.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: What causes the pigment to crawl or repel during firing?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Applying the pigment too thickly is the most common cause of crawling. It can also be caused by dust or oil (from hands) on the bisque ware before painting.\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003ch2\u003e[Shipping \u0026amp; Postage (International)]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/ZGVsaXZlcnlfMWRheQ.png?cmsp_timestamp=20240605194647\" alt=\"Fast Shipping\"\u003e\u003cbr\u003eIf you place your order \u003cu\u003ebefore noon (JST)\u003c\/u\u003e, it will generally be shipped \u003cspan style=\"color: #d32f2f;\"\u003e\u003cstrong\u003e\u003cu\u003ethe next business day\u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e from our factory in Japan.\u003cbr\u003e\u003cem\u003e*If your order includes made-to-order items like specific glazes, the entire order will be shipped once all items are ready.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAbout Shipping Fees:\u003c\/strong\u003e\u003cbr\u003eShipping costs are \u003cstrong\u003eautomatically calculated at checkout\u003c\/strong\u003e based on the total weight of your order and your delivery address (Country\/Region).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAvailable Shipping Methods:\u003c\/strong\u003e\u003cbr\u003eDuring checkout, you can choose the delivery method that best suits your needs.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eEMS (Express Mail Service)\u003c\/strong\u003e: Fast and reliable with tracking, but shipping fees are higher. Typically arrives in 3 to 7 days depending on the destination.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSurface Mail (Sea Mail)\u003c\/strong\u003e: The most economical option with lower shipping fees, but delivery is slow. It typically takes 1 to 3 months to arrive.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003e*Please note that customs duties or import taxes may apply upon arrival in your country, which are the responsibility of the buyer.\u003c\/em\u003e\u003c\/p\u003e","brand":"株式会社深海商店","offers":[{"title":"Paste 100g","offer_id":49065187901731,"sku":"102980","price":2500.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0523\/0115\/files\/031__No2_EC-min.jpg?v=1723448973"},{"product_id":"167647923","title":"Line gosu (100g)","description":"\u003ch2\u003e[Quality \u0026amp; Craftsmanship]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"High quality Arita blue and white porcelain\" src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/Y2FwLTE0LW1pbg.jpg?cmsp_timestamp=20240605201618\"\u003e\u003cbr\u003eFor over half a century, blue and white porcelain (Sometsuke) and Somenishiki ware created using Fukaumi Shouten's Gosu (blue underglaze) have been beloved by royalty and aristocrats worldwide, and proudly exhibited in museums.\u003cbr\u003e\u003cbr\u003e\u003cstrong style=\"color: #005bd3;\"\u003eFeatured on the BBC and Japanese National Television\u003c\/strong\u003e\u003cbr\u003eOur profound history and traditional techniques caught the attention of the world when we were featured on the prestigious UK television series, \u003cstrong\u003eBBC's \u003cem\u003e\"Great Japanese Railway Journeys\"\u003c\/em\u003e\u003c\/strong\u003e.\u003cbr\u003eIn Japan, artists utilizing our Gosu have been featured on prominent programs such as \"Wafu Souhonke\" and NHK's \"Ippin,\" which highlight the nation's finest traditional craftsmanship.\u003cbr\u003e\u003cbr\u003eOur products are also trusted for official signage at research institutions and government agencies throughout Japan. We promise to deliver this world-recognized, authentic Arita Blue directly to your studio.\u003c\/p\u003e\n\u003ch2\u003e[The Manufacturing Process]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc\/DSC01766-min.jpg?cmsp_timestamp=20221222111934\" alt=\"Gosu production process with traditional stone mill\"\u003e\u003cbr\u003eTo maintain this exceptional quality, it takes more than a month from the start of production to completion for Fukaumi Shouten's Gosu.\u003cbr\u003e\u003cbr\u003eBy combining \u003cstrong\u003e\u003cu\u003eFukaumi Shouten's unique ingredient blend\u003c\/u\u003e\u003c\/strong\u003e, \u003cstrong\u003e\u003cu\u003eour proprietary firing technique (Calcination)\u003c\/u\u003e\u003c\/strong\u003e, and \u003cstrong\u003e\u003cu\u003ethe only stone-milling technology in Japan to micro-pulverize the grains\u003c\/u\u003e\u003c\/strong\u003e, we achieve the ultimate underglaze.\u003cbr\u003e\u003cbr\u003eThrough these rigorous processes, \u003cstrong\u003e\u003cu\u003ebrushstrokes become incredibly smooth, and the Gosu is highly resistant to burning out, even at high concentrations\u003c\/u\u003e\u003c\/strong\u003e.\u003cbr\u003e\u003cstrong\u003e\u003cu\u003eYou will not need to hand-grind the pigment yourself once it arrives; it is ready to use.\u003c\/u\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003eFukaumi Shouten is the only historic Gosu manufacturer that sells its products directly online to individuals worldwide. That is why we can offer authentic, professional-grade quality directly from our factory.\u003c\/p\u003e\n\u003cdiv class=\"youtube\" style=\"margin: 30px 0;\"\u003e\u003ciframe width=\"100%\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/1myOuT9yp4s?si=J6uVaUCtCXrHTky3\" title=\"Fukaumi Shouten Gosu Manufacturing Process\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003ch2\u003e[The History of Gosu in Arita]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0yNC1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Antique Arita ware showing traditional blue underglaze\"\u003e\u003cbr\u003eThe synthetic Gosu currently used throughout Japan was developed by the Fukaumi family during the early Meiji period (late 19th century).\u003cbr\u003e\u003cbr\u003eIn 1870, the renowned German chemist Gottfried Wagener was invited to Arita.\u003cbr\u003eDr. Wagener taught Heizaemon Fukaumi and his sons, Suminosuke and Takeji, the chemical method of producing the color blue using cobalt.\u003cbr\u003e\u003cbr\u003eFollowing this, the Fukaumi family conducted extensive research and successfully developed a scientific method for producing stable Gosu.\u003cbr\u003eAs a result, vivid and reliable synthetic Gosu began to be widely used in Arita and across Japan, establishing the world-famous \"Japan Blue\".\u003cbr\u003e\u003cbr\u003ePlease experience our premium Gosu, born from centuries of history, tradition, and the power of chemistry.\u003cbr\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0zNS1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Fukaumi Shouten Gosu powder and paste\" style=\"margin-top: 15px;\"\u003e\u003c\/p\u003e\n\u003ch2\u003e[How to Use]\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Type\u003c\/strong\u003e: Suitable for both Porcelain and Stoneware\/Earthenware.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Method\u003c\/strong\u003e: Suitable for both Oxidation and Reduction firing.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOptimal Firing Temperature\u003c\/strong\u003e: 1230°C – 1300°C (2246°F – 2372°F)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e[Firing Conditions for Sample Plates]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/MjAyNDAxR09TVV9zYW1wbGVzLW1pbg.jpg?cmsp_timestamp=20240605194159\" alt=\"Gosu color sample plates fired in reduction\"\u003e\u003cbr\u003eThe color samples shown in the main product images were fired under the following conditions:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Body\u003c\/strong\u003e: Amakusa Pottery Stone (Porcelain)\u003cbr\u003e\u003cspan style=\"font-size: 0.85em; color: #666;\"\u003e(Composition: SiO2 72.04%, Al2O3 18.16%, Fe2O3 0.65%, TiO2 0.04%, CaO 0.49%, MgO 0.09%, Na2O 0.58%, K2O 3.00%, Ig.Loss 4.55%)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Temperature \u0026amp; Atmosphere\u003c\/strong\u003e: 1280°C (2336°F) \/ Reduction Firing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"color: #d32f2f; font-weight: bold; margin-top: 10px;\"\u003e*Note: The color of the underglaze will change depending on your clay body and whether you use oxidation or reduction firing. Please test in your own kiln.\u003c\/p\u003e\n\u003ch2\u003e[Frequently Asked Questions]\u003c\/h2\u003e\n\u003cdl\u003e\n\u003cdt style=\"font-weight: bold; margin-top: 15px;\"\u003eQ: How do I use the pigment?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: It arrives in a highly concentrated paste form. Please dilute it with water according to your purpose. For line drawing (outlining), a general guide is 1 part Gosu to 3 parts water. For Dami (washes), use 1 teaspoon of Gosu to 80ml-250ml of water. Please adjust to find your ideal shade.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: Should I add a binder or adhesive (like gum arabic or CMC)?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Our Gosu does not contain added binders to allow you flexibility. If the pigment is not adhering well to your bisque ware, or if your painting process requires touching the surface repeatedly, we recommend adding a small amount of your preferred binder.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: How should I store it if I won't use it for a long time?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: We recommend storing it tightly sealed in the container. If it dries out, simply add water and grind it again in a mortar to return it to a paste.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: What causes the pigment to crawl or repel during firing?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Applying the pigment too thickly is the most common cause of crawling. It can also be caused by dust or oil (from hands) on the bisque ware before painting.\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003ch2\u003e[Shipping \u0026amp; Postage (International)]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/ZGVsaXZlcnlfMWRheQ.png?cmsp_timestamp=20240605194647\" alt=\"Fast Shipping\"\u003e\u003cbr\u003eIf you place your order \u003cu\u003ebefore noon (JST)\u003c\/u\u003e, it will generally be shipped \u003cspan style=\"color: #d32f2f;\"\u003e\u003cstrong\u003e\u003cu\u003ethe next business day\u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e from our factory in Japan.\u003cbr\u003e\u003cem\u003e*If your order includes made-to-order items like specific glazes, the entire order will be shipped once all items are ready.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAbout Shipping Fees:\u003c\/strong\u003e\u003cbr\u003eShipping costs are \u003cstrong\u003eautomatically calculated at checkout\u003c\/strong\u003e based on the total weight of your order and your delivery address (Country\/Region).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAvailable Shipping Methods:\u003c\/strong\u003e\u003cbr\u003eDuring checkout, you can choose the delivery method that best suits your needs.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eEMS (Express Mail Service)\u003c\/strong\u003e: Fast and reliable with tracking, but shipping fees are higher. Typically arrives in 3 to 7 days depending on the destination.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSurface Mail (Sea Mail)\u003c\/strong\u003e: The most economical option with lower shipping fees, but delivery is slow. It typically takes 1 to 3 months to arrive.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003e*Please note that customs duties or import taxes may apply upon arrival in your country, which are the responsibility of the buyer.\u003c\/em\u003e\u003c\/p\u003e","brand":"株式会社深海商店","offers":[{"title":"Paste 100g","offer_id":49064634351907,"sku":"101400","price":2500.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0523\/0115\/files\/037___EC-min.jpg?v=1770941095"},{"product_id":"167648203","title":"Sujitsuyo No.2 \/Dark Line 2 underglaze(100g)","description":"\u003ch2\u003e[Quality \u0026amp; Craftsmanship]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"High quality Arita blue and white porcelain\" src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/Y2FwLTE0LW1pbg.jpg?cmsp_timestamp=20240605201618\"\u003e\u003cbr\u003eFor over half a century, blue and white porcelain (Sometsuke) and Somenishiki ware created using Fukaumi Shouten's Gosu (blue underglaze) have been beloved by royalty and aristocrats worldwide, and proudly exhibited in museums.\u003cbr\u003e\u003cbr\u003e\u003cstrong style=\"color: #005bd3;\"\u003eFeatured on the BBC and Japanese National Television\u003c\/strong\u003e\u003cbr\u003eOur profound history and traditional techniques caught the attention of the world when we were featured on the prestigious UK television series, \u003cstrong\u003eBBC's \u003cem\u003e\"Great Japanese Railway Journeys\"\u003c\/em\u003e\u003c\/strong\u003e.\u003cbr\u003eIn Japan, artists utilizing our Gosu have been featured on prominent programs such as \"Wafu Souhonke\" and NHK's \"Ippin,\" which highlight the nation's finest traditional craftsmanship.\u003cbr\u003e\u003cbr\u003eOur products are also trusted for official signage at research institutions and government agencies throughout Japan. We promise to deliver this world-recognized, authentic Arita Blue directly to your studio.\u003c\/p\u003e\n\u003ch2\u003e[The Manufacturing Process]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc\/DSC01766-min.jpg?cmsp_timestamp=20221222111934\" alt=\"Gosu production process with traditional stone mill\"\u003e\u003cbr\u003eTo maintain this exceptional quality, it takes more than a month from the start of production to completion for Fukaumi Shouten's Gosu.\u003cbr\u003e\u003cbr\u003eBy combining \u003cstrong\u003e\u003cu\u003eFukaumi Shouten's unique ingredient blend\u003c\/u\u003e\u003c\/strong\u003e, \u003cstrong\u003e\u003cu\u003eour proprietary firing technique (Calcination)\u003c\/u\u003e\u003c\/strong\u003e, and \u003cstrong\u003e\u003cu\u003ethe only stone-milling technology in Japan to micro-pulverize the grains\u003c\/u\u003e\u003c\/strong\u003e, we achieve the ultimate underglaze.\u003cbr\u003e\u003cbr\u003eThrough these rigorous processes, \u003cstrong\u003e\u003cu\u003ebrushstrokes become incredibly smooth, and the Gosu is highly resistant to burning out, even at high concentrations\u003c\/u\u003e\u003c\/strong\u003e.\u003cbr\u003e\u003cstrong\u003e\u003cu\u003eYou will not need to hand-grind the pigment yourself once it arrives; it is ready to use.\u003c\/u\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003eFukaumi Shouten is the only historic Gosu manufacturer that sells its products directly online to individuals worldwide. That is why we can offer authentic, professional-grade quality directly from our factory.\u003c\/p\u003e\n\u003cdiv class=\"youtube\" style=\"margin: 30px 0;\"\u003e\u003ciframe width=\"100%\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/1myOuT9yp4s?si=J6uVaUCtCXrHTky3\" title=\"Fukaumi Shouten Gosu Manufacturing Process\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003ch2\u003e[The History of Gosu in Arita]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0yNC1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Antique Arita ware showing traditional blue underglaze\"\u003e\u003cbr\u003eThe synthetic Gosu currently used throughout Japan was developed by the Fukaumi family during the early Meiji period (late 19th century).\u003cbr\u003e\u003cbr\u003eIn 1870, the renowned German chemist Gottfried Wagener was invited to Arita.\u003cbr\u003eDr. Wagener taught Heizaemon Fukaumi and his sons, Suminosuke and Takeji, the chemical method of producing the color blue using cobalt.\u003cbr\u003e\u003cbr\u003eFollowing this, the Fukaumi family conducted extensive research and successfully developed a scientific method for producing stable Gosu.\u003cbr\u003eAs a result, vivid and reliable synthetic Gosu began to be widely used in Arita and across Japan, establishing the world-famous \"Japan Blue\".\u003cbr\u003e\u003cbr\u003ePlease experience our premium Gosu, born from centuries of history, tradition, and the power of chemistry.\u003cbr\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0zNS1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Fukaumi Shouten Gosu powder and paste\" style=\"margin-top: 15px;\"\u003e\u003c\/p\u003e\n\u003ch2\u003e[How to Use]\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Type\u003c\/strong\u003e: Suitable for both Porcelain and Stoneware\/Earthenware.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Method\u003c\/strong\u003e: Suitable for both Oxidation and Reduction firing.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOptimal Firing Temperature\u003c\/strong\u003e: 1230°C – 1300°C (2246°F – 2372°F)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e[Firing Conditions for Sample Plates]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/MjAyNDAxR09TVV9zYW1wbGVzLW1pbg.jpg?cmsp_timestamp=20240605194159\" alt=\"Gosu color sample plates fired in reduction\"\u003e\u003cbr\u003eThe color samples shown in the main product images were fired under the following conditions:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Body\u003c\/strong\u003e: Amakusa Pottery Stone (Porcelain)\u003cbr\u003e\u003cspan style=\"font-size: 0.85em; color: #666;\"\u003e(Composition: SiO2 72.04%, Al2O3 18.16%, Fe2O3 0.65%, TiO2 0.04%, CaO 0.49%, MgO 0.09%, Na2O 0.58%, K2O 3.00%, Ig.Loss 4.55%)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Temperature \u0026amp; Atmosphere\u003c\/strong\u003e: 1280°C (2336°F) \/ Reduction Firing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"color: #d32f2f; font-weight: bold; margin-top: 10px;\"\u003e*Note: The color of the underglaze will change depending on your clay body and whether you use oxidation or reduction firing. Please test in your own kiln.\u003c\/p\u003e\n\u003ch2\u003e[Frequently Asked Questions]\u003c\/h2\u003e\n\u003cdl\u003e\n\u003cdt style=\"font-weight: bold; margin-top: 15px;\"\u003eQ: How do I use the pigment?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: It arrives in a highly concentrated paste form. Please dilute it with water according to your purpose. For line drawing (outlining), a general guide is 1 part Gosu to 3 parts water. For Dami (washes), use 1 teaspoon of Gosu to 80ml-250ml of water. Please adjust to find your ideal shade.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: Should I add a binder or adhesive (like gum arabic or CMC)?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Our Gosu does not contain added binders to allow you flexibility. If the pigment is not adhering well to your bisque ware, or if your painting process requires touching the surface repeatedly, we recommend adding a small amount of your preferred binder.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: How should I store it if I won't use it for a long time?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: We recommend storing it tightly sealed in the container. If it dries out, simply add water and grind it again in a mortar to return it to a paste.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: What causes the pigment to crawl or repel during firing?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Applying the pigment too thickly is the most common cause of crawling. It can also be caused by dust or oil (from hands) on the bisque ware before painting.\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003ch2\u003e[Shipping \u0026amp; Postage (International)]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/ZGVsaXZlcnlfMWRheQ.png?cmsp_timestamp=20240605194647\" alt=\"Fast Shipping\"\u003e\u003cbr\u003eIf you place your order \u003cu\u003ebefore noon (JST)\u003c\/u\u003e, it will generally be shipped \u003cspan style=\"color: #d32f2f;\"\u003e\u003cstrong\u003e\u003cu\u003ethe next business day\u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e from our factory in Japan.\u003cbr\u003e\u003cem\u003e*If your order includes made-to-order items like specific glazes, the entire order will be shipped once all items are ready.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAbout Shipping Fees:\u003c\/strong\u003e\u003cbr\u003eShipping costs are \u003cstrong\u003eautomatically calculated at checkout\u003c\/strong\u003e based on the total weight of your order and your delivery address (Country\/Region).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAvailable Shipping Methods:\u003c\/strong\u003e\u003cbr\u003eDuring checkout, you can choose the delivery method that best suits your needs.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eEMS (Express Mail Service)\u003c\/strong\u003e: Fast and reliable with tracking, but shipping fees are higher. Typically arrives in 3 to 7 days depending on the destination.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSurface Mail (Sea Mail)\u003c\/strong\u003e: The most economical option with lower shipping fees, but delivery is slow. It typically takes 1 to 3 months to arrive.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003e*Please note that customs duties or import taxes may apply upon arrival in your country, which are the responsibility of the buyer.\u003c\/em\u003e\u003c\/p\u003e","brand":"株式会社深海商店","offers":[{"title":"Paste 100g","offer_id":49064606138659,"sku":"102790","price":2800.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0523\/0115\/files\/039__No2_EC-min.jpg?v=1723447801"},{"product_id":"167648376","title":"Toku Gosu underglaze (100g)","description":"\u003ch2\u003e[Quality \u0026amp; Craftsmanship]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"High quality Arita blue and white porcelain\" src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/Y2FwLTE0LW1pbg.jpg?cmsp_timestamp=20240605201618\"\u003e\u003cbr\u003eFor over half a century, blue and white porcelain (Sometsuke) and Somenishiki ware created using Fukaumi Shouten's Gosu (blue underglaze) have been beloved by royalty and aristocrats worldwide, and proudly exhibited in museums.\u003cbr\u003e\u003cbr\u003e\u003cstrong style=\"color: #005bd3;\"\u003eFeatured on the BBC and Japanese National Television\u003c\/strong\u003e\u003cbr\u003eOur profound history and traditional techniques caught the attention of the world when we were featured on the prestigious UK television series, \u003cstrong\u003eBBC's \u003cem\u003e\"Great Japanese Railway Journeys\"\u003c\/em\u003e\u003c\/strong\u003e.\u003cbr\u003eIn Japan, artists utilizing our Gosu have been featured on prominent programs such as \"Wafu Souhonke\" and NHK's \"Ippin,\" which highlight the nation's finest traditional craftsmanship.\u003cbr\u003e\u003cbr\u003eOur products are also trusted for official signage at research institutions and government agencies throughout Japan. We promise to deliver this world-recognized, authentic Arita Blue directly to your studio.\u003c\/p\u003e\n\u003ch2\u003e[The Manufacturing Process]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc\/DSC01766-min.jpg?cmsp_timestamp=20221222111934\" alt=\"Gosu production process with traditional stone mill\"\u003e\u003cbr\u003eTo maintain this exceptional quality, it takes more than a month from the start of production to completion for Fukaumi Shouten's Gosu.\u003cbr\u003e\u003cbr\u003eBy combining \u003cstrong\u003e\u003cu\u003eFukaumi Shouten's unique ingredient blend\u003c\/u\u003e\u003c\/strong\u003e, \u003cstrong\u003e\u003cu\u003eour proprietary firing technique (Calcination)\u003c\/u\u003e\u003c\/strong\u003e, and \u003cstrong\u003e\u003cu\u003ethe only stone-milling technology in Japan to micro-pulverize the grains\u003c\/u\u003e\u003c\/strong\u003e, we achieve the ultimate underglaze.\u003cbr\u003e\u003cbr\u003eThrough these rigorous processes, \u003cstrong\u003e\u003cu\u003ebrushstrokes become incredibly smooth, and the Gosu is highly resistant to burning out, even at high concentrations\u003c\/u\u003e\u003c\/strong\u003e.\u003cbr\u003e\u003cstrong\u003e\u003cu\u003eYou will not need to hand-grind the pigment yourself once it arrives; it is ready to use.