{"title":"Underglaze","description":"\u003cp data-start=\"1608\" data-end=\"1952\" style=\"text-align: center;\"\u003eExplore our collection of ceramic underglazes, offering vibrant, versatile colours designed for detailed pottery decoration and surface design that can be applied to both greenware and bisque-fired ceramics.\u003c\/p\u003e\n\u003cp data-start=\"1954\" data-end=\"2324\" style=\"text-align: center;\"\u003eThis collection includes a wide range of pottery underglazes suitable for brush painting, illustration, carving, sgraffito, stamping, slip decoration, and layered surface techniques. Available in a broad palette of colours which can be used on their own for a matte, velvety finish or covered with a transparent glaze to produce a glossy, durable surface while preserving colour intensity.\u003c\/p\u003e\n\u003cp data-start=\"3244\" data-end=\"3375\" style=\"text-align: center;\"\u003eBrowse our full range of ceramic underglazes and discover vibrant colours and professional materials for your next pottery project.\u003c\/p\u003e","products":[{"product_id":"speedball-underglaze-amethyst","title":"Speedball Underglaze: Amethyst","description":"\u003cp\u003e\u003cspan data-sheets-root=\"1\"\u003eSpeedball’s purple amethyst underglaze is unmatched in vibrancy and value. These underglazes hold their true colour throughout the firing process.\u003c\/span\u003e\u003c\/p\u003e","brand":"Speedball","offers":[{"title":"Default Title","offer_id":47817946104152,"sku":"E208A","price":9.36,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0803\/1567\/9064\/files\/001034-001092-amethyst_1.jpg?v=1742306968"},{"product_id":"speedball-underglaze-aqua","title":"Speedball Underglaze: Aqua","description":"\u003cp\u003e\u003cspan data-sheets-root=\"1\"\u003eSpeedball’s Aqua underglaze is unmatched in vibrancy and value. These underglazes hold their true colour throughout the firing process.\u003c\/span\u003e\u003c\/p\u003e","brand":"Speedball","offers":[{"title":"Default Title","offer_id":47817946300760,"sku":"E196A","price":6.71,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0803\/1567\/9064\/files\/001010-001060-aqua_1.jpg?v=1742306886"},{"product_id":"speedball-underglaze-avocado","title":"Speedball Underglaze: Avocado","description":"\u003cp\u003e\u003cspan data-sheets-root=\"1\"\u003eSpeedball’s avocado green underglaze is unmatched in vibrancy and value. These underglazes hold their true colour throughout the firing process.\u003c\/span\u003e\u003c\/p\u003e","brand":"Speedball","offers":[{"title":"Default Title","offer_id":47817946497368,"sku":"E206B","price":7.42,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0803\/1567\/9064\/files\/001031-001089-avocado_1.jpg?v=1742306887"},{"product_id":"speedball-underglaze-black","title":"Speedball Underglaze: Black","description":"\u003cp\u003e\u003cspan data-sheets-root=\"1\"\u003eSpeedball’s black underglaze is unmatched in vibrancy and value. These underglazes hold their true colour throughout the firing process.\u003c\/span\u003e\u003c\/p\u003e","brand":"Speedball","offers":[{"title":"57ml (2oz)","offer_id":47817946825048,"sku":"E199A","price":8.12,"currency_code":"GBP","in_stock":true},{"title":"473ml (16oz)","offer_id":47817946857816,"sku":"F087","price":27.81,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0803\/1567\/9064\/files\/001016-001066-black_1.jpg?v=1742306886"},{"product_id":"speedball-underglaze-blue-frost","title":"Speedball Underglaze: Blue Frost","description":"\u003cp\u003e\u003cspan data-sheets-root=\"1\"\u003eSpeedball’s blue frost underglaze is unmatched in vibrancy and value. These underglazes hold their true colour throughout the firing process.\u003c\/span\u003e\u003c\/p\u003e","brand":"Speedball","offers":[{"title":"Default Title","offer_id":47817947119960,"sku":"E207B","price":6.71,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0803\/1567\/9064\/files\/0010333-001091-blue-frost_1.jpg?v=1742306886"},{"product_id":"speedball-underglaze-brown","title":"Speedball Underglaze: Brown","description":"\u003cp\u003e\u003cspan data-sheets-root=\"1\"\u003eSpeedball’s brown underglaze is unmatched in vibrancy and value. These underglazes hold their true colour throughout the firing process.\u003c\/span\u003e\u003c\/p\u003e","brand":"Speedball","offers":[{"title":"Default Title","offer_id":47817947349336,"sku":"E198B","price":6.71,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0803\/1567\/9064\/files\/001015-001065-brown_1.jpg?v=1742306886"},{"product_id":"speedball-underglaze-burgundy","title":"Speedball Underglaze: Burgundy","description":"\u003cp\u003e\u003cspan data-sheets-root=\"1\"\u003eSpeedball’s burgundy underglaze is unmatched in vibrancy and value. These underglazes hold their true colour throughout the firing process.