\u003c\/u\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003eFukaumi Shouten is the only historic Gosu manufacturer that sells its products directly online to individuals worldwide. That is why we can offer authentic, professional-grade quality directly from our factory.\u003c\/p\u003e\n\u003cdiv class=\"youtube\" style=\"margin: 30px 0;\"\u003e\u003ciframe width=\"100%\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/1myOuT9yp4s?si=J6uVaUCtCXrHTky3\" title=\"Fukaumi Shouten Gosu Manufacturing Process\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003ch2\u003e[The History of Gosu in Arita]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0yNC1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Antique Arita ware showing traditional blue underglaze\"\u003e\u003cbr\u003eThe synthetic Gosu currently used throughout Japan was developed by the Fukaumi family during the early Meiji period (late 19th century).\u003cbr\u003e\u003cbr\u003eIn 1870, the renowned German chemist Gottfried Wagener was invited to Arita.\u003cbr\u003eDr. Wagener taught Heizaemon Fukaumi and his sons, Suminosuke and Takeji, the chemical method of producing the color blue using cobalt.\u003cbr\u003e\u003cbr\u003eFollowing this, the Fukaumi family conducted extensive research and successfully developed a scientific method for producing stable Gosu.\u003cbr\u003eAs a result, vivid and reliable synthetic Gosu began to be widely used in Arita and across Japan, establishing the world-famous \"Japan Blue\".\u003cbr\u003e\u003cbr\u003ePlease experience our premium Gosu, born from centuries of history, tradition, and the power of chemistry.\u003cbr\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0zNS1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Fukaumi Shouten Gosu powder and paste\" style=\"margin-top: 15px;\"\u003e\u003c\/p\u003e\n\u003ch2\u003e[How to Use]\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Type\u003c\/strong\u003e: Suitable for both Porcelain and Stoneware\/Earthenware.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Method\u003c\/strong\u003e: Suitable for both Oxidation and Reduction firing.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOptimal Firing Temperature\u003c\/strong\u003e: 1230°C – 1300°C (2246°F – 2372°F)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e[Firing Conditions for Sample Plates]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/MjAyNDAxR09TVV9zYW1wbGVzLW1pbg.jpg?cmsp_timestamp=20240605194159\" alt=\"Gosu color sample plates fired in reduction\"\u003e\u003cbr\u003eThe color samples shown in the main product images were fired under the following conditions:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Body\u003c\/strong\u003e: Amakusa Pottery Stone (Porcelain)\u003cbr\u003e\u003cspan style=\"font-size: 0.85em; color: #666;\"\u003e(Composition: SiO2 72.04%, Al2O3 18.16%, Fe2O3 0.65%, TiO2 0.04%, CaO 0.49%, MgO 0.09%, Na2O 0.58%, K2O 3.00%, Ig.Loss 4.55%)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Temperature \u0026amp; Atmosphere\u003c\/strong\u003e: 1280°C (2336°F) \/ Reduction Firing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"color: #d32f2f; font-weight: bold; margin-top: 10px;\"\u003e*Note: The color of the underglaze will change depending on your clay body and whether you use oxidation or reduction firing. Please test in your own kiln.\u003c\/p\u003e\n\u003ch2\u003e[Frequently Asked Questions]\u003c\/h2\u003e\n\u003cdl\u003e\n\u003cdt style=\"font-weight: bold; margin-top: 15px;\"\u003eQ: How do I use the pigment?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: It arrives in a highly concentrated paste form. Please dilute it with water according to your purpose. For line drawing (outlining), a general guide is 1 part Gosu to 3 parts water. For Dami (washes), use 1 teaspoon of Gosu to 80ml-250ml of water. Please adjust to find your ideal shade.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: Should I add a binder or adhesive (like gum arabic or CMC)?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Our Gosu does not contain added binders to allow you flexibility. If the pigment is not adhering well to your bisque ware, or if your painting process requires touching the surface repeatedly, we recommend adding a small amount of your preferred binder.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: How should I store it if I won't use it for a long time?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: We recommend storing it tightly sealed in the container. If it dries out, simply add water and grind it again in a mortar to return it to a paste.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: What causes the pigment to crawl or repel during firing?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Applying the pigment too thickly is the most common cause of crawling. It can also be caused by dust or oil (from hands) on the bisque ware before painting.\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003ch2\u003e[Shipping \u0026amp; Postage (International)]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/ZGVsaXZlcnlfMWRheQ.png?cmsp_timestamp=20240605194647\" alt=\"Fast Shipping\"\u003e\u003cbr\u003eIf you place your order \u003cu\u003ebefore noon (JST)\u003c\/u\u003e, it will generally be shipped \u003cspan style=\"color: #d32f2f;\"\u003e\u003cstrong\u003e\u003cu\u003ethe next business day\u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e from our factory in Japan.\u003cbr\u003e\u003cem\u003e*If your order includes made-to-order items like specific glazes, the entire order will be shipped once all items are ready.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAbout Shipping Fees:\u003c\/strong\u003e\u003cbr\u003eShipping costs are \u003cstrong\u003eautomatically calculated at checkout\u003c\/strong\u003e based on the total weight of your order and your delivery address (Country\/Region).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAvailable Shipping Methods:\u003c\/strong\u003e\u003cbr\u003eDuring checkout, you can choose the delivery method that best suits your needs.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eEMS (Express Mail Service)\u003c\/strong\u003e: Fast and reliable with tracking, but shipping fees are higher. Typically arrives in 3 to 7 days depending on the destination.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSurface Mail (Sea Mail)\u003c\/strong\u003e: The most economical option with lower shipping fees, but delivery is slow. It typically takes 1 to 3 months to arrive.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003e*Please note that customs duties or import taxes may apply upon arrival in your country, which are the responsibility of the buyer.\u003c\/em\u003e\u003c\/p\u003e","brand":"株式会社深海商店","offers":[{"title":"Paste 100g","offer_id":49064903082275,"sku":"100090","price":2300.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0523\/0115\/files\/084___EC-min.jpg?v=1770940759"},{"product_id":"167648673","title":"Kaiheki in Toku 2 underglaze (100g)","description":"\u003ch2\u003e[Quality \u0026amp; Craftsmanship]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"High quality Arita blue and white porcelain\" src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/Y2FwLTE0LW1pbg.jpg?cmsp_timestamp=20240605201618\"\u003e\u003cbr\u003eFor over half a century, blue and white porcelain (Sometsuke) and Somenishiki ware created using Fukaumi Shouten's Gosu (blue underglaze) have been beloved by royalty and aristocrats worldwide, and proudly exhibited in museums.\u003cbr\u003e\u003cbr\u003e\u003cstrong style=\"color: #005bd3;\"\u003eFeatured on the BBC and Japanese National Television\u003c\/strong\u003e\u003cbr\u003eOur profound history and traditional techniques caught the attention of the world when we were featured on the prestigious UK television series, \u003cstrong\u003eBBC's \u003cem\u003e\"Great Japanese Railway Journeys\"\u003c\/em\u003e\u003c\/strong\u003e.\u003cbr\u003eIn Japan, artists utilizing our Gosu have been featured on prominent programs such as \"Wafu Souhonke\" and NHK's \"Ippin,\" which highlight the nation's finest traditional craftsmanship.\u003cbr\u003e\u003cbr\u003eOur products are also trusted for official signage at research institutions and government agencies throughout Japan. We promise to deliver this world-recognized, authentic Arita Blue directly to your studio.\u003c\/p\u003e\n\u003ch2\u003e[The Manufacturing Process]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc\/DSC01766-min.jpg?cmsp_timestamp=20221222111934\" alt=\"Gosu production process with traditional stone mill\"\u003e\u003cbr\u003eTo maintain this exceptional quality, it takes more than a month from the start of production to completion for Fukaumi Shouten's Gosu.\u003cbr\u003e\u003cbr\u003eBy combining \u003cstrong\u003e\u003cu\u003eFukaumi Shouten's unique ingredient blend\u003c\/u\u003e\u003c\/strong\u003e, \u003cstrong\u003e\u003cu\u003eour proprietary firing technique (Calcination)\u003c\/u\u003e\u003c\/strong\u003e, and \u003cstrong\u003e\u003cu\u003ethe only stone-milling technology in Japan to micro-pulverize the grains\u003c\/u\u003e\u003c\/strong\u003e, we achieve the ultimate underglaze.\u003cbr\u003e\u003cbr\u003eThrough these rigorous processes, \u003cstrong\u003e\u003cu\u003ebrushstrokes become incredibly smooth, and the Gosu is highly resistant to burning out, even at high concentrations\u003c\/u\u003e\u003c\/strong\u003e.\u003cbr\u003e\u003cstrong\u003e\u003cu\u003eYou will not need to hand-grind the pigment yourself once it arrives; it is ready to use.\u003c\/u\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003eFukaumi Shouten is the only historic Gosu manufacturer that sells its products directly online to individuals worldwide. That is why we can offer authentic, professional-grade quality directly from our factory.\u003c\/p\u003e\n\u003cdiv class=\"youtube\" style=\"margin: 30px 0;\"\u003e\u003ciframe width=\"100%\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/1myOuT9yp4s?si=J6uVaUCtCXrHTky3\" title=\"Fukaumi Shouten Gosu Manufacturing Process\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003ch2\u003e[The History of Gosu in Arita]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0yNC1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Antique Arita ware showing traditional blue underglaze\"\u003e\u003cbr\u003eThe synthetic Gosu currently used throughout Japan was developed by the Fukaumi family during the early Meiji period (late 19th century).\u003cbr\u003e\u003cbr\u003eIn 1870, the renowned German chemist Gottfried Wagener was invited to Arita.\u003cbr\u003eDr. Wagener taught Heizaemon Fukaumi and his sons, Suminosuke and Takeji, the chemical method of producing the color blue using cobalt.\u003cbr\u003e\u003cbr\u003eFollowing this, the Fukaumi family conducted extensive research and successfully developed a scientific method for producing stable Gosu.\u003cbr\u003eAs a result, vivid and reliable synthetic Gosu began to be widely used in Arita and across Japan, establishing the world-famous \"Japan Blue\".\u003cbr\u003e\u003cbr\u003ePlease experience our premium Gosu, born from centuries of history, tradition, and the power of chemistry.\u003cbr\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0zNS1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Fukaumi Shouten Gosu powder and paste\" style=\"margin-top: 15px;\"\u003e\u003c\/p\u003e\n\u003ch2\u003e[How to Use]\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Type\u003c\/strong\u003e: Suitable for both Porcelain and Stoneware\/Earthenware.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Method\u003c\/strong\u003e: Suitable for both Oxidation and Reduction firing.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOptimal Firing Temperature\u003c\/strong\u003e: 1230°C – 1300°C (2246°F – 2372°F)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e[Firing Conditions for Sample Plates]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/MjAyNDAxR09TVV9zYW1wbGVzLW1pbg.jpg?cmsp_timestamp=20240605194159\" alt=\"Gosu color sample plates fired in reduction\"\u003e\u003cbr\u003eThe color samples shown in the main product images were fired under the following conditions:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Body\u003c\/strong\u003e: Amakusa Pottery Stone (Porcelain)\u003cbr\u003e\u003cspan style=\"font-size: 0.85em; color: #666;\"\u003e(Composition: SiO2 72.04%, Al2O3 18.16%, Fe2O3 0.65%, TiO2 0.04%, CaO 0.49%, MgO 0.09%, Na2O 0.58%, K2O 3.00%, Ig.Loss 4.55%)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Temperature \u0026amp; Atmosphere\u003c\/strong\u003e: 1280°C (2336°F) \/ Reduction Firing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"color: #d32f2f; font-weight: bold; margin-top: 10px;\"\u003e*Note: The color of the underglaze will change depending on your clay body and whether you use oxidation or reduction firing. Please test in your own kiln.\u003c\/p\u003e\n\u003ch2\u003e[Frequently Asked Questions]\u003c\/h2\u003e\n\u003cdl\u003e\n\u003cdt style=\"font-weight: bold; margin-top: 15px;\"\u003eQ: How do I use the pigment?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: It arrives in a highly concentrated paste form. Please dilute it with water according to your purpose. For line drawing (outlining), a general guide is 1 part Gosu to 3 parts water. For Dami (washes), use 1 teaspoon of Gosu to 80ml-250ml of water. Please adjust to find your ideal shade.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: Should I add a binder or adhesive (like gum arabic or CMC)?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Our Gosu does not contain added binders to allow you flexibility. If the pigment is not adhering well to your bisque ware, or if your painting process requires touching the surface repeatedly, we recommend adding a small amount of your preferred binder.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: How should I store it if I won't use it for a long time?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: We recommend storing it tightly sealed in the container. If it dries out, simply add water and grind it again in a mortar to return it to a paste.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: What causes the pigment to crawl or repel during firing?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Applying the pigment too thickly is the most common cause of crawling. It can also be caused by dust or oil (from hands) on the bisque ware before painting.\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003ch2\u003e[Shipping \u0026amp; Postage (International)]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/ZGVsaXZlcnlfMWRheQ.png?cmsp_timestamp=20240605194647\" alt=\"Fast Shipping\"\u003e\u003cbr\u003eIf you place your order \u003cu\u003ebefore noon (JST)\u003c\/u\u003e, it will generally be shipped \u003cspan style=\"color: #d32f2f;\"\u003e\u003cstrong\u003e\u003cu\u003ethe next business day\u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e from our factory in Japan.\u003cbr\u003e\u003cem\u003e*If your order includes made-to-order items like specific glazes, the entire order will be shipped once all items are ready.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAbout Shipping Fees:\u003c\/strong\u003e\u003cbr\u003eShipping costs are \u003cstrong\u003eautomatically calculated at checkout\u003c\/strong\u003e based on the total weight of your order and your delivery address (Country\/Region).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAvailable Shipping Methods:\u003c\/strong\u003e\u003cbr\u003eDuring checkout, you can choose the delivery method that best suits your needs.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eEMS (Express Mail Service)\u003c\/strong\u003e: Fast and reliable with tracking, but shipping fees are higher. Typically arrives in 3 to 7 days depending on the destination.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSurface Mail (Sea Mail)\u003c\/strong\u003e: The most economical option with lower shipping fees, but delivery is slow. It typically takes 1 to 3 months to arrive.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003e*Please note that customs duties or import taxes may apply upon arrival in your country, which are the responsibility of the buyer.\u003c\/em\u003e\u003c\/p\u003e","brand":"株式会社深海商店","offers":[{"title":"Paste 100g","offer_id":49064670888227,"sku":"100110","price":2300.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0523\/0115\/files\/042__No2_EC-min.jpg?v=1770940735"},{"product_id":"167648694","title":"Ink Gosu in Toku 3 underglaze (100g)","description":"\u003ch2\u003e[Quality \u0026amp; Craftsmanship]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"High quality Arita blue and white porcelain\" src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/Y2FwLTE0LW1pbg.jpg?cmsp_timestamp=20240605201618\"\u003e\u003cbr\u003eFor over half a century, blue and white porcelain (Sometsuke) and Somenishiki ware created using Fukaumi Shouten's Gosu (blue underglaze) have been beloved by royalty and aristocrats worldwide, and proudly exhibited in museums.\u003cbr\u003e\u003cbr\u003e\u003cstrong style=\"color: #005bd3;\"\u003eFeatured on the BBC and Japanese National Television\u003c\/strong\u003e\u003cbr\u003eOur profound history and traditional techniques caught the attention of the world when we were featured on the prestigious UK television series, \u003cstrong\u003eBBC's \u003cem\u003e\"Great Japanese Railway Journeys\"\u003c\/em\u003e\u003c\/strong\u003e.\u003cbr\u003eIn Japan, artists utilizing our Gosu have been featured on prominent programs such as \"Wafu Souhonke\" and NHK's \"Ippin,\" which highlight the nation's finest traditional craftsmanship.\u003cbr\u003e\u003cbr\u003eOur products are also trusted for official signage at research institutions and government agencies throughout Japan. We promise to deliver this world-recognized, authentic Arita Blue directly to your studio.\u003c\/p\u003e\n\u003ch2\u003e[The Manufacturing Process]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc\/DSC01766-min.jpg?cmsp_timestamp=20221222111934\" alt=\"Gosu production process with traditional stone mill\"\u003e\u003cbr\u003eTo maintain this exceptional quality, it takes more than a month from the start of production to completion for Fukaumi Shouten's Gosu.\u003cbr\u003e\u003cbr\u003eBy combining \u003cstrong\u003e\u003cu\u003eFukaumi Shouten's unique ingredient blend\u003c\/u\u003e\u003c\/strong\u003e, \u003cstrong\u003e\u003cu\u003eour proprietary firing technique (Calcination)\u003c\/u\u003e\u003c\/strong\u003e, and \u003cstrong\u003e\u003cu\u003ethe only stone-milling technology in Japan to micro-pulverize the grains\u003c\/u\u003e\u003c\/strong\u003e, we achieve the ultimate underglaze.\u003cbr\u003e\u003cbr\u003eThrough these rigorous processes, \u003cstrong\u003e\u003cu\u003ebrushstrokes become incredibly smooth, and the Gosu is highly resistant to burning out, even at high concentrations\u003c\/u\u003e\u003c\/strong\u003e.\u003cbr\u003e\u003cstrong\u003e\u003cu\u003eYou will not need to hand-grind the pigment yourself once it arrives; it is ready to use.\u003c\/u\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003eFukaumi Shouten is the only historic Gosu manufacturer that sells its products directly online to individuals worldwide. That is why we can offer authentic, professional-grade quality directly from our factory.\u003c\/p\u003e\n\u003cdiv class=\"youtube\" style=\"margin: 30px 0;\"\u003e\u003ciframe width=\"100%\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/1myOuT9yp4s?si=J6uVaUCtCXrHTky3\" title=\"Fukaumi Shouten Gosu Manufacturing Process\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003ch2\u003e[The History of Gosu in Arita]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0yNC1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Antique Arita ware showing traditional blue underglaze\"\u003e\u003cbr\u003eThe synthetic Gosu currently used throughout Japan was developed by the Fukaumi family during the early Meiji period (late 19th century).\u003cbr\u003e\u003cbr\u003eIn 1870, the renowned German chemist Gottfried Wagener was invited to Arita.\u003cbr\u003eDr. Wagener taught Heizaemon Fukaumi and his sons, Suminosuke and Takeji, the chemical method of producing the color blue using cobalt.\u003cbr\u003e\u003cbr\u003eFollowing this, the Fukaumi family conducted extensive research and successfully developed a scientific method for producing stable Gosu.\u003cbr\u003eAs a result, vivid and reliable synthetic Gosu began to be widely used in Arita and across Japan, establishing the world-famous \"Japan Blue\".\u003cbr\u003e\u003cbr\u003ePlease experience our premium Gosu, born from centuries of history, tradition, and the power of chemistry.\u003cbr\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0zNS1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Fukaumi Shouten Gosu powder and paste\" style=\"margin-top: 15px;\"\u003e\u003c\/p\u003e\n\u003ch2\u003e[How to Use]\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Type\u003c\/strong\u003e: Suitable for both Porcelain and Stoneware\/Earthenware.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Method\u003c\/strong\u003e: Suitable for both Oxidation and Reduction firing.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOptimal Firing Temperature\u003c\/strong\u003e: 1230°C – 1300°C (2246°F – 2372°F)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e[Firing Conditions for Sample Plates]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/MjAyNDAxR09TVV9zYW1wbGVzLW1pbg.jpg?cmsp_timestamp=20240605194159\" alt=\"Gosu color sample plates fired in reduction\"\u003e\u003cbr\u003eThe color samples shown in the main product images were fired under the following conditions:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Body\u003c\/strong\u003e: Amakusa Pottery Stone (Porcelain)\u003cbr\u003e\u003cspan style=\"font-size: 0.85em; color: #666;\"\u003e(Composition: SiO2 72.04%, Al2O3 18.16%, Fe2O3 0.65%, TiO2 0.04%, CaO 0.49%, MgO 0.09%, Na2O 0.58%, K2O 3.00%, Ig.Loss 4.55%)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Temperature \u0026amp; Atmosphere\u003c\/strong\u003e: 1280°C (2336°F) \/ Reduction Firing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"color: #d32f2f; font-weight: bold; margin-top: 10px;\"\u003e*Note: The color of the underglaze will change depending on your clay body and whether you use oxidation or reduction firing. Please test in your own kiln.\u003c\/p\u003e\n\u003ch2\u003e[Frequently Asked Questions]\u003c\/h2\u003e\n\u003cdl\u003e\n\u003cdt style=\"font-weight: bold; margin-top: 15px;\"\u003eQ: How do I use the pigment?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: It arrives in a highly concentrated paste form. Please dilute it with water according to your purpose. For line drawing (outlining), a general guide is 1 part Gosu to 3 parts water. For Dami (washes), use 1 teaspoon of Gosu to 80ml-250ml of water. Please adjust to find your ideal shade.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: Should I add a binder or adhesive (like gum arabic or CMC)?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Our Gosu does not contain added binders to allow you flexibility. If the pigment is not adhering well to your bisque ware, or if your painting process requires touching the surface repeatedly, we recommend adding a small amount of your preferred binder.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: How should I store it if I won't use it for a long time?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: We recommend storing it tightly sealed in the container. If it dries out, simply add water and grind it again in a mortar to return it to a paste.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: What causes the pigment to crawl or repel during firing?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Applying the pigment too thickly is the most common cause of crawling. It can also be caused by dust or oil (from hands) on the bisque ware before painting.\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003ch2\u003e[Shipping \u0026amp; Postage (International)]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/ZGVsaXZlcnlfMWRheQ.png?cmsp_timestamp=20240605194647\" alt=\"Fast Shipping\"\u003e\u003cbr\u003eIf you place your order \u003cu\u003ebefore noon (JST)\u003c\/u\u003e, it will generally be shipped \u003cspan style=\"color: #d32f2f;\"\u003e\u003cstrong\u003e\u003cu\u003ethe next business day\u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e from our factory in Japan.\u003cbr\u003e\u003cem\u003e*If your order includes made-to-order items like specific glazes, the entire order will be shipped once all items are ready.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAbout Shipping Fees:\u003c\/strong\u003e\u003cbr\u003eShipping costs are \u003cstrong\u003eautomatically calculated at checkout\u003c\/strong\u003e based on the total weight of your order and your delivery address (Country\/Region).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAvailable Shipping Methods:\u003c\/strong\u003e\u003cbr\u003eDuring checkout, you can choose the delivery method that best suits your needs.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eEMS (Express Mail Service)\u003c\/strong\u003e: Fast and reliable with tracking, but shipping fees are higher. Typically arrives in 3 to 7 days depending on the destination.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSurface Mail (Sea Mail)\u003c\/strong\u003e: The most economical option with lower shipping fees, but delivery is slow. It typically takes 1 to 3 months to arrive.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003e*Please note that customs duties or import taxes may apply upon arrival in your country, which are the responsibility of the buyer.\u003c\/em\u003e\u003c\/p\u003e","brand":"株式会社深海商店","offers":[{"title":"Paste 100g","offer_id":49064652112163,"sku":"103010","price":2400.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0523\/0115\/files\/048__No3_EC-min.jpg?v=1723447915"},{"product_id":"167648801","title":"Meissen underglaze (100g)","description":"\u003ch2\u003e[Quality \u0026amp; Craftsmanship]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"High quality Arita blue and white porcelain\" src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/Y2FwLTE0LW1pbg.jpg?cmsp_timestamp=20240605201618\"\u003e\u003cbr\u003eFor over half a century, blue and white porcelain (Sometsuke) and Somenishiki ware created using Fukaumi Shouten's Gosu (blue underglaze) have been beloved by royalty and aristocrats worldwide, and proudly exhibited in museums.\u003cbr\u003e\u003cbr\u003e\u003cstrong style=\"color: #005bd3;\"\u003eFeatured on the BBC and Japanese National Television\u003c\/strong\u003e\u003cbr\u003eOur profound history and traditional techniques caught the attention of the world when we were featured on the prestigious UK television series, \u003cstrong\u003eBBC's \u003cem\u003e\"Great Japanese Railway Journeys\"\u003c\/em\u003e\u003c\/strong\u003e.\u003cbr\u003eIn Japan, artists utilizing our Gosu have been featured on prominent programs such as \"Wafu Souhonke\" and NHK's \"Ippin,\" which highlight the nation's finest traditional craftsmanship.\u003cbr\u003e\u003cbr\u003eOur products are also trusted for official signage at research institutions and government agencies throughout Japan. We promise to deliver this world-recognized, authentic Arita Blue directly to your studio.\u003c\/p\u003e\n\u003ch2\u003e[The Manufacturing Process]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc\/DSC01766-min.jpg?cmsp_timestamp=20221222111934\" alt=\"Gosu production process with traditional stone mill\"\u003e\u003cbr\u003eTo maintain this exceptional quality, it takes more than a month from the start of production to completion for Fukaumi Shouten's Gosu.\u003cbr\u003e\u003cbr\u003eBy combining \u003cstrong\u003e\u003cu\u003eFukaumi Shouten's unique ingredient blend\u003c\/u\u003e\u003c\/strong\u003e, \u003cstrong\u003e\u003cu\u003eour proprietary firing technique (Calcination)\u003c\/u\u003e\u003c\/strong\u003e, and \u003cstrong\u003e\u003cu\u003ethe only stone-milling technology in Japan to micro-pulverize the grains\u003c\/u\u003e\u003c\/strong\u003e, we achieve the ultimate underglaze.\u003cbr\u003e\u003cbr\u003eThrough these rigorous processes, \u003cstrong\u003e\u003cu\u003ebrushstrokes become incredibly smooth, and the Gosu is highly resistant to burning out, even at high concentrations\u003c\/u\u003e\u003c\/strong\u003e.\u003cbr\u003e\u003cstrong\u003e\u003cu\u003eYou will not need to hand-grind the pigment yourself once it arrives; it is ready to use.\u003c\/u\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003eFukaumi Shouten is the only historic Gosu manufacturer that sells its products directly online to individuals worldwide. That is why we can offer authentic, professional-grade quality directly from our factory.\u003c\/p\u003e\n\u003cdiv class=\"youtube\" style=\"margin: 30px 0;\"\u003e\u003ciframe width=\"100%\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/1myOuT9yp4s?si=J6uVaUCtCXrHTky3\" title=\"Fukaumi Shouten Gosu Manufacturing Process\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003ch2\u003e[The History of Gosu in Arita]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0yNC1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Antique Arita ware showing traditional blue underglaze\"\u003e\u003cbr\u003eThe synthetic Gosu currently used throughout Japan was developed by the Fukaumi family during the early Meiji period (late 19th century).\u003cbr\u003e\u003cbr\u003eIn 1870, the renowned German chemist Gottfried Wagener was invited to Arita.\u003cbr\u003eDr. Wagener taught Heizaemon Fukaumi and his sons, Suminosuke and Takeji, the chemical method of producing the color blue using cobalt.\u003cbr\u003e\u003cbr\u003eFollowing this, the Fukaumi family conducted extensive research and successfully developed a scientific method for producing stable Gosu.\u003cbr\u003eAs a result, vivid and reliable synthetic Gosu began to be widely used in Arita and across Japan, establishing the world-famous \"Japan Blue\".\u003cbr\u003e\u003cbr\u003ePlease experience our premium Gosu, born from centuries of history, tradition, and the power of chemistry.\u003cbr\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0zNS1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Fukaumi Shouten Gosu powder and paste\" style=\"margin-top: 15px;\"\u003e\u003c\/p\u003e\n\u003ch2\u003e[How to Use]\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Type\u003c\/strong\u003e: Suitable for both Porcelain and Stoneware\/Earthenware.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Method\u003c\/strong\u003e: Suitable for both Oxidation and Reduction firing.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOptimal Firing Temperature\u003c\/strong\u003e: 1230°C – 1300°C (2246°F – 2372°F)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e[Firing Conditions for Sample Plates]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/MjAyNDAxR09TVV9zYW1wbGVzLW1pbg.jpg?cmsp_timestamp=20240605194159\" alt=\"Gosu color sample plates fired in reduction\"\u003e\u003cbr\u003eThe color samples shown in the main product images were fired under the following conditions:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Body\u003c\/strong\u003e: Amakusa Pottery Stone (Porcelain)\u003cbr\u003e\u003cspan style=\"font-size: 0.85em; color: #666;\"\u003e(Composition: SiO2 72.04%, Al2O3 18.16%, Fe2O3 0.65%, TiO2 0.04%, CaO 0.49%, MgO 0.09%, Na2O 0.58%, K2O 3.00%, Ig.Loss 4.55%)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Temperature \u0026amp; Atmosphere\u003c\/strong\u003e: 1280°C (2336°F) \/ Reduction Firing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"color: #d32f2f; font-weight: bold; margin-top: 10px;\"\u003e*Note: The color of the underglaze will change depending on your clay body and whether you use oxidation or reduction firing. Please test in your own kiln.\u003c\/p\u003e\n\u003ch2\u003e[Frequently Asked Questions]\u003c\/h2\u003e\n\u003cdl\u003e\n\u003cdt style=\"font-weight: bold; margin-top: 15px;\"\u003eQ: How do I use the pigment?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: It arrives in a highly concentrated paste form. Please dilute it with water according to your purpose. For line drawing (outlining), a general guide is 1 part Gosu to 3 parts water. For Dami (washes), use 1 teaspoon of Gosu to 80ml-250ml of water. Please adjust to find your ideal shade.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: Should I add a binder or adhesive (like gum arabic or CMC)?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Our Gosu does not contain added binders to allow you flexibility. If the pigment is not adhering well to your bisque ware, or if your painting process requires touching the surface repeatedly, we recommend adding a small amount of your preferred binder.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: How should I store it if I won't use it for a long time?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: We recommend storing it tightly sealed in the container. If it dries out, simply add water and grind it again in a mortar to return it to a paste.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: What causes the pigment to crawl or repel during firing?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Applying the pigment too thickly is the most common cause of crawling. It can also be caused by dust or oil (from hands) on the bisque ware before painting.\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003ch2\u003e[Shipping \u0026amp; Postage (International)]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/ZGVsaXZlcnlfMWRheQ.png?cmsp_timestamp=20240605194647\" alt=\"Fast Shipping\"\u003e\u003cbr\u003eIf you place your order \u003cu\u003ebefore noon (JST)\u003c\/u\u003e, it will generally be shipped \u003cspan style=\"color: #d32f2f;\"\u003e\u003cstrong\u003e\u003cu\u003ethe next business day\u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e from our factory in Japan.\u003cbr\u003e\u003cem\u003e*If your order includes made-to-order items like specific glazes, the entire order will be shipped once all items are ready.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAbout Shipping Fees:\u003c\/strong\u003e\u003cbr\u003eShipping costs are \u003cstrong\u003eautomatically calculated at checkout\u003c\/strong\u003e based on the total weight of your order and your delivery address (Country\/Region).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAvailable Shipping Methods:\u003c\/strong\u003e\u003cbr\u003eDuring checkout, you can choose the delivery method that best suits your needs.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eEMS (Express Mail Service)\u003c\/strong\u003e: Fast and reliable with tracking, but shipping fees are higher. Typically arrives in 3 to 7 days depending on the destination.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSurface Mail (Sea Mail)\u003c\/strong\u003e: The most economical option with lower shipping fees, but delivery is slow. It typically takes 1 to 3 months to arrive.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003e*Please note that customs duties or import taxes may apply upon arrival in your country, which are the responsibility of the buyer.\u003c\/em\u003e\u003c\/p\u003e","brand":"株式会社深海商店","offers":[{"title":"Paste 100g","offer_id":49064922054947,"sku":"100490","price":2300.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0523\/0115\/files\/080___EC-min.jpg?v=1770940708"},{"product_id":"167648985","title":"Dark Marudai underglaze (100g)","description":"\u003ch2\u003e[Quality \u0026amp; Craftsmanship]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"High quality Arita blue and white porcelain\" src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/Y2FwLTE0LW1pbg.jpg?cmsp_timestamp=20240605201618\"\u003e\u003cbr\u003eFor over half a century, blue and white porcelain (Sometsuke) and Somenishiki ware created using Fukaumi Shouten's Gosu (blue underglaze) have been beloved by royalty and aristocrats worldwide, and proudly exhibited in museums.\u003cbr\u003e\u003cbr\u003e\u003cstrong style=\"color: #005bd3;\"\u003eFeatured on the BBC and Japanese National Television\u003c\/strong\u003e\u003cbr\u003eOur profound history and traditional techniques caught the attention of the world when we were featured on the prestigious UK television series, \u003cstrong\u003eBBC's \u003cem\u003e\"Great Japanese Railway Journeys\"\u003c\/em\u003e\u003c\/strong\u003e.\u003cbr\u003eIn Japan, artists utilizing our Gosu have been featured on prominent programs such as \"Wafu Souhonke\" and NHK's \"Ippin,\" which highlight the nation's finest traditional craftsmanship.\u003cbr\u003e\u003cbr\u003eOur products are also trusted for official signage at research institutions and government agencies throughout Japan. We promise to deliver this world-recognized, authentic Arita Blue directly to your studio.\u003c\/p\u003e\n\u003ch2\u003e[The Manufacturing Process]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc\/DSC01766-min.jpg?cmsp_timestamp=20221222111934\" alt=\"Gosu production process with traditional stone mill\"\u003e\u003cbr\u003eTo maintain this exceptional quality, it takes more than a month from the start of production to completion for Fukaumi Shouten's Gosu.\u003cbr\u003e\u003cbr\u003eBy combining \u003cstrong\u003e\u003cu\u003eFukaumi Shouten's unique ingredient blend\u003c\/u\u003e\u003c\/strong\u003e, \u003cstrong\u003e\u003cu\u003eour proprietary firing technique (Calcination)\u003c\/u\u003e\u003c\/strong\u003e, and \u003cstrong\u003e\u003cu\u003ethe only stone-milling technology in Japan to micro-pulverize the grains\u003c\/u\u003e\u003c\/strong\u003e, we achieve the ultimate underglaze.\u003cbr\u003e\u003cbr\u003eThrough these rigorous processes, \u003cstrong\u003e\u003cu\u003ebrushstrokes become incredibly smooth, and the Gosu is highly resistant to burning out, even at high concentrations\u003c\/u\u003e\u003c\/strong\u003e.\u003cbr\u003e\u003cstrong\u003e\u003cu\u003eYou will not need to hand-grind the pigment yourself once it arrives; it is ready to use.\u003c\/u\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003eFukaumi Shouten is the only historic Gosu manufacturer that sells its products directly online to individuals worldwide. That is why we can offer authentic, professional-grade quality directly from our factory.\u003c\/p\u003e\n\u003cdiv class=\"youtube\" style=\"margin: 30px 0;\"\u003e\u003ciframe width=\"100%\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/1myOuT9yp4s?si=J6uVaUCtCXrHTky3\" title=\"Fukaumi Shouten Gosu Manufacturing Process\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003ch2\u003e[The History of Gosu in Arita]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0yNC1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Antique Arita ware showing traditional blue underglaze\"\u003e\u003cbr\u003eThe synthetic Gosu currently used throughout Japan was developed by the Fukaumi family during the early Meiji period (late 19th century).\u003cbr\u003e\u003cbr\u003eIn 1870, the renowned German chemist Gottfried Wagener was invited to Arita.\u003cbr\u003eDr. Wagener taught Heizaemon Fukaumi and his sons, Suminosuke and Takeji, the chemical method of producing the color blue using cobalt.\u003cbr\u003e\u003cbr\u003eFollowing this, the Fukaumi family conducted extensive research and successfully developed a scientific method for producing stable Gosu.\u003cbr\u003eAs a result, vivid and reliable synthetic Gosu began to be widely used in Arita and across Japan, establishing the world-famous \"Japan Blue\".\u003cbr\u003e\u003cbr\u003ePlease experience our premium Gosu, born from centuries of history, tradition, and the power of chemistry.\u003cbr\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0zNS1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Fukaumi Shouten Gosu powder and paste\" style=\"margin-top: 15px;\"\u003e\u003c\/p\u003e\n\u003ch2\u003e[How to Use]\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Type\u003c\/strong\u003e: Suitable for both Porcelain and Stoneware\/Earthenware.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Method\u003c\/strong\u003e: Suitable for both Oxidation and Reduction firing.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOptimal Firing Temperature\u003c\/strong\u003e: 1230°C – 1300°C (2246°F – 2372°F)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e[Firing Conditions for Sample Plates]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/MjAyNDAxR09TVV9zYW1wbGVzLW1pbg.jpg?cmsp_timestamp=20240605194159\" alt=\"Gosu color sample plates fired in reduction\"\u003e\u003cbr\u003eThe color samples shown in the main product images were fired under the following conditions:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Body\u003c\/strong\u003e: Amakusa Pottery Stone (Porcelain)\u003cbr\u003e\u003cspan style=\"font-size: 0.85em; color: #666;\"\u003e(Composition: SiO2 72.04%, Al2O3 18.16%, Fe2O3 0.65%, TiO2 0.04%, CaO 0.49%, MgO 0.09%, Na2O 0.58%, K2O 3.00%, Ig.Loss 4.55%)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Temperature \u0026amp; Atmosphere\u003c\/strong\u003e: 1280°C (2336°F) \/ Reduction Firing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"color: #d32f2f; font-weight: bold; margin-top: 10px;\"\u003e*Note: The color of the underglaze will change depending on your clay body and whether you use oxidation or reduction firing. Please test in your own kiln.\u003c\/p\u003e\n\u003ch2\u003e[Frequently Asked Questions]\u003c\/h2\u003e\n\u003cdl\u003e\n\u003cdt style=\"font-weight: bold; margin-top: 15px;\"\u003eQ: How do I use the pigment?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: It arrives in a highly concentrated paste form. Please dilute it with water according to your purpose. For line drawing (outlining), a general guide is 1 part Gosu to 3 parts water. For Dami (washes), use 1 teaspoon of Gosu to 80ml-250ml of water. Please adjust to find your ideal shade.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: Should I add a binder or adhesive (like gum arabic or CMC)?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Our Gosu does not contain added binders to allow you flexibility. If the pigment is not adhering well to your bisque ware, or if your painting process requires touching the surface repeatedly, we recommend adding a small amount of your preferred binder.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: How should I store it if I won't use it for a long time?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: We recommend storing it tightly sealed in the container. If it dries out, simply add water and grind it again in a mortar to return it to a paste.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: What causes the pigment to crawl or repel during firing?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Applying the pigment too thickly is the most common cause of crawling. It can also be caused by dust or oil (from hands) on the bisque ware before painting.\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003ch2\u003e[Shipping \u0026amp; Postage (International)]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/ZGVsaXZlcnlfMWRheQ.png?cmsp_timestamp=20240605194647\" alt=\"Fast Shipping\"\u003e\u003cbr\u003eIf you place your order \u003cu\u003ebefore noon (JST)\u003c\/u\u003e, it will generally be shipped \u003cspan style=\"color: #d32f2f;\"\u003e\u003cstrong\u003e\u003cu\u003ethe next business day\u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e from our factory in Japan.\u003cbr\u003e\u003cem\u003e*If your order includes made-to-order items like specific glazes, the entire order will be shipped once all items are ready.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAbout Shipping Fees:\u003c\/strong\u003e\u003cbr\u003eShipping costs are \u003cstrong\u003eautomatically calculated at checkout\u003c\/strong\u003e based on the total weight of your order and your delivery address (Country\/Region).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAvailable Shipping Methods:\u003c\/strong\u003e\u003cbr\u003eDuring checkout, you can choose the delivery method that best suits your needs.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eEMS (Express Mail Service)\u003c\/strong\u003e: Fast and reliable with tracking, but shipping fees are higher. Typically arrives in 3 to 7 days depending on the destination.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSurface Mail (Sea Mail)\u003c\/strong\u003e: The most economical option with lower shipping fees, but delivery is slow. It typically takes 1 to 3 months to arrive.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003e*Please note that customs duties or import taxes may apply upon arrival in your country, which are the responsibility of the buyer.\u003c\/em\u003e\u003c\/p\u003e","brand":"株式会社深海商店","offers":[{"title":"Paste 100g","offer_id":49064971764003,"sku":"101790","price":2700.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0523\/0115\/files\/034___EC-min.jpg?v=1723448323"},{"product_id":"167649018","title":"Marudai Gosu underglaze (100g)","description":"\u003ch2\u003e[Quality \u0026amp; Craftsmanship]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"High quality Arita blue and white porcelain\" src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/Y2FwLTE0LW1pbg.jpg?cmsp_timestamp=20240605201618\"\u003e\u003cbr\u003eFor over half a century, blue and white porcelain (Sometsuke) and Somenishiki ware created using Fukaumi Shouten's Gosu (blue underglaze) have been beloved by royalty and aristocrats worldwide, and proudly exhibited in museums.\u003cbr\u003e\u003cbr\u003e\u003cstrong style=\"color: #005bd3;\"\u003eFeatured on the BBC and Japanese National Television\u003c\/strong\u003e\u003cbr\u003eOur profound history and traditional techniques caught the attention of the world when we were featured on the prestigious UK television series, \u003cstrong\u003eBBC's \u003cem\u003e\"Great Japanese Railway Journeys\"\u003c\/em\u003e\u003c\/strong\u003e.\u003cbr\u003eIn Japan, artists utilizing our Gosu have been featured on prominent programs such as \"Wafu Souhonke\" and NHK's \"Ippin,\" which highlight the nation's finest traditional craftsmanship.\u003cbr\u003e\u003cbr\u003eOur products are also trusted for official signage at research institutions and government agencies throughout Japan. We promise to deliver this world-recognized, authentic Arita Blue directly to your studio.\u003c\/p\u003e\n\u003ch2\u003e[The Manufacturing Process]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc\/DSC01766-min.jpg?cmsp_timestamp=20221222111934\" alt=\"Gosu production process with traditional stone mill\"\u003e\u003cbr\u003eTo maintain this exceptional quality, it takes more than a month from the start of production to completion for Fukaumi Shouten's Gosu.\u003cbr\u003e\u003cbr\u003eBy combining \u003cstrong\u003e\u003cu\u003eFukaumi Shouten's unique ingredient blend\u003c\/u\u003e\u003c\/strong\u003e, \u003cstrong\u003e\u003cu\u003eour proprietary firing technique (Calcination)\u003c\/u\u003e\u003c\/strong\u003e, and \u003cstrong\u003e\u003cu\u003ethe only stone-milling technology in Japan to micro-pulverize the grains\u003c\/u\u003e\u003c\/strong\u003e, we achieve the ultimate underglaze.\u003cbr\u003e\u003cbr\u003eThrough these rigorous processes, \u003cstrong\u003e\u003cu\u003ebrushstrokes become incredibly smooth, and the Gosu is highly resistant to burning out, even at high concentrations\u003c\/u\u003e\u003c\/strong\u003e.\u003cbr\u003e\u003cstrong\u003e\u003cu\u003eYou will not need to hand-grind the pigment yourself once it arrives; it is ready to use.\u003c\/u\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003eFukaumi Shouten is the only historic Gosu manufacturer that sells its products directly online to individuals worldwide. That is why we can offer authentic, professional-grade quality directly from our factory.