\u003c\/span\u003e\u003c\/p\u003e","brand":"Speedball","offers":[{"title":"Default Title","offer_id":47817947513176,"sku":"E201B","price":10.62,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0803\/1567\/9064\/files\/001021-001071-burgundy_1.jpg?v=1742306886"},{"product_id":"speedball-underglaze-carmine","title":"Speedball Underglaze: Carmine","description":"\u003cp\u003e\u003cspan data-sheets-root=\"1\"\u003eSpeedball’s carmine red underglaze is unmatched in vibrancy and value. These underglazes hold their true colour throughout the firing process.\u003c\/span\u003e\u003c\/p\u003e","brand":"Speedball","offers":[{"title":"Default Title","offer_id":47817947775320,"sku":"E203B","price":9.36,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0803\/1567\/9064\/files\/001025-001075-carmine_1.jpg?v=1742306886"},{"product_id":"speedball-underglaze-chartreuse","title":"Speedball Underglaze: Chartreuse","description":"\u003cp\u003e\u003cspan data-sheets-root=\"1\"\u003eSpeedball’s chartreuse green underglaze is unmatched in vibrancy and value. These underglazes hold their true colour throughout the firing process.\u003c\/span\u003e\u003c\/p\u003e","brand":"Speedball","offers":[{"title":"Default Title","offer_id":47817948299608,"sku":"E196B","price":6.71,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0803\/1567\/9064\/files\/001011-001061-chartreuse_1.jpg?v=1742306886"},{"product_id":"speedball-underglaze-cream","title":"Speedball Underglaze: Cream","description":"\u003cp\u003e\u003cspan data-sheets-root=\"1\"\u003eSpeedball’s cream underglaze is unmatched in vibrancy and value. These underglazes hold their true colour throughout the firing process.\u003c\/span\u003e\u003c\/p\u003e","brand":"Speedball","offers":[{"title":"Default Title","offer_id":47817948528984,"sku":"E191B","price":6.71,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0803\/1567\/9064\/files\/speedball_-_cream_1_1.jpg?v=1742306886"},{"product_id":"speedball-underglaze-flame-red","title":"Speedball Underglaze: Flame Red","description":"\u003cp\u003e\u003cspan data-sheets-root=\"1\"\u003eSpeedball’s flame red underglaze is unmatched in vibrancy and value. These underglazes hold their true colour throughout the firing process.\u003c\/span\u003e\u003c\/p\u003e","brand":"Speedball","offers":[{"title":"Default Title","offer_id":47817948954968,"sku":"E204A","price":9.36,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0803\/1567\/9064\/files\/001026-001076-flame-red_1.jpg?v=1742306886"},{"product_id":"speedball-underglaze-grey","title":"Speedball Underglaze: Grey","description":"\u003cp\u003e\u003cspan data-sheets-root=\"1\"\u003eSpeedball’s grey underglaze is unmatched in vibrancy and value. These underglazes hold their true colour throughout the firing process.\u003c\/span\u003e\u003c\/p\u003e","brand":"Speedball","offers":[{"title":"Default Title","offer_id":47817949118808,"sku":"E199B","price":6.71,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0803\/1567\/9064\/files\/001017-001067-grey_1.jpg?v=1742306886"},{"product_id":"speedball-underglaze-leaf-green","title":"Speedball Underglaze: Leaf Green","description":"\u003cp\u003e\u003cspan data-sheets-root=\"1\"\u003eSpeedball’s leaf green underglaze is unmatched in vibrancy and value. These underglazes hold their true colour throughout the firing process.\u003c\/span\u003e\u003c\/p\u003e","brand":"Speedball","offers":[{"title":"Default Title","offer_id":47817949315416,"sku":"E206A","price":7.42,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0803\/1567\/9064\/files\/001030-001088-leaf-green_1.jpg?v=1742306886"},{"product_id":"speedball-underglaze-mandarin-orange","title":"Speedball Underglaze: Mandarin Orange","description":"\u003cp\u003e\u003cspan data-sheets-root=\"1\"\u003eSpeedball’s mandarin orange underglaze is unmatched in vibrancy and value. These underglazes hold their true colour throughout the firing process.\u003c\/span\u003e\u003c\/p\u003e","brand":"Speedball","offers":[{"title":"Default Title","offer_id":47817949872472,"sku":"E204B","price":9.36,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0803\/1567\/9064\/files\/001027-001077-mandarin-orange_1.jpg?v=1742306886"},{"product_id":"speedball-underglaze-medium-blue","title":"Speedball Underglaze: Medium Blue","description":"\u003cp\u003e\u003cspan data-sheets-root=\"1\"\u003eSpeedball’s medium blue underglaze is unmatched in vibrancy and value. These underglazes hold their true colour throughout the firing process.\u003c\/span\u003e\u003c\/p\u003e","brand":"Speedball","offers":[{"title":"Default Title","offer_id":47817950101848,"sku":"E194B","price":6.71,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0803\/1567\/9064\/files\/001007-001057-medium-blue_1.jpg?v=1742306886"},{"product_id":"speedball-underglaze-medium-green","title":"Speedball Underglaze: Medium Green","description":"\u003cp\u003e\u003cspan data-sheets-root=\"1\"\u003eSpeedball’s medium green underglaze is unmatched in vibrancy and value. 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