\u003c\/p\u003e\n\u003cdiv class=\"youtube\" style=\"margin: 30px 0;\"\u003e\u003ciframe width=\"100%\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/1myOuT9yp4s?si=J6uVaUCtCXrHTky3\" title=\"Fukaumi Shouten Gosu Manufacturing Process\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003ch2\u003e[The History of Gosu in Arita]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0yNC1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Antique Arita ware showing traditional blue underglaze\"\u003e\u003cbr\u003eThe synthetic Gosu currently used throughout Japan was developed by the Fukaumi family during the early Meiji period (late 19th century).\u003cbr\u003e\u003cbr\u003eIn 1870, the renowned German chemist Gottfried Wagener was invited to Arita.\u003cbr\u003eDr. Wagener taught Heizaemon Fukaumi and his sons, Suminosuke and Takeji, the chemical method of producing the color blue using cobalt.\u003cbr\u003e\u003cbr\u003eFollowing this, the Fukaumi family conducted extensive research and successfully developed a scientific method for producing stable Gosu.\u003cbr\u003eAs a result, vivid and reliable synthetic Gosu began to be widely used in Arita and across Japan, establishing the world-famous \"Japan Blue\".\u003cbr\u003e\u003cbr\u003ePlease experience our premium Gosu, born from centuries of history, tradition, and the power of chemistry.\u003cbr\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0zNS1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Fukaumi Shouten Gosu powder and paste\" style=\"margin-top: 15px;\"\u003e\u003c\/p\u003e\n\u003ch2\u003e[How to Use]\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Type\u003c\/strong\u003e: Suitable for both Porcelain and Stoneware\/Earthenware.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Method\u003c\/strong\u003e: Suitable for both Oxidation and Reduction firing.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOptimal Firing Temperature\u003c\/strong\u003e: 1230°C – 1300°C (2246°F – 2372°F)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e[Firing Conditions for Sample Plates]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/MjAyNDAxR09TVV9zYW1wbGVzLW1pbg.jpg?cmsp_timestamp=20240605194159\" alt=\"Gosu color sample plates fired in reduction\"\u003e\u003cbr\u003eThe color samples shown in the main product images were fired under the following conditions:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Body\u003c\/strong\u003e: Amakusa Pottery Stone (Porcelain)\u003cbr\u003e\u003cspan style=\"font-size: 0.85em; color: #666;\"\u003e(Composition: SiO2 72.04%, Al2O3 18.16%, Fe2O3 0.65%, TiO2 0.04%, CaO 0.49%, MgO 0.09%, Na2O 0.58%, K2O 3.00%, Ig.Loss 4.55%)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Temperature \u0026amp; Atmosphere\u003c\/strong\u003e: 1280°C (2336°F) \/ Reduction Firing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"color: #d32f2f; font-weight: bold; margin-top: 10px;\"\u003e*Note: The color of the underglaze will change depending on your clay body and whether you use oxidation or reduction firing. Please test in your own kiln.\u003c\/p\u003e\n\u003ch2\u003e[Frequently Asked Questions]\u003c\/h2\u003e\n\u003cdl\u003e\n\u003cdt style=\"font-weight: bold; margin-top: 15px;\"\u003eQ: How do I use the pigment?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: It arrives in a highly concentrated paste form. Please dilute it with water according to your purpose. For line drawing (outlining), a general guide is 1 part Gosu to 3 parts water. For Dami (washes), use 1 teaspoon of Gosu to 80ml-250ml of water. Please adjust to find your ideal shade.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: Should I add a binder or adhesive (like gum arabic or CMC)?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Our Gosu does not contain added binders to allow you flexibility. If the pigment is not adhering well to your bisque ware, or if your painting process requires touching the surface repeatedly, we recommend adding a small amount of your preferred binder.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: How should I store it if I won't use it for a long time?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: We recommend storing it tightly sealed in the container. If it dries out, simply add water and grind it again in a mortar to return it to a paste.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: What causes the pigment to crawl or repel during firing?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Applying the pigment too thickly is the most common cause of crawling. It can also be caused by dust or oil (from hands) on the bisque ware before painting.\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003ch2\u003e[Shipping \u0026amp; Postage (International)]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/ZGVsaXZlcnlfMWRheQ.png?cmsp_timestamp=20240605194647\" alt=\"Fast Shipping\"\u003e\u003cbr\u003eIf you place your order \u003cu\u003ebefore noon (JST)\u003c\/u\u003e, it will generally be shipped \u003cspan style=\"color: #d32f2f;\"\u003e\u003cstrong\u003e\u003cu\u003ethe next business day\u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e from our factory in Japan.\u003cbr\u003e\u003cem\u003e*If your order includes made-to-order items like specific glazes, the entire order will be shipped once all items are ready.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAbout Shipping Fees:\u003c\/strong\u003e\u003cbr\u003eShipping costs are \u003cstrong\u003eautomatically calculated at checkout\u003c\/strong\u003e based on the total weight of your order and your delivery address (Country\/Region).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAvailable Shipping Methods:\u003c\/strong\u003e\u003cbr\u003eDuring checkout, you can choose the delivery method that best suits your needs.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eEMS (Express Mail Service)\u003c\/strong\u003e: Fast and reliable with tracking, but shipping fees are higher. Typically arrives in 3 to 7 days depending on the destination.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSurface Mail (Sea Mail)\u003c\/strong\u003e: The most economical option with lower shipping fees, but delivery is slow. It typically takes 1 to 3 months to arrive.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003e*Please note that customs duties or import taxes may apply upon arrival in your country, which are the responsibility of the buyer.\u003c\/em\u003e\u003c\/p\u003e","brand":"株式会社深海商店","offers":[{"title":"Paste 100g","offer_id":49064987296035,"sku":"100050","price":2500.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0523\/0115\/files\/058___EC-min.jpg?v=1770940686"},{"product_id":"167649039","title":"Maruharuri Gosu underglaze (100g)","description":"\u003ch2\u003e[Quality \u0026amp; Craftsmanship]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"High quality Arita blue and white porcelain\" src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/Y2FwLTE0LW1pbg.jpg?cmsp_timestamp=20240605201618\"\u003e\u003cbr\u003eFor over half a century, blue and white porcelain (Sometsuke) and Somenishiki ware created using Fukaumi Shouten's Gosu (blue underglaze) have been beloved by royalty and aristocrats worldwide, and proudly exhibited in museums.\u003cbr\u003e\u003cbr\u003e\u003cstrong style=\"color: #005bd3;\"\u003eFeatured on the BBC and Japanese National Television\u003c\/strong\u003e\u003cbr\u003eOur profound history and traditional techniques caught the attention of the world when we were featured on the prestigious UK television series, \u003cstrong\u003eBBC's \u003cem\u003e\"Great Japanese Railway Journeys\"\u003c\/em\u003e\u003c\/strong\u003e.\u003cbr\u003eIn Japan, artists utilizing our Gosu have been featured on prominent programs such as \"Wafu Souhonke\" and NHK's \"Ippin,\" which highlight the nation's finest traditional craftsmanship.\u003cbr\u003e\u003cbr\u003eOur products are also trusted for official signage at research institutions and government agencies throughout Japan. We promise to deliver this world-recognized, authentic Arita Blue directly to your studio.\u003c\/p\u003e\n\u003ch2\u003e[The Manufacturing Process]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc\/DSC01766-min.jpg?cmsp_timestamp=20221222111934\" alt=\"Gosu production process with traditional stone mill\"\u003e\u003cbr\u003eTo maintain this exceptional quality, it takes more than a month from the start of production to completion for Fukaumi Shouten's Gosu.\u003cbr\u003e\u003cbr\u003eBy combining \u003cstrong\u003e\u003cu\u003eFukaumi Shouten's unique ingredient blend\u003c\/u\u003e\u003c\/strong\u003e, \u003cstrong\u003e\u003cu\u003eour proprietary firing technique (Calcination)\u003c\/u\u003e\u003c\/strong\u003e, and \u003cstrong\u003e\u003cu\u003ethe only stone-milling technology in Japan to micro-pulverize the grains\u003c\/u\u003e\u003c\/strong\u003e, we achieve the ultimate underglaze.\u003cbr\u003e\u003cbr\u003eThrough these rigorous processes, \u003cstrong\u003e\u003cu\u003ebrushstrokes become incredibly smooth, and the Gosu is highly resistant to burning out, even at high concentrations\u003c\/u\u003e\u003c\/strong\u003e.\u003cbr\u003e\u003cstrong\u003e\u003cu\u003eYou will not need to hand-grind the pigment yourself once it arrives; it is ready to use.\u003c\/u\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003eFukaumi Shouten is the only historic Gosu manufacturer that sells its products directly online to individuals worldwide. That is why we can offer authentic, professional-grade quality directly from our factory.\u003c\/p\u003e\n\u003cdiv class=\"youtube\" style=\"margin: 30px 0;\"\u003e\u003ciframe width=\"100%\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/1myOuT9yp4s?si=J6uVaUCtCXrHTky3\" title=\"Fukaumi Shouten Gosu Manufacturing Process\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003ch2\u003e[The History of Gosu in Arita]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0yNC1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Antique Arita ware showing traditional blue underglaze\"\u003e\u003cbr\u003eThe synthetic Gosu currently used throughout Japan was developed by the Fukaumi family during the early Meiji period (late 19th century).\u003cbr\u003e\u003cbr\u003eIn 1870, the renowned German chemist Gottfried Wagener was invited to Arita.\u003cbr\u003eDr. Wagener taught Heizaemon Fukaumi and his sons, Suminosuke and Takeji, the chemical method of producing the color blue using cobalt.\u003cbr\u003e\u003cbr\u003eFollowing this, the Fukaumi family conducted extensive research and successfully developed a scientific method for producing stable Gosu.\u003cbr\u003eAs a result, vivid and reliable synthetic Gosu began to be widely used in Arita and across Japan, establishing the world-famous \"Japan Blue\".\u003cbr\u003e\u003cbr\u003ePlease experience our premium Gosu, born from centuries of history, tradition, and the power of chemistry.\u003cbr\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0zNS1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Fukaumi Shouten Gosu powder and paste\" style=\"margin-top: 15px;\"\u003e\u003c\/p\u003e\n\u003ch2\u003e[How to Use]\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Type\u003c\/strong\u003e: Suitable for both Porcelain and Stoneware\/Earthenware.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Method\u003c\/strong\u003e: Suitable for both Oxidation and Reduction firing.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOptimal Firing Temperature\u003c\/strong\u003e: 1230°C – 1300°C (2246°F – 2372°F)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e[Firing Conditions for Sample Plates]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/MjAyNDAxR09TVV9zYW1wbGVzLW1pbg.jpg?cmsp_timestamp=20240605194159\" alt=\"Gosu color sample plates fired in reduction\"\u003e\u003cbr\u003eThe color samples shown in the main product images were fired under the following conditions:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Body\u003c\/strong\u003e: Amakusa Pottery Stone (Porcelain)\u003cbr\u003e\u003cspan style=\"font-size: 0.85em; color: #666;\"\u003e(Composition: SiO2 72.04%, Al2O3 18.16%, Fe2O3 0.65%, TiO2 0.04%, CaO 0.49%, MgO 0.09%, Na2O 0.58%, K2O 3.00%, Ig.Loss 4.55%)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Temperature \u0026amp; Atmosphere\u003c\/strong\u003e: 1280°C (2336°F) \/ Reduction Firing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"color: #d32f2f; font-weight: bold; margin-top: 10px;\"\u003e*Note: The color of the underglaze will change depending on your clay body and whether you use oxidation or reduction firing. Please test in your own kiln.\u003c\/p\u003e\n\u003ch2\u003e[Frequently Asked Questions]\u003c\/h2\u003e\n\u003cdl\u003e\n\u003cdt style=\"font-weight: bold; margin-top: 15px;\"\u003eQ: How do I use the pigment?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: It arrives in a highly concentrated paste form. Please dilute it with water according to your purpose. For line drawing (outlining), a general guide is 1 part Gosu to 3 parts water. For Dami (washes), use 1 teaspoon of Gosu to 80ml-250ml of water. Please adjust to find your ideal shade.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: Should I add a binder or adhesive (like gum arabic or CMC)?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Our Gosu does not contain added binders to allow you flexibility. If the pigment is not adhering well to your bisque ware, or if your painting process requires touching the surface repeatedly, we recommend adding a small amount of your preferred binder.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: How should I store it if I won't use it for a long time?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: We recommend storing it tightly sealed in the container. If it dries out, simply add water and grind it again in a mortar to return it to a paste.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: What causes the pigment to crawl or repel during firing?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Applying the pigment too thickly is the most common cause of crawling. It can also be caused by dust or oil (from hands) on the bisque ware before painting.\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003ch2\u003e[Shipping \u0026amp; Postage (International)]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/ZGVsaXZlcnlfMWRheQ.png?cmsp_timestamp=20240605194647\" alt=\"Fast Shipping\"\u003e\u003cbr\u003eIf you place your order \u003cu\u003ebefore noon (JST)\u003c\/u\u003e, it will generally be shipped \u003cspan style=\"color: #d32f2f;\"\u003e\u003cstrong\u003e\u003cu\u003ethe next business day\u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e from our factory in Japan.\u003cbr\u003e\u003cem\u003e*If your order includes made-to-order items like specific glazes, the entire order will be shipped once all items are ready.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAbout Shipping Fees:\u003c\/strong\u003e\u003cbr\u003eShipping costs are \u003cstrong\u003eautomatically calculated at checkout\u003c\/strong\u003e based on the total weight of your order and your delivery address (Country\/Region).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAvailable Shipping Methods:\u003c\/strong\u003e\u003cbr\u003eDuring checkout, you can choose the delivery method that best suits your needs.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eEMS (Express Mail Service)\u003c\/strong\u003e: Fast and reliable with tracking, but shipping fees are higher. Typically arrives in 3 to 7 days depending on the destination.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSurface Mail (Sea Mail)\u003c\/strong\u003e: The most economical option with lower shipping fees, but delivery is slow. It typically takes 1 to 3 months to arrive.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003e*Please note that customs duties or import taxes may apply upon arrival in your country, which are the responsibility of the buyer.\u003c\/em\u003e\u003c\/p\u003e","brand":"株式会社深海商店","offers":[{"title":"Paste 100g","offer_id":49064992866595,"sku":"100080","price":2400.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0523\/0115\/files\/081___EC-min.jpg?v=1723448376"},{"product_id":"167649057","title":"Marugen Gosu underglaze (100g)","description":"\u003ch2\u003e[Quality \u0026amp; Craftsmanship]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"High quality Arita blue and white porcelain\" src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/Y2FwLTE0LW1pbg.jpg?cmsp_timestamp=20240605201618\"\u003e\u003cbr\u003eFor over half a century, blue and white porcelain (Sometsuke) and Somenishiki ware created using Fukaumi Shouten's Gosu (blue underglaze) have been beloved by royalty and aristocrats worldwide, and proudly exhibited in museums.\u003cbr\u003e\u003cbr\u003e\u003cstrong style=\"color: #005bd3;\"\u003eFeatured on the BBC and Japanese National Television\u003c\/strong\u003e\u003cbr\u003eOur profound history and traditional techniques caught the attention of the world when we were featured on the prestigious UK television series, \u003cstrong\u003eBBC's \u003cem\u003e\"Great Japanese Railway Journeys\"\u003c\/em\u003e\u003c\/strong\u003e.\u003cbr\u003eIn Japan, artists utilizing our Gosu have been featured on prominent programs such as \"Wafu Souhonke\" and NHK's \"Ippin,\" which highlight the nation's finest traditional craftsmanship.\u003cbr\u003e\u003cbr\u003eOur products are also trusted for official signage at research institutions and government agencies throughout Japan. We promise to deliver this world-recognized, authentic Arita Blue directly to your studio.\u003c\/p\u003e\n\u003ch2\u003e[The Manufacturing Process]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc\/DSC01766-min.jpg?cmsp_timestamp=20221222111934\" alt=\"Gosu production process with traditional stone mill\"\u003e\u003cbr\u003eTo maintain this exceptional quality, it takes more than a month from the start of production to completion for Fukaumi Shouten's Gosu.\u003cbr\u003e\u003cbr\u003eBy combining \u003cstrong\u003e\u003cu\u003eFukaumi Shouten's unique ingredient blend\u003c\/u\u003e\u003c\/strong\u003e, \u003cstrong\u003e\u003cu\u003eour proprietary firing technique (Calcination)\u003c\/u\u003e\u003c\/strong\u003e, and \u003cstrong\u003e\u003cu\u003ethe only stone-milling technology in Japan to micro-pulverize the grains\u003c\/u\u003e\u003c\/strong\u003e, we achieve the ultimate underglaze.\u003cbr\u003e\u003cbr\u003eThrough these rigorous processes, \u003cstrong\u003e\u003cu\u003ebrushstrokes become incredibly smooth, and the Gosu is highly resistant to burning out, even at high concentrations\u003c\/u\u003e\u003c\/strong\u003e.\u003cbr\u003e\u003cstrong\u003e\u003cu\u003eYou will not need to hand-grind the pigment yourself once it arrives; it is ready to use.\u003c\/u\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003eFukaumi Shouten is the only historic Gosu manufacturer that sells its products directly online to individuals worldwide. That is why we can offer authentic, professional-grade quality directly from our factory.\u003c\/p\u003e\n\u003cdiv class=\"youtube\" style=\"margin: 30px 0;\"\u003e\u003ciframe width=\"100%\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/1myOuT9yp4s?si=J6uVaUCtCXrHTky3\" title=\"Fukaumi Shouten Gosu Manufacturing Process\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003ch2\u003e[The History of Gosu in Arita]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0yNC1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Antique Arita ware showing traditional blue underglaze\"\u003e\u003cbr\u003eThe synthetic Gosu currently used throughout Japan was developed by the Fukaumi family during the early Meiji period (late 19th century).\u003cbr\u003e\u003cbr\u003eIn 1870, the renowned German chemist Gottfried Wagener was invited to Arita.\u003cbr\u003eDr. Wagener taught Heizaemon Fukaumi and his sons, Suminosuke and Takeji, the chemical method of producing the color blue using cobalt.\u003cbr\u003e\u003cbr\u003eFollowing this, the Fukaumi family conducted extensive research and successfully developed a scientific method for producing stable Gosu.\u003cbr\u003eAs a result, vivid and reliable synthetic Gosu began to be widely used in Arita and across Japan, establishing the world-famous \"Japan Blue\".\u003cbr\u003e\u003cbr\u003ePlease experience our premium Gosu, born from centuries of history, tradition, and the power of chemistry.\u003cbr\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0zNS1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Fukaumi Shouten Gosu powder and paste\" style=\"margin-top: 15px;\"\u003e\u003c\/p\u003e\n\u003ch2\u003e[How to Use]\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Type\u003c\/strong\u003e: Suitable for both Porcelain and Stoneware\/Earthenware.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Method\u003c\/strong\u003e: Suitable for both Oxidation and Reduction firing.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOptimal Firing Temperature\u003c\/strong\u003e: 1230°C – 1300°C (2246°F – 2372°F)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e[Firing Conditions for Sample Plates]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/MjAyNDAxR09TVV9zYW1wbGVzLW1pbg.jpg?cmsp_timestamp=20240605194159\" alt=\"Gosu color sample plates fired in reduction\"\u003e\u003cbr\u003eThe color samples shown in the main product images were fired under the following conditions:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Body\u003c\/strong\u003e: Amakusa Pottery Stone (Porcelain)\u003cbr\u003e\u003cspan style=\"font-size: 0.85em; color: #666;\"\u003e(Composition: SiO2 72.04%, Al2O3 18.16%, Fe2O3 0.65%, TiO2 0.04%, CaO 0.49%, MgO 0.09%, Na2O 0.58%, K2O 3.00%, Ig.Loss 4.55%)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Temperature \u0026amp; Atmosphere\u003c\/strong\u003e: 1280°C (2336°F) \/ Reduction Firing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"color: #d32f2f; font-weight: bold; margin-top: 10px;\"\u003e*Note: The color of the underglaze will change depending on your clay body and whether you use oxidation or reduction firing. Please test in your own kiln.\u003c\/p\u003e\n\u003ch2\u003e[Frequently Asked Questions]\u003c\/h2\u003e\n\u003cdl\u003e\n\u003cdt style=\"font-weight: bold; margin-top: 15px;\"\u003eQ: How do I use the pigment?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: It arrives in a highly concentrated paste form. Please dilute it with water according to your purpose. For line drawing (outlining), a general guide is 1 part Gosu to 3 parts water. For Dami (washes), use 1 teaspoon of Gosu to 80ml-250ml of water. Please adjust to find your ideal shade.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: Should I add a binder or adhesive (like gum arabic or CMC)?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Our Gosu does not contain added binders to allow you flexibility. If the pigment is not adhering well to your bisque ware, or if your painting process requires touching the surface repeatedly, we recommend adding a small amount of your preferred binder.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: How should I store it if I won't use it for a long time?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: We recommend storing it tightly sealed in the container. If it dries out, simply add water and grind it again in a mortar to return it to a paste.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: What causes the pigment to crawl or repel during firing?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Applying the pigment too thickly is the most common cause of crawling. It can also be caused by dust or oil (from hands) on the bisque ware before painting.\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003ch2\u003e[Shipping \u0026amp; Postage (International)]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/ZGVsaXZlcnlfMWRheQ.png?cmsp_timestamp=20240605194647\" alt=\"Fast Shipping\"\u003e\u003cbr\u003eIf you place your order \u003cu\u003ebefore noon (JST)\u003c\/u\u003e, it will generally be shipped \u003cspan style=\"color: #d32f2f;\"\u003e\u003cstrong\u003e\u003cu\u003ethe next business day\u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e from our factory in Japan.\u003cbr\u003e\u003cem\u003e*If your order includes made-to-order items like specific glazes, the entire order will be shipped once all items are ready.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAbout Shipping Fees:\u003c\/strong\u003e\u003cbr\u003eShipping costs are \u003cstrong\u003eautomatically calculated at checkout\u003c\/strong\u003e based on the total weight of your order and your delivery address (Country\/Region).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAvailable Shipping Methods:\u003c\/strong\u003e\u003cbr\u003eDuring checkout, you can choose the delivery method that best suits your needs.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eEMS (Express Mail Service)\u003c\/strong\u003e: Fast and reliable with tracking, but shipping fees are higher. Typically arrives in 3 to 7 days depending on the destination.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSurface Mail (Sea Mail)\u003c\/strong\u003e: The most economical option with lower shipping fees, but delivery is slow. It typically takes 1 to 3 months to arrive.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003e*Please note that customs duties or import taxes may apply upon arrival in your country, which are the responsibility of the buyer.\u003c\/em\u003e\u003c\/p\u003e","brand":"株式会社深海商店","offers":[{"title":"Paste 100g","offer_id":49064998240547,"sku":"100460","price":2200.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0523\/0115\/files\/046___EC-min.jpg?v=1723448407"},{"product_id":"167649074","title":"Maroon (100g)","description":"\u003cspan style=\"color:#0000FF\"\u003e\u003cspan style=\"font-size:large;\"\u003e\u003cstrong\u003e【quality】\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e \u003cbr\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc\/DSC01781-min.jpg?cmsp_timestamp=20221222112023\" alt=\"marble stone\"\u003e\u003cbr\u003e Shinkai Shoten's works using gosu have been around for over half a century.\u003cbr\u003e They are cherished by royalty and aristocrats from around the world and are also exhibited in museums.\u003cbr\u003e\u003cbr\u003e In addition, Shinkai Shoten was featured on Wafu Souhonke (Osaka TV), a show that promotes the best of Japan.\u003cbr\u003e The NHK program \"Ippin,\" which promotes Japan's excellent traditional performing arts, featured an artist who uses Shinkai Shoten's gosu blue and white porcelain.\u003cbr\u003e\u003cbr\u003e It is also used for signs for research institutions and government agencies.\u003cbr\u003e \u003cbr\u003e\u003cspan style=\"color:#0000FF\"\u003e\u003cspan style=\"font-size:large;\"\u003e\u003cstrong\u003e[Manufacturing process]\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e \u003cbr\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc\/DSC01766-min.jpg?cmsp_timestamp=20221222111934\" alt=\"production\"\u003e\u003cbr\u003e To maintain this high quality,\u003cbr\u003e It takes one month from the start of production to completion for Shinkai Shoten's gosu.\u003cbr\u003e (We have gosu in stock, so we can deliver your order immediately after placing it. Don't worry.)\u003cbr\u003e\u003cbr\u003e \u003cstrong\u003e\u003cu\u003eShinkai Shoten's unique blend of ingredients\u003c\/u\u003e ,\u003cbr\u003e \u003cu\u003eShinkai Shoten's unique gosu firing technique\u003c\/u\u003e ,\u003cbr\u003e \u003cu\u003eShinkai Shoten's unique technology for refining the particles of gosu\u003c\/u\u003e\u003c\/strong\u003e . By going through these processes, \u003cstrong\u003e\u003cu\u003ethe ink feels smooth to apply and is less likely to burn even when the gosu is highly concentrated\u003c\/u\u003e\u003c\/strong\u003e .\u003cbr\u003e\u003cbr\u003e \u003cspan style=\"color:#0000FF\"\u003e\u003cspan style=\"font-size:large;\"\u003e\u003cstrong\u003e[History of Gosu]\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e \u003cbr\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc\/DSC01929-min.jpg?cmsp_timestamp=20221222112204\" alt=\"\"\u003e\u003cbr\u003e The chemical gosu currently used in Japan began to be developed by the Shinkai family during the Meiji period.\u003cbr\u003e \u003cbr\u003eIn 1870, the German chemist Wagner came to Arita because he was knowledgeable about science.\u003cbr\u003e\u003cbr\u003e Mr. Wagner tells Shinkai Heizaemon, Suminosuke, and Takeji (father and son) that in Germany, cobalt is used to produce the color blue.\u003cbr\u003e\u003cbr\u003e After hearing this story, the Shinkai family conducted extensive research and developed a scientific method for producing gosu using cobalt as the main ingredient.\u003cbr\u003e\u003cbr\u003e As a result, synthetic gosu, which was inexpensive and had good color development, began to be used in Arita and other parts of Japan.\u003cbr\u003e\u003cbr\u003e Shinkai Shoten is the only manufacturer of gosu in the Arita ware production area that sells directly online.\u003cbr\u003e\u003cbr\u003e That's why we are able to offer such high quality at low prices.\u003cbr\u003e\u003cbr\u003e \u003cstrong\u003e\u003cu\u003ePlease try our high-quality gosu, which is made using history, tradition, and the power of chemistry.\u003c\/u\u003e\u003c\/strong\u003e \u003cbr\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc\/DSC01889-min.jpg?cmsp_timestamp=20221222112113\" alt=\"gosu underglaze\"\u003e\u003cbr\u003e\u003cbr\u003e \u003cspan style=\"color:#0000FF\"\u003e\u003cspan style=\"font-size:large;\"\u003e\u003cstrong\u003e[How to use]\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e \u003cbr\u003e\u003cu\u003eSoil type\u003c\/u\u003e : Porcelain and ceramics possible\u003cbr\u003e \u003cu\u003eFiring method\u003c\/u\u003e : Oxidation and reduction possible\u003cbr\u003e \u003cu\u003eSuitable firing temperature\u003c\/u\u003e : 1230-1300℃\u003cbr\u003e\u003cbr\u003e \u003cspan style=\"color:#0000FF\"\u003e\u003cspan style=\"font-size:large;\"\u003e\u003cstrong\u003e[Frequently Asked Questions]\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cbr\u003e \u003cu\u003eQ: How do I use the paint?\u003c\/u\u003e\u003cbr\u003e A: It is in a paste form, so please dilute it with water according to the purpose. For line drawing, use about twice the amount of water as the paint (dark, medium, light). Since there are individual differences in the color of the paint and brush strokes, please use this as a guide only.\u003cbr\u003e\u003cbr\u003e \u003cu\u003eQ: Should I add an adhesive such as gum arabic?\u003c\/u\u003e\u003cbr\u003e A: If the paint is not compatible with the fabric or if there is a process that requires the painted surface to be touched by hands repeatedly, it may be better to add a small amount.\u003cbr\u003e \u003cbr\u003e\u003cu\u003eQ: How should I store paints that I won't be using for a long period of time?\u003c\/u\u003e\u003cbr\u003e A: We recommend storing it in an airtight container. If it dries out, grind it again in a mortar and pestle, add water, and use it to make it into a paste.\u003cbr\u003e\u003cbr\u003e \u003cu\u003eQ: The paint settles and is difficult to use. Is there a solution?\u003c\/u\u003e\u003cbr\u003e A: The response will vary depending on the condition of the paint, so if you contact us we will explain the appropriate course of action.\u003cbr\u003e\u003cbr\u003e \u003cu\u003eQ: What causes paint to repel?\u003c\/u\u003e\u003cbr\u003e A: If you use too much paint, it may repel. It may also be caused by the storage conditions of the paint, so please contact us.\u003cbr\u003e\u003cbr\u003e \u003cspan style=\"color:#0000FF\"\u003e\u003cspan style=\"font-size:large;\"\u003e\u003cstrong\u003e[Firing conditions for sample plates]\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e \u003cbr\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc\/DSC01941-min.jpg?cmsp_timestamp=20221222113051\" alt=\"\"\u003e\u003cbr\u003e・\u003cu\u003eCeramic clay ingredients\u003c\/u\u003e \u0026lt;br\u0026gt;Amakusa selection\u003cbr\u003e (SiO2 72.04% Al2O3 18.16% Fe2O3 0.65% TiO2 0.04% CaO 0.49% MgO 0.09% Na2O 0.58% K2O 3.00% Ig.Loss 4.55%)\u003cbr\u003e\u003cbr\u003e・\u003cu\u003eFiring temperature (reduction)\u003c\/u\u003e\u003cbr\u003e 1280℃\u003cbr\u003e\u003cbr\u003e \u003cbr\u003e\u003cspan style=\"color:#0000FF\"\u003e\u003cspan style=\"font-size:large;\"\u003e\u003cstrong\u003e【postage】\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e \u003cbr\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc\/delivery.jpg?cmsp_timestamp=20221222112436\" alt=\"\"\u003e\u003cbr\u003e Nationwide uniform\u003cbr\u003e For purchases of less than 3,000 yen, the price is 880 yen (tax included)\u003cbr\u003e For purchases of 3,000 yen or more, 550 yen (tax included)\u003cbr\u003e\u003cbr\u003e \u003cspan style=\"font-size:large;\"\u003e\u003cspan style=\"color:#0000FF\"\u003e\u003cstrong\u003e【shipping】\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e \u003cbr\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc\/tomorrow.jpg?cmsp_timestamp=20221222112512\" alt=\"\"\u003e\u003cbr\u003e If you place your order \u003cu\u003ebefore noon\u003c\/u\u003e , it will be shipped \u003cspan style=\"color:#FF0000\"\u003e\u003cstrong\u003e\u003cu\u003ethe next business day\u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e .\u003cbr\u003e If other ordered items, such as made-to-order glazes, take longer to manufacture, we will ship your order accordingly.","brand":"株式会社深海商店","offers":[{"title":"Paste 100g","offer_id":49065534685475,"sku":"100630","price":2200.0,"currency_code":"JPY","in_stock":true},{"title":"Dry flour 100g","offer_id":49065534718243,"sku":"100631","price":3600.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0523\/0115\/files\/093___EC-min.jpg?v=1723467470"},{"product_id":"167649160","title":"Dark Lapis Gosu underglaze (100g)","description":"\u003ch2\u003e[Quality \u0026amp; Craftsmanship]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"High quality Arita blue and white porcelain\" src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/Y2FwLTE0LW1pbg.jpg?cmsp_timestamp=20240605201618\"\u003e\u003cbr\u003eFor over half a century, blue and white porcelain (Sometsuke) and Somenishiki ware created using Fukaumi Shouten's Gosu (blue underglaze) have been beloved by royalty and aristocrats worldwide, and proudly exhibited in museums.\u003cbr\u003e\u003cbr\u003e\u003cstrong style=\"color: #005bd3;\"\u003eFeatured on the BBC and Japanese National Television\u003c\/strong\u003e\u003cbr\u003eOur profound history and traditional techniques caught the attention of the world when we were featured on the prestigious UK television series, \u003cstrong\u003eBBC's \u003cem\u003e\"Great Japanese Railway Journeys\"\u003c\/em\u003e\u003c\/strong\u003e.\u003cbr\u003eIn Japan, artists utilizing our Gosu have been featured on prominent programs such as \"Wafu Souhonke\" and NHK's \"Ippin,\" which highlight the nation's finest traditional craftsmanship.\u003cbr\u003e\u003cbr\u003eOur products are also trusted for official signage at research institutions and government agencies throughout Japan. We promise to deliver this world-recognized, authentic Arita Blue directly to your studio.\u003c\/p\u003e\n\u003ch2\u003e[The Manufacturing Process]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc\/DSC01766-min.jpg?cmsp_timestamp=20221222111934\" alt=\"Gosu production process with traditional stone mill\"\u003e\u003cbr\u003eTo maintain this exceptional quality, it takes more than a month from the start of production to completion for Fukaumi Shouten's Gosu.\u003cbr\u003e\u003cbr\u003eBy combining \u003cstrong\u003e\u003cu\u003eFukaumi Shouten's unique ingredient blend\u003c\/u\u003e\u003c\/strong\u003e, \u003cstrong\u003e\u003cu\u003eour proprietary firing technique (Calcination)\u003c\/u\u003e\u003c\/strong\u003e, and \u003cstrong\u003e\u003cu\u003ethe only stone-milling technology in Japan to micro-pulverize the grains\u003c\/u\u003e\u003c\/strong\u003e, we achieve the ultimate underglaze.\u003cbr\u003e\u003cbr\u003eThrough these rigorous processes, \u003cstrong\u003e\u003cu\u003ebrushstrokes become incredibly smooth, and the Gosu is highly resistant to burning out, even at high concentrations\u003c\/u\u003e\u003c\/strong\u003e.\u003cbr\u003e\u003cstrong\u003e\u003cu\u003eYou will not need to hand-grind the pigment yourself once it arrives; it is ready to use.\u003c\/u\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003eFukaumi Shouten is the only historic Gosu manufacturer that sells its products directly online to individuals worldwide. That is why we can offer authentic, professional-grade quality directly from our factory.\u003c\/p\u003e\n\u003cdiv class=\"youtube\" style=\"margin: 30px 0;\"\u003e\u003ciframe width=\"100%\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/1myOuT9yp4s?si=J6uVaUCtCXrHTky3\" title=\"Fukaumi Shouten Gosu Manufacturing Process\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003ch2\u003e[The History of Gosu in Arita]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0yNC1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Antique Arita ware showing traditional blue underglaze\"\u003e\u003cbr\u003eThe synthetic Gosu currently used throughout Japan was developed by the Fukaumi family during the early Meiji period (late 19th century).\u003cbr\u003e\u003cbr\u003eIn 1870, the renowned German chemist Gottfried Wagener was invited to Arita.\u003cbr\u003eDr. Wagener taught Heizaemon Fukaumi and his sons, Suminosuke and Takeji, the chemical method of producing the color blue using cobalt.\u003cbr\u003e\u003cbr\u003eFollowing this, the Fukaumi family conducted extensive research and successfully developed a scientific method for producing stable Gosu.\u003cbr\u003eAs a result, vivid and reliable synthetic Gosu began to be widely used in Arita and across Japan, establishing the world-famous \"Japan Blue\".\u003cbr\u003e\u003cbr\u003ePlease experience our premium Gosu, born from centuries of history, tradition, and the power of chemistry.\u003cbr\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0zNS1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Fukaumi Shouten Gosu powder and paste\" style=\"margin-top: 15px;\"\u003e\u003c\/p\u003e\n\u003ch2\u003e[How to Use]\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Type\u003c\/strong\u003e: Suitable for both Porcelain and Stoneware\/Earthenware.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Method\u003c\/strong\u003e: Suitable for both Oxidation and Reduction firing.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOptimal Firing Temperature\u003c\/strong\u003e: 1230°C – 1300°C (2246°F – 2372°F)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e[Firing Conditions for Sample Plates]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/MjAyNDAxR09TVV9zYW1wbGVzLW1pbg.jpg?cmsp_timestamp=20240605194159\" alt=\"Gosu color sample plates fired in reduction\"\u003e\u003cbr\u003eThe color samples shown in the main product images were fired under the following conditions:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Body\u003c\/strong\u003e: Amakusa Pottery Stone (Porcelain)\u003cbr\u003e\u003cspan style=\"font-size: 0.85em; color: #666;\"\u003e(Composition: SiO2 72.04%, Al2O3 18.16%, Fe2O3 0.65%, TiO2 0.04%, CaO 0.49%, MgO 0.09%, Na2O 0.58%, K2O 3.00%, Ig.Loss 4.55%)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Temperature \u0026amp; Atmosphere\u003c\/strong\u003e: 1280°C (2336°F) \/ Reduction Firing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"color: #d32f2f; font-weight: bold; margin-top: 10px;\"\u003e*Note: The color of the underglaze will change depending on your clay body and whether you use oxidation or reduction firing. Please test in your own kiln.\u003c\/p\u003e\n\u003ch2\u003e[Frequently Asked Questions]\u003c\/h2\u003e\n\u003cdl\u003e\n\u003cdt style=\"font-weight: bold; margin-top: 15px;\"\u003eQ: How do I use the pigment?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: It arrives in a highly concentrated paste form. Please dilute it with water according to your purpose. For line drawing (outlining), a general guide is 1 part Gosu to 3 parts water. For Dami (washes), use 1 teaspoon of Gosu to 80ml-250ml of water. Please adjust to find your ideal shade.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: Should I add a binder or adhesive (like gum arabic or CMC)?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Our Gosu does not contain added binders to allow you flexibility. If the pigment is not adhering well to your bisque ware, or if your painting process requires touching the surface repeatedly, we recommend adding a small amount of your preferred binder.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: How should I store it if I won't use it for a long time?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: We recommend storing it tightly sealed in the container. If it dries out, simply add water and grind it again in a mortar to return it to a paste.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: What causes the pigment to crawl or repel during firing?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Applying the pigment too thickly is the most common cause of crawling. It can also be caused by dust or oil (from hands) on the bisque ware before painting.\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003ch2\u003e[Shipping \u0026amp; Postage (International)]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/ZGVsaXZlcnlfMWRheQ.png?cmsp_timestamp=20240605194647\" alt=\"Fast Shipping\"\u003e\u003cbr\u003eIf you place your order \u003cu\u003ebefore noon (JST)\u003c\/u\u003e, it will generally be shipped \u003cspan style=\"color: #d32f2f;\"\u003e\u003cstrong\u003e\u003cu\u003ethe next business day\u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e from our factory in Japan.\u003cbr\u003e\u003cem\u003e*If your order includes made-to-order items like specific glazes, the entire order will be shipped once all items are ready.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAbout Shipping Fees:\u003c\/strong\u003e\u003cbr\u003eShipping costs are \u003cstrong\u003eautomatically calculated at checkout\u003c\/strong\u003e based on the total weight of your order and your delivery address (Country\/Region).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAvailable Shipping Methods:\u003c\/strong\u003e\u003cbr\u003eDuring checkout, you can choose the delivery method that best suits your needs.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eEMS (Express Mail Service)\u003c\/strong\u003e: Fast and reliable with tracking, but shipping fees are higher. Typically arrives in 3 to 7 days depending on the destination.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSurface Mail (Sea Mail)\u003c\/strong\u003e: The most economical option with lower shipping fees, but delivery is slow. It typically takes 1 to 3 months to arrive.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003e*Please note that customs duties or import taxes may apply upon arrival in your country, which are the responsibility of the buyer.\u003c\/em\u003e\u003c\/p\u003e","brand":"株式会社深海商店","offers":[{"title":"Paste 100g","offer_id":49065004007715,"sku":"100140","price":2600.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0523\/0115\/files\/088___EC-min.jpg?v=1770940657"},{"product_id":"167649169","title":"Kyo Imperial 1 underglaze(100g)","description":"\u003ch2\u003e[Quality \u0026amp; Craftsmanship]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"High quality Arita blue and white porcelain\" src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/Y2FwLTE0LW1pbg.jpg?cmsp_timestamp=20240605201618\"\u003e\u003cbr\u003eFor over half a century, blue and white porcelain (Sometsuke) and Somenishiki ware created using Fukaumi Shouten's Gosu (blue underglaze) have been beloved by royalty and aristocrats worldwide, and proudly exhibited in museums.\u003cbr\u003e\u003cbr\u003e\u003cstrong style=\"color: #005bd3;\"\u003eFeatured on the BBC and Japanese National Television\u003c\/strong\u003e\u003cbr\u003eOur profound history and traditional techniques caught the attention of the world when we were featured on the prestigious UK television series, \u003cstrong\u003eBBC's \u003cem\u003e\"Great Japanese Railway Journeys\"\u003c\/em\u003e\u003c\/strong\u003e.\u003cbr\u003eIn Japan, artists utilizing our Gosu have been featured on prominent programs such as \"Wafu Souhonke\" and NHK's \"Ippin,\" which highlight the nation's finest traditional craftsmanship.\u003cbr\u003e\u003cbr\u003eOur products are also trusted for official signage at research institutions and government agencies throughout Japan. We promise to deliver this world-recognized, authentic Arita Blue directly to your studio.\u003c\/p\u003e\n\u003ch2\u003e[The Manufacturing Process]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc\/DSC01766-min.jpg?cmsp_timestamp=20221222111934\" alt=\"Gosu production process with traditional stone mill\"\u003e\u003cbr\u003eTo maintain this exceptional quality, it takes more than a month from the start of production to completion for Fukaumi Shouten's Gosu.\u003cbr\u003e\u003cbr\u003eBy combining \u003cstrong\u003e\u003cu\u003eFukaumi Shouten's unique ingredient blend\u003c\/u\u003e\u003c\/strong\u003e, \u003cstrong\u003e\u003cu\u003eour proprietary firing technique (Calcination)\u003c\/u\u003e\u003c\/strong\u003e, and \u003cstrong\u003e\u003cu\u003ethe only stone-milling technology in Japan to micro-pulverize the grains\u003c\/u\u003e\u003c\/strong\u003e, we achieve the ultimate underglaze.\u003cbr\u003e\u003cbr\u003eThrough these rigorous processes, \u003cstrong\u003e\u003cu\u003ebrushstrokes become incredibly smooth, and the Gosu is highly resistant to burning out, even at high concentrations\u003c\/u\u003e\u003c\/strong\u003e.\u003cbr\u003e\u003cstrong\u003e\u003cu\u003eYou will not need to hand-grind the pigment yourself once it arrives; it is ready to use.\u003c\/u\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003eFukaumi Shouten is the only historic Gosu manufacturer that sells its products directly online to individuals worldwide. That is why we can offer authentic, professional-grade quality directly from our factory.\u003c\/p\u003e\n\u003cdiv class=\"youtube\" style=\"margin: 30px 0;\"\u003e\u003ciframe width=\"100%\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/1myOuT9yp4s?si=J6uVaUCtCXrHTky3\" title=\"Fukaumi Shouten Gosu Manufacturing Process\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003ch2\u003e[The History of Gosu in Arita]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0yNC1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Antique Arita ware showing traditional blue underglaze\"\u003e\u003cbr\u003eThe synthetic Gosu currently used throughout Japan was developed by the Fukaumi family during the early Meiji period (late 19th century).\u003cbr\u003e\u003cbr\u003eIn 1870, the renowned German chemist Gottfried Wagener was invited to Arita.\u003cbr\u003eDr. Wagener taught Heizaemon Fukaumi and his sons, Suminosuke and Takeji, the chemical method of producing the color blue using cobalt.\u003cbr\u003e\u003cbr\u003eFollowing this, the Fukaumi family conducted extensive research and successfully developed a scientific method for producing stable Gosu.\u003cbr\u003eAs a result, vivid and reliable synthetic Gosu began to be widely used in Arita and across Japan, establishing the world-famous \"Japan Blue\".\u003cbr\u003e\u003cbr\u003ePlease experience our premium Gosu, born from centuries of history, tradition, and the power of chemistry.\u003cbr\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0zNS1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Fukaumi Shouten Gosu powder and paste\" style=\"margin-top: 15px;\"\u003e\u003c\/p\u003e\n\u003ch2\u003e[How to Use]\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Type\u003c\/strong\u003e: Suitable for both Porcelain and Stoneware\/Earthenware.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Method\u003c\/strong\u003e: Suitable for both Oxidation and Reduction firing.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOptimal Firing Temperature\u003c\/strong\u003e: 1230°C – 1300°C (2246°F – 2372°F)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e[Firing Conditions for Sample Plates]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/MjAyNDAxR09TVV9zYW1wbGVzLW1pbg.jpg?cmsp_timestamp=20240605194159\" alt=\"Gosu color sample plates fired in reduction\"\u003e\u003cbr\u003eThe color samples shown in the main product images were fired under the following conditions:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Body\u003c\/strong\u003e: Amakusa Pottery Stone (Porcelain)\u003cbr\u003e\u003cspan style=\"font-size: 0.85em; color: #666;\"\u003e(Composition: SiO2 72.04%, Al2O3 18.16%, Fe2O3 0.65%, TiO2 0.04%, CaO 0.49%, MgO 0.09%, Na2O 0.58%, K2O 3.00%, Ig.Loss 4.55%)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Temperature \u0026amp; Atmosphere\u003c\/strong\u003e: 1280°C (2336°F) \/ Reduction Firing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"color: #d32f2f; font-weight: bold; margin-top: 10px;\"\u003e*Note: The color of the underglaze will change depending on your clay body and whether you use oxidation or reduction firing. Please test in your own kiln.\u003c\/p\u003e\n\u003ch2\u003e[Frequently Asked Questions]\u003c\/h2\u003e\n\u003cdl\u003e\n\u003cdt style=\"font-weight: bold; margin-top: 15px;\"\u003eQ: How do I use the pigment?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: It arrives in a highly concentrated paste form. Please dilute it with water according to your purpose. For line drawing (outlining), a general guide is 1 part Gosu to 3 parts water. For Dami (washes), use 1 teaspoon of Gosu to 80ml-250ml of water. Please adjust to find your ideal shade.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: Should I add a binder or adhesive (like gum arabic or CMC)?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Our Gosu does not contain added binders to allow you flexibility. If the pigment is not adhering well to your bisque ware, or if your painting process requires touching the surface repeatedly, we recommend adding a small amount of your preferred binder.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: How should I store it if I won't use it for a long time?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: We recommend storing it tightly sealed in the container. If it dries out, simply add water and grind it again in a mortar to return it to a paste.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: What causes the pigment to crawl or repel during firing?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Applying the pigment too thickly is the most common cause of crawling. It can also be caused by dust or oil (from hands) on the bisque ware before painting.\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003ch2\u003e[Shipping \u0026amp; Postage (International)]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/ZGVsaXZlcnlfMWRheQ.png?cmsp_timestamp=20240605194647\" alt=\"Fast Shipping\"\u003e\u003cbr\u003eIf you place your order \u003cu\u003ebefore noon (JST)\u003c\/u\u003e, it will generally be shipped \u003cspan style=\"color: #d32f2f;\"\u003e\u003cstrong\u003e\u003cu\u003ethe next business day\u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e from our factory in Japan.\u003cbr\u003e\u003cem\u003e*If your order includes made-to-order items like specific glazes, the entire order will be shipped once all items are ready.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAbout Shipping Fees:\u003c\/strong\u003e\u003cbr\u003eShipping costs are \u003cstrong\u003eautomatically calculated at checkout\u003c\/strong\u003e based on the total weight of your order and your delivery address (Country\/Region).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAvailable Shipping Methods:\u003c\/strong\u003e\u003cbr\u003eDuring checkout, you can choose the delivery method that best suits your needs.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eEMS (Express Mail Service)\u003c\/strong\u003e: Fast and reliable with tracking, but shipping fees are higher. Typically arrives in 3 to 7 days depending on the destination.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSurface Mail (Sea Mail)\u003c\/strong\u003e: The most economical option with lower shipping fees, but delivery is slow. It typically takes 1 to 3 months to arrive.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003e*Please note that customs duties or import taxes may apply upon arrival in your country, which are the responsibility of the buyer.\u003c\/em\u003e\u003c\/p\u003e","brand":"株式会社深海商店","offers":[{"title":"Paste 100g","offer_id":49065026224419,"sku":"100310","price":2100.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0523\/0115\/files\/028___EC-min.jpg?v=1770940627"},{"product_id":"167649183","title":"Ancient 1 underglaze(100g)","description":"\u003ch2\u003e[Quality \u0026amp; Craftsmanship]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"High quality Arita blue and white porcelain\" src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/Y2FwLTE0LW1pbg.jpg?cmsp_timestamp=20240605201618\"\u003e\u003cbr\u003eFor over half a century, blue and white porcelain (Sometsuke) and Somenishiki ware created using Fukaumi Shouten's Gosu (blue underglaze) have been beloved by royalty and aristocrats worldwide, and proudly exhibited in museums.\u003cbr\u003e\u003cbr\u003e\u003cstrong style=\"color: #005bd3;\"\u003eFeatured on the BBC and Japanese National Television\u003c\/strong\u003e\u003cbr\u003eOur profound history and traditional techniques caught the attention of the world when we were featured on the prestigious UK television series, \u003cstrong\u003eBBC's \u003cem\u003e\"Great Japanese Railway Journeys\"\u003c\/em\u003e\u003c\/strong\u003e.\u003cbr\u003eIn Japan, artists utilizing our Gosu have been featured on prominent programs such as \"Wafu Souhonke\" and NHK's \"Ippin,\" which highlight the nation's finest traditional craftsmanship.\u003cbr\u003e\u003cbr\u003eOur products are also trusted for official signage at research institutions and government agencies throughout Japan. We promise to deliver this world-recognized, authentic Arita Blue directly to your studio.\u003c\/p\u003e\n\u003ch2\u003e[The Manufacturing Process]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc\/DSC01766-min.jpg?cmsp_timestamp=20221222111934\" alt=\"Gosu production process with traditional stone mill\"\u003e\u003cbr\u003eTo maintain this exceptional quality, it takes more than a month from the start of production to completion for Fukaumi Shouten's Gosu.\u003cbr\u003e\u003cbr\u003eBy combining \u003cstrong\u003e\u003cu\u003eFukaumi Shouten's unique ingredient blend\u003c\/u\u003e\u003c\/strong\u003e, \u003cstrong\u003e\u003cu\u003eour proprietary firing technique (Calcination)\u003c\/u\u003e\u003c\/strong\u003e, and \u003cstrong\u003e\u003cu\u003ethe only stone-milling technology in Japan to micro-pulverize the grains\u003c\/u\u003e\u003c\/strong\u003e, we achieve the ultimate underglaze.\u003cbr\u003e\u003cbr\u003eThrough these rigorous processes, \u003cstrong\u003e\u003cu\u003ebrushstrokes become incredibly smooth, and the Gosu is highly resistant to burning out, even at high concentrations\u003c\/u\u003e\u003c\/strong\u003e.\u003cbr\u003e\u003cstrong\u003e\u003cu\u003eYou will not need to hand-grind the pigment yourself once it arrives; it is ready to use.\u003c\/u\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003eFukaumi Shouten is the only historic Gosu manufacturer that sells its products directly online to individuals worldwide. That is why we can offer authentic, professional-grade quality directly from our factory.\u003c\/p\u003e\n\u003cdiv class=\"youtube\" style=\"margin: 30px 0;\"\u003e\u003ciframe width=\"100%\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/1myOuT9yp4s?si=J6uVaUCtCXrHTky3\" title=\"Fukaumi Shouten Gosu Manufacturing Process\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003ch2\u003e[The History of Gosu in Arita]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0yNC1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Antique Arita ware showing traditional blue underglaze\"\u003e\u003cbr\u003eThe synthetic Gosu currently used throughout Japan was developed by the Fukaumi family during the early Meiji period (late 19th century).\u003cbr\u003e\u003cbr\u003eIn 1870, the renowned German chemist Gottfried Wagener was invited to Arita.\u003cbr\u003eDr. Wagener taught Heizaemon Fukaumi and his sons, Suminosuke and Takeji, the chemical method of producing the color blue using cobalt.\u003cbr\u003e\u003cbr\u003eFollowing this, the Fukaumi family conducted extensive research and successfully developed a scientific method for producing stable Gosu.\u003cbr\u003eAs a result, vivid and reliable synthetic Gosu began to be widely used in Arita and across Japan, establishing the world-famous \"Japan Blue\".\u003cbr\u003e\u003cbr\u003ePlease experience our premium Gosu, born from centuries of history, tradition, and the power of chemistry.\u003cbr\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0zNS1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Fukaumi Shouten Gosu powder and paste\" style=\"margin-top: 15px;\"\u003e\u003c\/p\u003e\n\u003ch2\u003e[How to Use]\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Type\u003c\/strong\u003e: Suitable for both Porcelain and Stoneware\/Earthenware.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Method\u003c\/strong\u003e: Suitable for both Oxidation and Reduction firing.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOptimal Firing Temperature\u003c\/strong\u003e: 1230°C – 1300°C (2246°F – 2372°F)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e[Firing Conditions for Sample Plates]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/MjAyNDAxR09TVV9zYW1wbGVzLW1pbg.jpg?cmsp_timestamp=20240605194159\" alt=\"Gosu color sample plates fired in reduction\"\u003e\u003cbr\u003eThe color samples shown in the main product images were fired under the following conditions:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Body\u003c\/strong\u003e: Amakusa Pottery Stone (Porcelain)\u003cbr\u003e\u003cspan style=\"font-size: 0.85em; color: #666;\"\u003e(Composition: SiO2 72.04%, Al2O3 18.16%, Fe2O3 0.65%, TiO2 0.04%, CaO 0.49%, MgO 0.09%, Na2O 0.58%, K2O 3.00%, Ig.Loss 4.55%)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Temperature \u0026amp; Atmosphere\u003c\/strong\u003e: 1280°C (2336°F) \/ Reduction Firing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"color: #d32f2f; font-weight: bold; margin-top: 10px;\"\u003e*Note: The color of the underglaze will change depending on your clay body and whether you use oxidation or reduction firing. Please test in your own kiln.\u003c\/p\u003e\n\u003ch2\u003e[Frequently Asked Questions]\u003c\/h2\u003e\n\u003cdl\u003e\n\u003cdt style=\"font-weight: bold; margin-top: 15px;\"\u003eQ: How do I use the pigment?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: It arrives in a highly concentrated paste form. Please dilute it with water according to your purpose. For line drawing (outlining), a general guide is 1 part Gosu to 3 parts water. For Dami (washes), use 1 teaspoon of Gosu to 80ml-250ml of water. Please adjust to find your ideal shade.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: Should I add a binder or adhesive (like gum arabic or CMC)?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Our Gosu does not contain added binders to allow you flexibility. If the pigment is not adhering well to your bisque ware, or if your painting process requires touching the surface repeatedly, we recommend adding a small amount of your preferred binder.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: How should I store it if I won't use it for a long time?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: We recommend storing it tightly sealed in the container. If it dries out, simply add water and grind it again in a mortar to return it to a paste.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: What causes the pigment to crawl or repel during firing?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Applying the pigment too thickly is the most common cause of crawling. It can also be caused by dust or oil (from hands) on the bisque ware before painting.\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003ch2\u003e[Shipping \u0026amp; Postage (International)]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/ZGVsaXZlcnlfMWRheQ.png?cmsp_timestamp=20240605194647\" alt=\"Fast Shipping\"\u003e\u003cbr\u003eIf you place your order \u003cu\u003ebefore noon (JST)\u003c\/u\u003e, it will generally be shipped \u003cspan style=\"color: #d32f2f;\"\u003e\u003cstrong\u003e\u003cu\u003ethe next business day\u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e from our factory in Japan.\u003cbr\u003e\u003cem\u003e*If your order includes made-to-order items like specific glazes, the entire order will be shipped once all items are ready.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAbout Shipping Fees:\u003c\/strong\u003e\u003cbr\u003eShipping costs are \u003cstrong\u003eautomatically calculated at checkout\u003c\/strong\u003e based on the total weight of your order and your delivery address (Country\/Region).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAvailable Shipping Methods:\u003c\/strong\u003e\u003cbr\u003eDuring checkout, you can choose the delivery method that best suits your needs.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eEMS (Express Mail Service)\u003c\/strong\u003e: Fast and reliable with tracking, but shipping fees are higher. Typically arrives in 3 to 7 days depending on the destination.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSurface Mail (Sea Mail)\u003c\/strong\u003e: The most economical option with lower shipping fees, but delivery is slow. It typically takes 1 to 3 months to arrive.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003e*Please note that customs duties or import taxes may apply upon arrival in your country, which are the responsibility of the buyer.\u003c\/em\u003e\u003c\/p\u003e","brand":"株式会社深海商店","offers":[{"title":"Paste 100g","offer_id":49065039888675,"sku":"100010","price":2000.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0523\/0115\/files\/044___EC-min.jpg?v=1723448629"},{"product_id":"167660121","title":"Ancient 3 No.2 \/Ancient 3 No.2 underglaze(100g)","description":"\u003ch2\u003e[Quality \u0026amp; Craftsmanship]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"High quality Arita blue and white porcelain\" src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/Y2FwLTE0LW1pbg.jpg?cmsp_timestamp=20240605201618\"\u003e\u003cbr\u003eFor over half a century, blue and white porcelain (Sometsuke) and Somenishiki ware created using Fukaumi Shouten's Gosu (blue underglaze) have been beloved by royalty and aristocrats worldwide, and proudly exhibited in museums.\u003cbr\u003e\u003cbr\u003e\u003cstrong style=\"color: #005bd3;\"\u003eFeatured on the BBC and Japanese National Television\u003c\/strong\u003e\u003cbr\u003eOur profound history and traditional techniques caught the attention of the world when we were featured on the prestigious UK television series, \u003cstrong\u003eBBC's \u003cem\u003e\"Great Japanese Railway Journeys\"\u003c\/em\u003e\u003c\/strong\u003e.\u003cbr\u003eIn Japan, artists utilizing our Gosu have been featured on prominent programs such as \"Wafu Souhonke\" and NHK's \"Ippin,\" which highlight the nation's finest traditional craftsmanship.\u003cbr\u003e\u003cbr\u003eOur products are also trusted for official signage at research institutions and government agencies throughout Japan. We promise to deliver this world-recognized, authentic Arita Blue directly to your studio.\u003c\/p\u003e\n\u003ch2\u003e[The Manufacturing Process]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc\/DSC01766-min.jpg?cmsp_timestamp=20221222111934\" alt=\"Gosu production process with traditional stone mill\"\u003e\u003cbr\u003eTo maintain this exceptional quality, it takes more than a month from the start of production to completion for Fukaumi Shouten's Gosu.\u003cbr\u003e\u003cbr\u003eBy combining \u003cstrong\u003e\u003cu\u003eFukaumi Shouten's unique ingredient blend\u003c\/u\u003e\u003c\/strong\u003e, \u003cstrong\u003e\u003cu\u003eour proprietary firing technique (Calcination)\u003c\/u\u003e\u003c\/strong\u003e, and \u003cstrong\u003e\u003cu\u003ethe only stone-milling technology in Japan to micro-pulverize the grains\u003c\/u\u003e\u003c\/strong\u003e, we achieve the ultimate underglaze.\u003cbr\u003e\u003cbr\u003eThrough these rigorous processes, \u003cstrong\u003e\u003cu\u003ebrushstrokes become incredibly smooth, and the Gosu is highly resistant to burning out, even at high concentrations\u003c\/u\u003e\u003c\/strong\u003e.\u003cbr\u003e\u003cstrong\u003e\u003cu\u003eYou will not need to hand-grind the pigment yourself once it arrives; it is ready to use.\u003c\/u\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003eFukaumi Shouten is the only historic Gosu manufacturer that sells its products directly online to individuals worldwide. That is why we can offer authentic, professional-grade quality directly from our factory.\u003c\/p\u003e\n\u003cdiv class=\"youtube\" style=\"margin: 30px 0;\"\u003e\u003ciframe width=\"100%\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/1myOuT9yp4s?si=J6uVaUCtCXrHTky3\" title=\"Fukaumi Shouten Gosu Manufacturing Process\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003ch2\u003e[The History of Gosu in Arita]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0yNC1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Antique Arita ware showing traditional blue underglaze\"\u003e\u003cbr\u003eThe synthetic Gosu currently used throughout Japan was developed by the Fukaumi family during the early Meiji period (late 19th century).\u003cbr\u003e\u003cbr\u003eIn 1870, the renowned German chemist Gottfried Wagener was invited to Arita.\u003cbr\u003eDr. Wagener taught Heizaemon Fukaumi and his sons, Suminosuke and Takeji, the chemical method of producing the color blue using cobalt.\u003cbr\u003e\u003cbr\u003eFollowing this, the Fukaumi family conducted extensive research and successfully developed a scientific method for producing stable Gosu.\u003cbr\u003eAs a result, vivid and reliable synthetic Gosu began to be widely used in Arita and across Japan, establishing the world-famous \"Japan Blue\".\u003cbr\u003e\u003cbr\u003ePlease experience our premium Gosu, born from centuries of history, tradition, and the power of chemistry.\u003cbr\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0zNS1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Fukaumi Shouten Gosu powder and paste\" style=\"margin-top: 15px;\"\u003e\u003c\/p\u003e\n\u003ch2\u003e[How to Use]\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Type\u003c\/strong\u003e: Suitable for both Porcelain and Stoneware\/Earthenware.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Method\u003c\/strong\u003e: Suitable for both Oxidation and Reduction firing.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOptimal Firing Temperature\u003c\/strong\u003e: 1230°C – 1300°C (2246°F – 2372°F)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e[Firing Conditions for Sample Plates]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/MjAyNDAxR09TVV9zYW1wbGVzLW1pbg.jpg?cmsp_timestamp=20240605194159\" alt=\"Gosu color sample plates fired in reduction\"\u003e\u003cbr\u003eThe color samples shown in the main product images were fired under the following conditions:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Body\u003c\/strong\u003e: Amakusa Pottery Stone (Porcelain)\u003cbr\u003e\u003cspan style=\"font-size: 0.85em; color: #666;\"\u003e(Composition: SiO2 72.04%, Al2O3 18.16%, Fe2O3 0.65%, TiO2 0.04%, CaO 0.49%, MgO 0.09%, Na2O 0.58%, K2O 3.00%, Ig.Loss 4.55%)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Temperature \u0026amp; Atmosphere\u003c\/strong\u003e: 1280°C (2336°F) \/ Reduction Firing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"color: #d32f2f; font-weight: bold; margin-top: 10px;\"\u003e*Note: The color of the underglaze will change depending on your clay body and whether you use oxidation or reduction firing. Please test in your own kiln.\u003c\/p\u003e\n\u003ch2\u003e[Frequently Asked Questions]\u003c\/h2\u003e\n\u003cdl\u003e\n\u003cdt style=\"font-weight: bold; margin-top: 15px;\"\u003eQ: How do I use the pigment?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: It arrives in a highly concentrated paste form. Please dilute it with water according to your purpose. For line drawing (outlining), a general guide is 1 part Gosu to 3 parts water. For Dami (washes), use 1 teaspoon of Gosu to 80ml-250ml of water. Please adjust to find your ideal shade.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: Should I add a binder or adhesive (like gum arabic or CMC)?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Our Gosu does not contain added binders to allow you flexibility. If the pigment is not adhering well to your bisque ware, or if your painting process requires touching the surface repeatedly, we recommend adding a small amount of your preferred binder.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: How should I store it if I won't use it for a long time?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: We recommend storing it tightly sealed in the container. If it dries out, simply add water and grind it again in a mortar to return it to a paste.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: What causes the pigment to crawl or repel during firing?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Applying the pigment too thickly is the most common cause of crawling. It can also be caused by dust or oil (from hands) on the bisque ware before painting.\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003ch2\u003e[Shipping \u0026amp; Postage (International)]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/ZGVsaXZlcnlfMWRheQ.png?cmsp_timestamp=20240605194647\" alt=\"Fast Shipping\"\u003e\u003cbr\u003eIf you place your order \u003cu\u003ebefore noon (JST)\u003c\/u\u003e, it will generally be shipped \u003cspan style=\"color: #d32f2f;\"\u003e\u003cstrong\u003e\u003cu\u003ethe next business day\u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e from our factory in Japan.\u003cbr\u003e\u003cem\u003e*If your order includes made-to-order items like specific glazes, the entire order will be shipped once all items are ready.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAbout Shipping Fees:\u003c\/strong\u003e\u003cbr\u003eShipping costs are \u003cstrong\u003eautomatically calculated at checkout\u003c\/strong\u003e based on the total weight of your order and your delivery address (Country\/Region).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAvailable Shipping Methods:\u003c\/strong\u003e\u003cbr\u003eDuring checkout, you can choose the delivery method that best suits your needs.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eEMS (Express Mail Service)\u003c\/strong\u003e: Fast and reliable with tracking, but shipping fees are higher. Typically arrives in 3 to 7 days depending on the destination.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSurface Mail (Sea Mail)\u003c\/strong\u003e: The most economical option with lower shipping fees, but delivery is slow. It typically takes 1 to 3 months to arrive.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003e*Please note that customs duties or import taxes may apply upon arrival in your country, which are the responsibility of the buyer.\u003c\/em\u003e\u003c\/p\u003e","brand":"株式会社深海商店","offers":[{"title":"Paste 100g","offer_id":49065052143907,"sku":"100030","price":2100.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0523\/0115\/files\/025__No2_EC-min.jpg?v=1723448673"},{"product_id":"167660287","title":"Ancient 3 No.4 \/Ancient 3 No.4 underglaze(100g)","description":"\u003ch2\u003e[Quality \u0026amp; Craftsmanship]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"High quality Arita blue and white porcelain\" src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/Y2FwLTE0LW1pbg.jpg?cmsp_timestamp=20240605201618\"\u003e\u003cbr\u003eFor over half a century, blue and white porcelain (Sometsuke) and Somenishiki ware created using Fukaumi Shouten's Gosu (blue underglaze) have been beloved by royalty and aristocrats worldwide, and proudly exhibited in museums.\u003cbr\u003e\u003cbr\u003e\u003cstrong style=\"color: #005bd3;\"\u003eFeatured on the BBC and Japanese National Television\u003c\/strong\u003e\u003cbr\u003eOur profound history and traditional techniques caught the attention of the world when we were featured on the prestigious UK television series, \u003cstrong\u003eBBC's \u003cem\u003e\"Great Japanese Railway Journeys\"\u003c\/em\u003e\u003c\/strong\u003e.\u003cbr\u003eIn Japan, artists utilizing our Gosu have been featured on prominent programs such as \"Wafu Souhonke\" and NHK's \"Ippin,\" which highlight the nation's finest traditional craftsmanship.\u003cbr\u003e\u003cbr\u003eOur products are also trusted for official signage at research institutions and government agencies throughout Japan. We promise to deliver this world-recognized, authentic Arita Blue directly to your studio.\u003c\/p\u003e\n\u003ch2\u003e[The Manufacturing Process]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc\/DSC01766-min.jpg?cmsp_timestamp=20221222111934\" alt=\"Gosu production process with traditional stone mill\"\u003e\u003cbr\u003eTo maintain this exceptional quality, it takes more than a month from the start of production to completion for Fukaumi Shouten's Gosu.\u003cbr\u003e\u003cbr\u003eBy combining \u003cstrong\u003e\u003cu\u003eFukaumi Shouten's unique ingredient blend\u003c\/u\u003e\u003c\/strong\u003e, \u003cstrong\u003e\u003cu\u003eour proprietary firing technique (Calcination)\u003c\/u\u003e\u003c\/strong\u003e, and \u003cstrong\u003e\u003cu\u003ethe only stone-milling technology in Japan to micro-pulverize the grains\u003c\/u\u003e\u003c\/strong\u003e, we achieve the ultimate underglaze.\u003cbr\u003e\u003cbr\u003eThrough these rigorous processes, \u003cstrong\u003e\u003cu\u003ebrushstrokes become incredibly smooth, and the Gosu is highly resistant to burning out, even at high concentrations\u003c\/u\u003e\u003c\/strong\u003e.\u003cbr\u003e\u003cstrong\u003e\u003cu\u003eYou will not need to hand-grind the pigment yourself once it arrives; it is ready to use.\u003c\/u\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003eFukaumi Shouten is the only historic Gosu manufacturer that sells its products directly online to individuals worldwide. That is why we can offer authentic, professional-grade quality directly from our factory.\u003c\/p\u003e\n\u003cdiv class=\"youtube\" style=\"margin: 30px 0;\"\u003e\u003ciframe width=\"100%\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/1myOuT9yp4s?si=J6uVaUCtCXrHTky3\" title=\"Fukaumi Shouten Gosu Manufacturing Process\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003ch2\u003e[The History of Gosu in Arita]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0yNC1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Antique Arita ware showing traditional blue underglaze\"\u003e\u003cbr\u003eThe synthetic Gosu currently used throughout Japan was developed by the Fukaumi family during the early Meiji period (late 19th century).\u003cbr\u003e\u003cbr\u003eIn 1870, the renowned German chemist Gottfried Wagener was invited to Arita.\u003cbr\u003eDr. Wagener taught Heizaemon Fukaumi and his sons, Suminosuke and Takeji, the chemical method of producing the color blue using cobalt.\u003cbr\u003e\u003cbr\u003eFollowing this, the Fukaumi family conducted extensive research and successfully developed a scientific method for producing stable Gosu.\u003cbr\u003eAs a result, vivid and reliable synthetic Gosu began to be widely used in Arita and across Japan, establishing the world-famous \"Japan Blue\".\u003cbr\u003e\u003cbr\u003ePlease experience our premium Gosu, born from centuries of history, tradition, and the power of chemistry.\u003cbr\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0zNS1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Fukaumi Shouten Gosu powder and paste\" style=\"margin-top: 15px;\"\u003e\u003c\/p\u003e\n\u003ch2\u003e[How to Use]\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Type\u003c\/strong\u003e: Suitable for both Porcelain and Stoneware\/Earthenware.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Method\u003c\/strong\u003e: Suitable for both Oxidation and Reduction firing.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOptimal Firing Temperature\u003c\/strong\u003e: 1230°C – 1300°C (2246°F – 2372°F)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e[Firing Conditions for Sample Plates]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/MjAyNDAxR09TVV9zYW1wbGVzLW1pbg.jpg?cmsp_timestamp=20240605194159\" alt=\"Gosu color sample plates fired in reduction\"\u003e\u003cbr\u003eThe color samples shown in the main product images were fired under the following conditions:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Body\u003c\/strong\u003e: Amakusa Pottery Stone (Porcelain)\u003cbr\u003e\u003cspan style=\"font-size: 0.85em; color: #666;\"\u003e(Composition: SiO2 72.04%, Al2O3 18.16%, Fe2O3 0.65%, TiO2 0.04%, CaO 0.49%, MgO 0.09%, Na2O 0.58%, K2O 3.00%, Ig.Loss 4.55%)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Temperature \u0026amp; Atmosphere\u003c\/strong\u003e: 1280°C (2336°F) \/ Reduction Firing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"color: #d32f2f; font-weight: bold; margin-top: 10px;\"\u003e*Note: The color of the underglaze will change depending on your clay body and whether you use oxidation or reduction firing. Please test in your own kiln.\u003c\/p\u003e\n\u003ch2\u003e[Frequently Asked Questions]\u003c\/h2\u003e\n\u003cdl\u003e\n\u003cdt style=\"font-weight: bold; margin-top: 15px;\"\u003eQ: How do I use the pigment?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: It arrives in a highly concentrated paste form. Please dilute it with water according to your purpose. For line drawing (outlining), a general guide is 1 part Gosu to 3 parts water. For Dami (washes), use 1 teaspoon of Gosu to 80ml-250ml of water. Please adjust to find your ideal shade.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: Should I add a binder or adhesive (like gum arabic or CMC)?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Our Gosu does not contain added binders to allow you flexibility. If the pigment is not adhering well to your bisque ware, or if your painting process requires touching the surface repeatedly, we recommend adding a small amount of your preferred binder.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: How should I store it if I won't use it for a long time?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: We recommend storing it tightly sealed in the container. If it dries out, simply add water and grind it again in a mortar to return it to a paste.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: What causes the pigment to crawl or repel during firing?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Applying the pigment too thickly is the most common cause of crawling. It can also be caused by dust or oil (from hands) on the bisque ware before painting.\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003ch2\u003e[Shipping \u0026amp; Postage (International)]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/ZGVsaXZlcnlfMWRheQ.png?cmsp_timestamp=20240605194647\" alt=\"Fast Shipping\"\u003e\u003cbr\u003eIf you place your order \u003cu\u003ebefore noon (JST)\u003c\/u\u003e, it will generally be shipped \u003cspan style=\"color: #d32f2f;\"\u003e\u003cstrong\u003e\u003cu\u003ethe next business day\u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e from our factory in Japan.\u003cbr\u003e\u003cem\u003e*If your order includes made-to-order items like specific glazes, the entire order will be shipped once all items are ready.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAbout Shipping Fees:\u003c\/strong\u003e\u003cbr\u003eShipping costs are \u003cstrong\u003eautomatically calculated at checkout\u003c\/strong\u003e based on the total weight of your order and your delivery address (Country\/Region).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAvailable Shipping Methods:\u003c\/strong\u003e\u003cbr\u003eDuring checkout, you can choose the delivery method that best suits your needs.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eEMS (Express Mail Service)\u003c\/strong\u003e: Fast and reliable with tracking, but shipping fees are higher. Typically arrives in 3 to 7 days depending on the destination.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSurface Mail (Sea Mail)\u003c\/strong\u003e: The most economical option with lower shipping fees, but delivery is slow. It typically takes 1 to 3 months to arrive.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003e*Please note that customs duties or import taxes may apply upon arrival in your country, which are the responsibility of the buyer.\u003c\/em\u003e\u003c\/p\u003e","brand":"株式会社深海商店","offers":[{"title":"Paste 100g","offer_id":49065065283875,"sku":"100560","price":2100.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0523\/0115\/files\/023__No4_EC-min.jpg?v=1723448715"},{"product_id":"167660304","title":"Rust Ancient Gosu underglaze(100g)","description":"\u003ch2\u003e[Quality \u0026amp; Craftsmanship]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"High quality Arita blue and white porcelain\" src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/Y2FwLTE0LW1pbg.jpg?cmsp_timestamp=20240605201618\"\u003e\u003cbr\u003eFor over half a century, blue and white porcelain (Sometsuke) and Somenishiki ware created using Fukaumi Shouten's Gosu (blue underglaze) have been beloved by royalty and aristocrats worldwide, and proudly exhibited in museums.\u003cbr\u003e\u003cbr\u003e\u003cstrong style=\"color: #005bd3;\"\u003eFeatured on the BBC and Japanese National Television\u003c\/strong\u003e\u003cbr\u003eOur profound history and traditional techniques caught the attention of the world when we were featured on the prestigious UK television series, \u003cstrong\u003eBBC's \u003cem\u003e\"Great Japanese Railway Journeys\"\u003c\/em\u003e\u003c\/strong\u003e.\u003cbr\u003eIn Japan, artists utilizing our Gosu have been featured on prominent programs such as \"Wafu Souhonke\" and NHK's \"Ippin,\" which highlight the nation's finest traditional craftsmanship.\u003cbr\u003e\u003cbr\u003eOur products are also trusted for official signage at research institutions and government agencies throughout Japan. We promise to deliver this world-recognized, authentic Arita Blue directly to your studio.\u003c\/p\u003e\n\u003ch2\u003e[The Manufacturing Process]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc\/DSC01766-min.jpg?cmsp_timestamp=20221222111934\" alt=\"Gosu production process with traditional stone mill\"\u003e\u003cbr\u003eTo maintain this exceptional quality, it takes more than a month from the start of production to completion for Fukaumi Shouten's Gosu.\u003cbr\u003e\u003cbr\u003eBy combining \u003cstrong\u003e\u003cu\u003eFukaumi Shouten's unique ingredient blend\u003c\/u\u003e\u003c\/strong\u003e, \u003cstrong\u003e\u003cu\u003eour proprietary firing technique (Calcination)\u003c\/u\u003e\u003c\/strong\u003e, and \u003cstrong\u003e\u003cu\u003ethe only stone-milling technology in Japan to micro-pulverize the grains\u003c\/u\u003e\u003c\/strong\u003e, we achieve the ultimate underglaze.\u003cbr\u003e\u003cbr\u003eThrough these rigorous processes, \u003cstrong\u003e\u003cu\u003ebrushstrokes become incredibly smooth, and the Gosu is highly resistant to burning out, even at high concentrations\u003c\/u\u003e\u003c\/strong\u003e.\u003cbr\u003e\u003cstrong\u003e\u003cu\u003eYou will not need to hand-grind the pigment yourself once it arrives; it is ready to use.\u003c\/u\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003eFukaumi Shouten is the only historic Gosu manufacturer that sells its products directly online to individuals worldwide. That is why we can offer authentic, professional-grade quality directly from our factory.\u003c\/p\u003e\n\u003cdiv class=\"youtube\" style=\"margin: 30px 0;\"\u003e\u003ciframe width=\"100%\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/1myOuT9yp4s?si=J6uVaUCtCXrHTky3\" title=\"Fukaumi Shouten Gosu Manufacturing Process\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003ch2\u003e[The History of Gosu in Arita]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0yNC1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Antique Arita ware showing traditional blue underglaze\"\u003e\u003cbr\u003eThe synthetic Gosu currently used throughout Japan was developed by the Fukaumi family during the early Meiji period (late 19th century).\u003cbr\u003e\u003cbr\u003eIn 1870, the renowned German chemist Gottfried Wagener was invited to Arita.\u003cbr\u003eDr. Wagener taught Heizaemon Fukaumi and his sons, Suminosuke and Takeji, the chemical method of producing the color blue using cobalt.\u003cbr\u003e\u003cbr\u003eFollowing this, the Fukaumi family conducted extensive research and successfully developed a scientific method for producing stable Gosu.\u003cbr\u003eAs a result, vivid and reliable synthetic Gosu began to be widely used in Arita and across Japan, establishing the world-famous \"Japan Blue\".\u003cbr\u003e\u003cbr\u003ePlease experience our premium Gosu, born from centuries of history, tradition, and the power of chemistry.\u003cbr\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0zNS1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Fukaumi Shouten Gosu powder and paste\" style=\"margin-top: 15px;\"\u003e\u003c\/p\u003e\n\u003ch2\u003e[How to Use]\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Type\u003c\/strong\u003e: Suitable for both Porcelain and Stoneware\/Earthenware.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Method\u003c\/strong\u003e: Suitable for both Oxidation and Reduction firing.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOptimal Firing Temperature\u003c\/strong\u003e: 1230°C – 1300°C (2246°F – 2372°F)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e[Firing Conditions for Sample Plates]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/MjAyNDAxR09TVV9zYW1wbGVzLW1pbg.jpg?cmsp_timestamp=20240605194159\" alt=\"Gosu color sample plates fired in reduction\"\u003e\u003cbr\u003eThe color samples shown in the main product images were fired under the following conditions:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Body\u003c\/strong\u003e: Amakusa Pottery Stone (Porcelain)\u003cbr\u003e\u003cspan style=\"font-size: 0.85em; color: #666;\"\u003e(Composition: SiO2 72.04%, Al2O3 18.16%, Fe2O3 0.65%, TiO2 0.04%, CaO 0.49%, MgO 0.09%, Na2O 0.58%, K2O 3.00%, Ig.Loss 4.55%)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Temperature \u0026amp; Atmosphere\u003c\/strong\u003e: 1280°C (2336°F) \/ Reduction Firing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"color: #d32f2f; font-weight: bold; margin-top: 10px;\"\u003e*Note: The color of the underglaze will change depending on your clay body and whether you use oxidation or reduction firing. Please test in your own kiln.\u003c\/p\u003e\n\u003ch2\u003e[Frequently Asked Questions]\u003c\/h2\u003e\n\u003cdl\u003e\n\u003cdt style=\"font-weight: bold; margin-top: 15px;\"\u003eQ: How do I use the pigment?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: It arrives in a highly concentrated paste form. Please dilute it with water according to your purpose. For line drawing (outlining), a general guide is 1 part Gosu to 3 parts water. For Dami (washes), use 1 teaspoon of Gosu to 80ml-250ml of water. Please adjust to find your ideal shade.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: Should I add a binder or adhesive (like gum arabic or CMC)?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Our Gosu does not contain added binders to allow you flexibility. If the pigment is not adhering well to your bisque ware, or if your painting process requires touching the surface repeatedly, we recommend adding a small amount of your preferred binder.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: How should I store it if I won't use it for a long time?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: We recommend storing it tightly sealed in the container. If it dries out, simply add water and grind it again in a mortar to return it to a paste.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: What causes the pigment to crawl or repel during firing?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Applying the pigment too thickly is the most common cause of crawling. It can also be caused by dust or oil (from hands) on the bisque ware before painting.\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003ch2\u003e[Shipping \u0026amp; Postage (International)]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/ZGVsaXZlcnlfMWRheQ.png?cmsp_timestamp=20240605194647\" alt=\"Fast Shipping\"\u003e\u003cbr\u003eIf you place your order \u003cu\u003ebefore noon (JST)\u003c\/u\u003e, it will generally be shipped \u003cspan style=\"color: #d32f2f;\"\u003e\u003cstrong\u003e\u003cu\u003ethe next business day\u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e from our factory in Japan.\u003cbr\u003e\u003cem\u003e*If your order includes made-to-order items like specific glazes, the entire order will be shipped once all items are ready.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAbout Shipping Fees:\u003c\/strong\u003e\u003cbr\u003eShipping costs are \u003cstrong\u003eautomatically calculated at checkout\u003c\/strong\u003e based on the total weight of your order and your delivery address (Country\/Region).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAvailable Shipping Methods:\u003c\/strong\u003e\u003cbr\u003eDuring checkout, you can choose the delivery method that best suits your needs.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eEMS (Express Mail Service)\u003c\/strong\u003e: Fast and reliable with tracking, but shipping fees are higher. Typically arrives in 3 to 7 days depending on the destination.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSurface Mail (Sea Mail)\u003c\/strong\u003e: The most economical option with lower shipping fees, but delivery is slow. It typically takes 1 to 3 months to arrive.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003e*Please note that customs duties or import taxes may apply upon arrival in your country, which are the responsibility of the buyer.\u003c\/em\u003e\u003c\/p\u003e","brand":"株式会社深海商店","offers":[{"title":"Paste 100g","offer_id":49065358983459,"sku":"100420","price":2100.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0523\/0115\/files\/065___EC-min.jpg?v=1723453081"},{"product_id":"167660328","title":"Rust Gosu No.1 \/Rust Gosu underglaze(100g)","description":"\u003ch2\u003e[Quality \u0026amp; Craftsmanship]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"High quality Arita blue and white porcelain\" src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/Y2FwLTE0LW1pbg.jpg?cmsp_timestamp=20240605201618\"\u003e\u003cbr\u003eFor over half a century, blue and white porcelain (Sometsuke) and Somenishiki ware created using Fukaumi Shouten's Gosu (blue underglaze) have been beloved by royalty and aristocrats worldwide, and proudly exhibited in museums.\u003cbr\u003e\u003cbr\u003e\u003cstrong style=\"color: #005bd3;\"\u003eFeatured on the BBC and Japanese National Television\u003c\/strong\u003e\u003cbr\u003eOur profound history and traditional techniques caught the attention of the world when we were featured on the prestigious UK television series, \u003cstrong\u003eBBC's \u003cem\u003e\"Great Japanese Railway Journeys\"\u003c\/em\u003e\u003c\/strong\u003e.\u003cbr\u003eIn Japan, artists utilizing our Gosu have been featured on prominent programs such as \"Wafu Souhonke\" and NHK's \"Ippin,\" which highlight the nation's finest traditional craftsmanship.\u003cbr\u003e\u003cbr\u003eOur products are also trusted for official signage at research institutions and government agencies throughout Japan. We promise to deliver this world-recognized, authentic Arita Blue directly to your studio.\u003c\/p\u003e\n\u003ch2\u003e[The Manufacturing Process]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc\/DSC01766-min.jpg?cmsp_timestamp=20221222111934\" alt=\"Gosu production process with traditional stone mill\"\u003e\u003cbr\u003eTo maintain this exceptional quality, it takes more than a month from the start of production to completion for Fukaumi Shouten's Gosu.\u003cbr\u003e\u003cbr\u003eBy combining \u003cstrong\u003e\u003cu\u003eFukaumi Shouten's unique ingredient blend\u003c\/u\u003e\u003c\/strong\u003e, \u003cstrong\u003e\u003cu\u003eour proprietary firing technique (Calcination)\u003c\/u\u003e\u003c\/strong\u003e, and \u003cstrong\u003e\u003cu\u003ethe only stone-milling technology in Japan to micro-pulverize the grains\u003c\/u\u003e\u003c\/strong\u003e, we achieve the ultimate underglaze.\u003cbr\u003e\u003cbr\u003eThrough these rigorous processes, \u003cstrong\u003e\u003cu\u003ebrushstrokes become incredibly smooth, and the Gosu is highly resistant to burning out, even at high concentrations\u003c\/u\u003e\u003c\/strong\u003e.\u003cbr\u003e\u003cstrong\u003e\u003cu\u003eYou will not need to hand-grind the pigment yourself once it arrives; it is ready to use.\u003c\/u\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003eFukaumi Shouten is the only historic Gosu manufacturer that sells its products directly online to individuals worldwide. That is why we can offer authentic, professional-grade quality directly from our factory.\u003c\/p\u003e\n\u003cdiv class=\"youtube\" style=\"margin: 30px 0;\"\u003e\u003ciframe width=\"100%\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/1myOuT9yp4s?si=J6uVaUCtCXrHTky3\" title=\"Fukaumi Shouten Gosu Manufacturing Process\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003ch2\u003e[The History of Gosu in Arita]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0yNC1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Antique Arita ware showing traditional blue underglaze\"\u003e\u003cbr\u003eThe synthetic Gosu currently used throughout Japan was developed by the Fukaumi family during the early Meiji period (late 19th century).\u003cbr\u003e\u003cbr\u003eIn 1870, the renowned German chemist Gottfried Wagener was invited to Arita.\u003cbr\u003eDr. Wagener taught Heizaemon Fukaumi and his sons, Suminosuke and Takeji, the chemical method of producing the color blue using cobalt.\u003cbr\u003e\u003cbr\u003eFollowing this, the Fukaumi family conducted extensive research and successfully developed a scientific method for producing stable Gosu.\u003cbr\u003eAs a result, vivid and reliable synthetic Gosu began to be widely used in Arita and across Japan, establishing the world-famous \"Japan Blue\".\u003cbr\u003e\u003cbr\u003ePlease experience our premium Gosu, born from centuries of history, tradition, and the power of chemistry.\u003cbr\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0zNS1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Fukaumi Shouten Gosu powder and paste\" style=\"margin-top: 15px;\"\u003e\u003c\/p\u003e\n\u003ch2\u003e[How to Use]\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Type\u003c\/strong\u003e: Suitable for both Porcelain and Stoneware\/Earthenware.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Method\u003c\/strong\u003e: Suitable for both Oxidation and Reduction firing.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOptimal Firing Temperature\u003c\/strong\u003e: 1230°C – 1300°C (2246°F – 2372°F)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e[Firing Conditions for Sample Plates]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/MjAyNDAxR09TVV9zYW1wbGVzLW1pbg.jpg?cmsp_timestamp=20240605194159\" alt=\"Gosu color sample plates fired in reduction\"\u003e\u003cbr\u003eThe color samples shown in the main product images were fired under the following conditions:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Body\u003c\/strong\u003e: Amakusa Pottery Stone (Porcelain)\u003cbr\u003e\u003cspan style=\"font-size: 0.85em; color: #666;\"\u003e(Composition: SiO2 72.04%, Al2O3 18.16%, Fe2O3 0.65%, TiO2 0.04%, CaO 0.49%, MgO 0.09%, Na2O 0.58%, K2O 3.00%, Ig.Loss 4.55%)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Temperature \u0026amp; Atmosphere\u003c\/strong\u003e: 1280°C (2336°F) \/ Reduction Firing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"color: #d32f2f; font-weight: bold; margin-top: 10px;\"\u003e*Note: The color of the underglaze will change depending on your clay body and whether you use oxidation or reduction firing. Please test in your own kiln.\u003c\/p\u003e\n\u003ch2\u003e[Frequently Asked Questions]\u003c\/h2\u003e\n\u003cdl\u003e\n\u003cdt style=\"font-weight: bold; margin-top: 15px;\"\u003eQ: How do I use the pigment?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: It arrives in a highly concentrated paste form. Please dilute it with water according to your purpose. For line drawing (outlining), a general guide is 1 part Gosu to 3 parts water. For Dami (washes), use 1 teaspoon of Gosu to 80ml-250ml of water. Please adjust to find your ideal shade.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: Should I add a binder or adhesive (like gum arabic or CMC)?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Our Gosu does not contain added binders to allow you flexibility. If the pigment is not adhering well to your bisque ware, or if your painting process requires touching the surface repeatedly, we recommend adding a small amount of your preferred binder.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: How should I store it if I won't use it for a long time?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: We recommend storing it tightly sealed in the container. If it dries out, simply add water and grind it again in a mortar to return it to a paste.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: What causes the pigment to crawl or repel during firing?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Applying the pigment too thickly is the most common cause of crawling. It can also be caused by dust or oil (from hands) on the bisque ware before painting.\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003ch2\u003e[Shipping \u0026amp; Postage (International)]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/ZGVsaXZlcnlfMWRheQ.png?cmsp_timestamp=20240605194647\" alt=\"Fast Shipping\"\u003e\u003cbr\u003eIf you place your order \u003cu\u003ebefore noon (JST)\u003c\/u\u003e, it will generally be shipped \u003cspan style=\"color: #d32f2f;\"\u003e\u003cstrong\u003e\u003cu\u003ethe next business day\u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e from our factory in Japan.\u003cbr\u003e\u003cem\u003e*If your order includes made-to-order items like specific glazes, the entire order will be shipped once all items are ready.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAbout Shipping Fees:\u003c\/strong\u003e\u003cbr\u003eShipping costs are \u003cstrong\u003eautomatically calculated at checkout\u003c\/strong\u003e based on the total weight of your order and your delivery address (Country\/Region).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAvailable Shipping Methods:\u003c\/strong\u003e\u003cbr\u003eDuring checkout, you can choose the delivery method that best suits your needs.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eEMS (Express Mail Service)\u003c\/strong\u003e: Fast and reliable with tracking, but shipping fees are higher. Typically arrives in 3 to 7 days depending on the destination.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSurface Mail (Sea Mail)\u003c\/strong\u003e: The most economical option with lower shipping fees, but delivery is slow. It typically takes 1 to 3 months to arrive.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003e*Please note that customs duties or import taxes may apply upon arrival in your country, which are the responsibility of the buyer.\u003c\/em\u003e\u003c\/p\u003e","brand":"株式会社深海商店","offers":[{"title":"Paste 100g","offer_id":49065363603747,"sku":"100430","price":1800.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0523\/0115\/files\/069___EC-min_284e390c-339b-44ac-bf8b-125ef4608eeb.jpg?v=1723453500"},{"product_id":"167660334","title":"Black 3 No.2 underglaze (100g)","description":"\u003ch2\u003e[Quality \u0026amp; Craftsmanship]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"High quality Arita blue and white porcelain\" src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/Y2FwLTE0LW1pbg.jpg?cmsp_timestamp=20240605201618\"\u003e\u003cbr\u003eFor over half a century, blue and white porcelain (Sometsuke) and Somenishiki ware created using Fukaumi Shouten's Gosu (blue underglaze) have been beloved by royalty and aristocrats worldwide, and proudly exhibited in museums.\u003cbr\u003e\u003cbr\u003e\u003cstrong style=\"color: #005bd3;\"\u003eFeatured on the BBC and Japanese National Television\u003c\/strong\u003e\u003cbr\u003eOur profound history and traditional techniques caught the attention of the world when we were featured on the prestigious UK television series, \u003cstrong\u003eBBC's \u003cem\u003e\"Great Japanese Railway Journeys\"\u003c\/em\u003e\u003c\/strong\u003e.\u003cbr\u003eIn Japan, artists utilizing our Gosu have been featured on prominent programs such as \"Wafu Souhonke\" and NHK's \"Ippin,\" which highlight the nation's finest traditional craftsmanship.\u003cbr\u003e\u003cbr\u003eOur products are also trusted for official signage at research institutions and government agencies throughout Japan. We promise to deliver this world-recognized, authentic Arita Blue directly to your studio.\u003c\/p\u003e\n\u003ch2\u003e[The Manufacturing Process]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc\/DSC01766-min.jpg?cmsp_timestamp=20221222111934\" alt=\"Gosu production process with traditional stone mill\"\u003e\u003cbr\u003eTo maintain this exceptional quality, it takes more than a month from the start of production to completion for Fukaumi Shouten's Gosu.\u003cbr\u003e\u003cbr\u003eBy combining \u003cstrong\u003e\u003cu\u003eFukaumi Shouten's unique ingredient blend\u003c\/u\u003e\u003c\/strong\u003e, \u003cstrong\u003e\u003cu\u003eour proprietary firing technique (Calcination)\u003c\/u\u003e\u003c\/strong\u003e, and \u003cstrong\u003e\u003cu\u003ethe only stone-milling technology in Japan to micro-pulverize the grains\u003c\/u\u003e\u003c\/strong\u003e, we achieve the ultimate underglaze.\u003cbr\u003e\u003cbr\u003eThrough these rigorous processes, \u003cstrong\u003e\u003cu\u003ebrushstrokes become incredibly smooth, and the Gosu is highly resistant to burning out, even at high concentrations\u003c\/u\u003e\u003c\/strong\u003e.\u003cbr\u003e\u003cstrong\u003e\u003cu\u003eYou will not need to hand-grind the pigment yourself once it arrives; it is ready to use.\u003c\/u\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003eFukaumi Shouten is the only historic Gosu manufacturer that sells its products directly online to individuals worldwide. That is why we can offer authentic, professional-grade quality directly from our factory.\u003c\/p\u003e\n\u003cdiv class=\"youtube\" style=\"margin: 30px 0;\"\u003e\u003ciframe width=\"100%\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/1myOuT9yp4s?si=J6uVaUCtCXrHTky3\" title=\"Fukaumi Shouten Gosu Manufacturing Process\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003ch2\u003e[The History of Gosu in Arita]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0yNC1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Antique Arita ware showing traditional blue underglaze\"\u003e\u003cbr\u003eThe synthetic Gosu currently used throughout Japan was developed by the Fukaumi family during the early Meiji period (late 19th century).\u003cbr\u003e\u003cbr\u003eIn 1870, the renowned German chemist Gottfried Wagener was invited to Arita.\u003cbr\u003eDr. Wagener taught Heizaemon Fukaumi and his sons, Suminosuke and Takeji, the chemical method of producing the color blue using cobalt.\u003cbr\u003e\u003cbr\u003eFollowing this, the Fukaumi family conducted extensive research and successfully developed a scientific method for producing stable Gosu.\u003cbr\u003eAs a result, vivid and reliable synthetic Gosu began to be widely used in Arita and across Japan, establishing the world-famous \"Japan Blue\".\u003cbr\u003e\u003cbr\u003ePlease experience our premium Gosu, born from centuries of history, tradition, and the power of chemistry.\u003cbr\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0zNS1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Fukaumi Shouten Gosu powder and paste\" style=\"margin-top: 15px;\"\u003e\u003c\/p\u003e\n\u003ch2\u003e[How to Use]\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Type\u003c\/strong\u003e: Suitable for both Porcelain and Stoneware\/Earthenware.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Method\u003c\/strong\u003e: Suitable for both Oxidation and Reduction firing.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOptimal Firing Temperature\u003c\/strong\u003e: 1230°C – 1300°C (2246°F – 2372°F)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e[Firing Conditions for Sample Plates]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/MjAyNDAxR09TVV9zYW1wbGVzLW1pbg.jpg?cmsp_timestamp=20240605194159\" alt=\"Gosu color sample plates fired in reduction\"\u003e\u003cbr\u003eThe color samples shown in the main product images were fired under the following conditions:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Body\u003c\/strong\u003e: Amakusa Pottery Stone (Porcelain)\u003cbr\u003e\u003cspan style=\"font-size: 0.85em; color: #666;\"\u003e(Composition: SiO2 72.04%, Al2O3 18.16%, Fe2O3 0.65%, TiO2 0.04%, CaO 0.49%, MgO 0.09%, Na2O 0.58%, K2O 3.00%, Ig.Loss 4.55%)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Temperature \u0026amp; Atmosphere\u003c\/strong\u003e: 1280°C (2336°F) \/ Reduction Firing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"color: #d32f2f; font-weight: bold; margin-top: 10px;\"\u003e*Note: The color of the underglaze will change depending on your clay body and whether you use oxidation or reduction firing. Please test in your own kiln.\u003c\/p\u003e\n\u003ch2\u003e[Frequently Asked Questions]\u003c\/h2\u003e\n\u003cdl\u003e\n\u003cdt style=\"font-weight: bold; margin-top: 15px;\"\u003eQ: How do I use the pigment?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: It arrives in a highly concentrated paste form. Please dilute it with water according to your purpose. For line drawing (outlining), a general guide is 1 part Gosu to 3 parts water. For Dami (washes), use 1 teaspoon of Gosu to 80ml-250ml of water. Please adjust to find your ideal shade.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: Should I add a binder or adhesive (like gum arabic or CMC)?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Our Gosu does not contain added binders to allow you flexibility. If the pigment is not adhering well to your bisque ware, or if your painting process requires touching the surface repeatedly, we recommend adding a small amount of your preferred binder.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: How should I store it if I won't use it for a long time?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: We recommend storing it tightly sealed in the container. If it dries out, simply add water and grind it again in a mortar to return it to a paste.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: What causes the pigment to crawl or repel during firing?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Applying the pigment too thickly is the most common cause of crawling. It can also be caused by dust or oil (from hands) on the bisque ware before painting.\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003ch2\u003e[Shipping \u0026amp; Postage (International)]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/ZGVsaXZlcnlfMWRheQ.png?cmsp_timestamp=20240605194647\" alt=\"Fast Shipping\"\u003e\u003cbr\u003eIf you place your order \u003cu\u003ebefore noon (JST)\u003c\/u\u003e, it will generally be shipped \u003cspan style=\"color: #d32f2f;\"\u003e\u003cstrong\u003e\u003cu\u003ethe next business day\u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e from our factory in Japan.\u003cbr\u003e\u003cem\u003e*If your order includes made-to-order items like specific glazes, the entire order will be shipped once all items are ready.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAbout Shipping Fees:\u003c\/strong\u003e\u003cbr\u003eShipping costs are \u003cstrong\u003eautomatically calculated at checkout\u003c\/strong\u003e based on the total weight of your order and your delivery address (Country\/Region).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAvailable Shipping Methods:\u003c\/strong\u003e\u003cbr\u003eDuring checkout, you can choose the delivery method that best suits your needs.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eEMS (Express Mail Service)\u003c\/strong\u003e: Fast and reliable with tracking, but shipping fees are higher. Typically arrives in 3 to 7 days depending on the destination.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSurface Mail (Sea Mail)\u003c\/strong\u003e: The most economical option with lower shipping fees, but delivery is slow. It typically takes 1 to 3 months to arrive.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003e*Please note that customs duties or import taxes may apply upon arrival in your country, which are the responsibility of the buyer.\u003c\/em\u003e\u003c\/p\u003e","brand":"株式会社深海商店","offers":[{"title":"Paste 100g","offer_id":49065023111459,"sku":"103480","price":2000.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0523\/0115\/files\/073__No2_EC-min.jpg?v=1723448489"},{"product_id":"167660337","title":"Old Chinese Gosu 3 underglaze(100g)","description":"\u003ch2\u003e[Quality \u0026amp; Craftsmanship]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"High quality Arita blue and white porcelain\" src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/Y2FwLTE0LW1pbg.jpg?cmsp_timestamp=20240605201618\"\u003e\u003cbr\u003eFor over half a century, blue and white porcelain (Sometsuke) and Somenishiki ware created using Fukaumi Shouten's Gosu (blue underglaze) have been beloved by royalty and aristocrats worldwide, and proudly exhibited in museums.\u003cbr\u003e\u003cbr\u003e\u003cstrong style=\"color: #005bd3;\"\u003eFeatured on the BBC and Japanese National Television\u003c\/strong\u003e\u003cbr\u003eOur profound history and traditional techniques caught the attention of the world when we were featured on the prestigious UK television series, \u003cstrong\u003eBBC's \u003cem\u003e\"Great Japanese Railway Journeys\"\u003c\/em\u003e\u003c\/strong\u003e.\u003cbr\u003eIn Japan, artists utilizing our Gosu have been featured on prominent programs such as \"Wafu Souhonke\" and NHK's \"Ippin,\" which highlight the nation's finest traditional craftsmanship.\u003cbr\u003e\u003cbr\u003eOur products are also trusted for official signage at research institutions and government agencies throughout Japan. We promise to deliver this world-recognized, authentic Arita Blue directly to your studio.\u003c\/p\u003e\n\u003ch2\u003e[The Manufacturing Process]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc\/DSC01766-min.jpg?cmsp_timestamp=20221222111934\" alt=\"Gosu production process with traditional stone mill\"\u003e\u003cbr\u003eTo maintain this exceptional quality, it takes more than a month from the start of production to completion for Fukaumi Shouten's Gosu.\u003cbr\u003e\u003cbr\u003eBy combining \u003cstrong\u003e\u003cu\u003eFukaumi Shouten's unique ingredient blend\u003c\/u\u003e\u003c\/strong\u003e, \u003cstrong\u003e\u003cu\u003eour proprietary firing technique (Calcination)\u003c\/u\u003e\u003c\/strong\u003e, and \u003cstrong\u003e\u003cu\u003ethe only stone-milling technology in Japan to micro-pulverize the grains\u003c\/u\u003e\u003c\/strong\u003e, we achieve the ultimate underglaze.\u003cbr\u003e\u003cbr\u003eThrough these rigorous processes, \u003cstrong\u003e\u003cu\u003ebrushstrokes become incredibly smooth, and the Gosu is highly resistant to burning out, even at high concentrations\u003c\/u\u003e\u003c\/strong\u003e.\u003cbr\u003e\u003cstrong\u003e\u003cu\u003eYou will not need to hand-grind the pigment yourself once it arrives; it is ready to use.\u003c\/u\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003eFukaumi Shouten is the only historic Gosu manufacturer that sells its products directly online to individuals worldwide. That is why we can offer authentic, professional-grade quality directly from our factory.\u003c\/p\u003e\n\u003cdiv class=\"youtube\" style=\"margin: 30px 0;\"\u003e\u003ciframe width=\"100%\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/1myOuT9yp4s?si=J6uVaUCtCXrHTky3\" title=\"Fukaumi Shouten Gosu Manufacturing Process\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003ch2\u003e[The History of Gosu in Arita]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0yNC1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Antique Arita ware showing traditional blue underglaze\"\u003e\u003cbr\u003eThe synthetic Gosu currently used throughout Japan was developed by the Fukaumi family during the early Meiji period (late 19th century).\u003cbr\u003e\u003cbr\u003eIn 1870, the renowned German chemist Gottfried Wagener was invited to Arita.\u003cbr\u003eDr. Wagener taught Heizaemon Fukaumi and his sons, Suminosuke and Takeji, the chemical method of producing the color blue using cobalt.\u003cbr\u003e\u003cbr\u003eFollowing this, the Fukaumi family conducted extensive research and successfully developed a scientific method for producing stable Gosu.\u003cbr\u003eAs a result, vivid and reliable synthetic Gosu began to be widely used in Arita and across Japan, establishing the world-famous \"Japan Blue\".\u003cbr\u003e\u003cbr\u003ePlease experience our premium Gosu, born from centuries of history, tradition, and the power of chemistry.\u003cbr\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/a29qb3Bob3Rvcy0zNS1taW4.jpg?cmsp_timestamp=20240605191806\" alt=\"Fukaumi Shouten Gosu powder and paste\" style=\"margin-top: 15px;\"\u003e\u003c\/p\u003e\n\u003ch2\u003e[How to Use]\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Type\u003c\/strong\u003e: Suitable for both Porcelain and Stoneware\/Earthenware.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Method\u003c\/strong\u003e: Suitable for both Oxidation and Reduction firing.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eOptimal Firing Temperature\u003c\/strong\u003e: 1230°C – 1300°C (2246°F – 2372°F)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e[Firing Conditions for Sample Plates]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/MjAyNDAxR09TVV9zYW1wbGVzLW1pbg.jpg?cmsp_timestamp=20240605194159\" alt=\"Gosu color sample plates fired in reduction\"\u003e\u003cbr\u003eThe color samples shown in the main product images were fired under the following conditions:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eClay Body\u003c\/strong\u003e: Amakusa Pottery Stone (Porcelain)\u003cbr\u003e\u003cspan style=\"font-size: 0.85em; color: #666;\"\u003e(Composition: SiO2 72.04%, Al2O3 18.16%, Fe2O3 0.65%, TiO2 0.04%, CaO 0.49%, MgO 0.09%, Na2O 0.58%, K2O 3.00%, Ig.Loss 4.55%)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFiring Temperature \u0026amp; Atmosphere\u003c\/strong\u003e: 1280°C (2336°F) \/ Reduction Firing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"color: #d32f2f; font-weight: bold; margin-top: 10px;\"\u003e*Note: The color of the underglaze will change depending on your clay body and whether you use oxidation or reduction firing. Please test in your own kiln.\u003c\/p\u003e\n\u003ch2\u003e[Frequently Asked Questions]\u003c\/h2\u003e\n\u003cdl\u003e\n\u003cdt style=\"font-weight: bold; margin-top: 15px;\"\u003eQ: How do I use the pigment?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: It arrives in a highly concentrated paste form. Please dilute it with water according to your purpose. For line drawing (outlining), a general guide is 1 part Gosu to 3 parts water. For Dami (washes), use 1 teaspoon of Gosu to 80ml-250ml of water. Please adjust to find your ideal shade.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: Should I add a binder or adhesive (like gum arabic or CMC)?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Our Gosu does not contain added binders to allow you flexibility. If the pigment is not adhering well to your bisque ware, or if your painting process requires touching the surface repeatedly, we recommend adding a small amount of your preferred binder.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: How should I store it if I won't use it for a long time?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: We recommend storing it tightly sealed in the container. If it dries out, simply add water and grind it again in a mortar to return it to a paste.\u003c\/dd\u003e\n\u003cdt style=\"font-weight: bold;\"\u003eQ: What causes the pigment to crawl or repel during firing?\u003c\/dt\u003e\n\u003cdd style=\"margin-bottom: 10px;\"\u003eA: Applying the pigment too thickly is the most common cause of crawling. It can also be caused by dust or oil (from hands) on the bisque ware before painting.\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003ch2\u003e[Shipping \u0026amp; Postage (International)]\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/img21.shop-pro.jp\/PA01482\/710\/etc_base64\/ZGVsaXZlcnlfMWRheQ.png?cmsp_timestamp=20240605194647\" alt=\"Fast Shipping\"\u003e\u003cbr\u003eIf you place your order \u003cu\u003ebefore noon (JST)\u003c\/u\u003e, it will generally be shipped \u003cspan style=\"color: #d32f2f;\"\u003e\u003cstrong\u003e\u003cu\u003ethe next business day\u003c\/u\u003e\u003c\/strong\u003e\u003c\/span\u003e from our factory in Japan.\u003cbr\u003e\u003cem\u003e*If your order includes made-to-order items like specific glazes, the entire order will be shipped once all items are ready.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAbout Shipping Fees:\u003c\/strong\u003e\u003cbr\u003eShipping costs are \u003cstrong\u003eautomatically calculated at checkout\u003c\/strong\u003e based on the total weight of your order and your delivery address (Country\/Region).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAvailable Shipping Methods:\u003c\/strong\u003e\u003cbr\u003eDuring checkout, you can choose the delivery method that best suits your needs.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eEMS (Express Mail Service)\u003c\/strong\u003e: Fast and reliable with tracking, but shipping fees are higher. Typically arrives in 3 to 7 days depending on the destination.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSurface Mail (Sea Mail)\u003c\/strong\u003e: The most economical option with lower shipping fees, but delivery is slow. It typically takes 1 to 3 months to arrive.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003e*Please note that customs duties or import taxes may apply upon arrival in your country, which are the responsibility of the buyer.\u003c\/em\u003e\u003c\/p\u003e","brand":"株式会社深海商店","offers":[{"title":"Paste 100g","offer_id":49065199108387,"sku":"100360","price":2000.0,"currency_code":"JPY","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0787\/0523\/0115\/files\/054___EC-min.jpg?v=1770940602"}],"url":"https:\/\/shop.enogu-fukaumi.co.jp\/en-us\/collections\/ranking.oembed?page=57","provider":"深海商店オンラインストア","version":"1.0","type":"link"}