{"title":"Potclays","description":"","products":[{"product_id":"potclays-oxidising-st-thomas","title":"Potclays Oxidising St Thomas 12.5kg","description":"\u003cp\u003eExtremely popular general purpose high earthenware and stoneware body from Potclays. A very attractively speckling under normal or slightly reducing conditions. Excellent resilience and tolerance. Good warp and crack resistance. Throws and slabs well. Outstanding for school use. Fires to toasted buff.\u003c\/p\u003e\n\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e\u003cspan\u003eFiring Temperature 1150°C - 1280°C\u003c\/span\u003e\u003c\/p\u003e","brand":"Potclays","offers":[{"title":"Default Title","offer_id":42240793149657,"sku":"150-1102","price":16.02,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0606\/3325\/2057\/products\/150-1102-766x547.jpg?v=1764590399"},{"product_id":"25-kg-1145-white-s-w","title":"Potclays White Stoneware 12.5kg","description":"\u003ch2 data-mce-fragment=\"1\"\u003eWhite Stoneware 1200-1300C\u003c\/h2\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003e12.5KG bag\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e \u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003e157-1145 White Stoneware\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eSuperb, strong stoneware throwing body based on top quality porcelain china clay and ball clays with added flux for good 'ring'. Excellent domestic ware body suitable for large and small wares. Smooth textured but stands well and can be thrown quite thinly. Shows colour well.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eRecommended firing range 1200-1300C\u003c\/p\u003e","brand":"Potclays","offers":[{"title":"Default Title","offer_id":42328067047641,"sku":"PC1145","price":23.59,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0606\/3325\/2057\/files\/42-157-1145_1.webp?v=1787825363"},{"product_id":"12-5-kg-vulcan-vuf","title":"Potclays Vulcan Black Stoneware Fine 12.5kg","description":"\u003cmeta charset=\"UTF-8\"\u003e\n\u003ch2 data-mce-fragment=\"1\"\u003eVulcan Black Stoneware (Fine) 1200-1240C\u003c\/h2\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eVulcan™ Black Stoneware (Fine) 164-VUF: Recommended 1200-1240C\u003cbr data-mce-fragment=\"1\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eVulcan Black Stoneware is unlike any other on the market, providing an unusual intense brown-black colour when fired in an oxidising atmosphere. In a reducing atmosphere a metallic finish with shades of blue is obtained (Note: Too-heavy reduction will cause bloating).\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eContaining 40% fine grog (up to 80 mesh), \u003cstrong data-mce-fragment=\"1\"\u003eVulcan Black Stoneware Fine\u003c\/strong\u003e has been formulated for artistic ceramics. It behaves excellently during drying\/firing and its high plasticity makes it ideal for modelling. It is widely used for murals and sculpture and is ideal for detailed work. Supplied in a 12.5kg bag.\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cem data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eVulcan Black Stoneware (Fine) 164-VUF is suitable for tableware (food-safe), according to \u003ca href=\"https:\/\/www.potclays.co.uk\/index.php?route=ocdownload\/request\u0026amp;download_id=90\u0026amp;language_id=1\" data-mce-fragment=\"1\" data-mce-href=\"https:\/\/www.potclays.co.uk\/index.php?route=ocdownload\/request\u0026amp;download_id=90\u0026amp;language_id=1\"\u003eISO 6486\u003c\/a\u003e when fired as recommended (less than 3% porosity).\u003c\/strong\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eFiring range: Cone 5-6 (2205º-2269ºF)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eBiscuit: Cone 06 (1855ºF)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eWater content: 21%\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003ePlasticity (IP Atterberg): 22\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eCarbonate content (CaCO3): 0%\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eDrying shrinkage: 7.0%\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eFiring shrinkage at Cone 6: 7.1%\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003ePorosity (water absorption) at Cone 6: 1.3%\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eDry bending strength: 4.6 N\/mm2\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eFired bending strength at Cone 6: 33.3 N\/mm2\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eThermal coefficient (a25-500ºC): 51.1x10-7ºC-1\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Potclays","offers":[{"title":"Default Title","offer_id":42328067539161,"sku":"164-VUF","price":18.13,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0606\/3325\/2057\/products\/164-vuf_1-766x547.jpg?v=1759158767"},{"product_id":"onyx-black-porcelain","title":"Onyx Black Porcelain 5kg","description":"\u003cmeta charset=\"UTF-8\"\u003e\n\u003ch2 data-mce-fragment=\"1\"\u003eOnyx Black Porcelain (5kg) 1230-1260C\u003c\/h2\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003e164-ONYX - Onyx Black Porcelain \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eOnyx Black Porcelain takes on a beautiful black\/graphite colour when fired as recommended to the upper part of its firing range. It is highly plastic making it ideal for wheel-throwing and modelling alike. Suitable for tableware. Supplied in a 5kg pack. \u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cem data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eOnyx Black Porcelain is suitable for tableware (food-safe), according to \u003ca class=\"bb a_bb\" href=\"https:\/\/www.potclays.co.uk\/index.php?route=ocdownload\/request\u0026amp;download_id=90\u0026amp;language_id=1\" data-mce-fragment=\"1\" data-mce-href=\"https:\/\/www.potclays.co.uk\/index.php?route=ocdownload\/request\u0026amp;download_id=90\u0026amp;language_id=1\"\u003eISO 6486\u003c\/a\u003e.\u003c\/strong\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e1230-1260C \u003c\/p\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eFiring range: Cone 6-7 (2269º-2295ºF)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eBiscuit: Cone 06 (1855ºF)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eWater content: 20%\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003ePlasticity (IP Atterberg): 11\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eCarbonate content (CaCO3): 0%\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eDrying shrinkage: 5.4%\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eFiring shrinkage at Cone 6: 10.3%\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003ePorosity (water absorption) at Cone 6: 0.0%\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eDry bending strength: 3.1 N\/mm2\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eFired bending strength at Cone 6: 39.8 N\/mm2\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eThermal coefficient (a25-500ºC): 54.3x10-7ºC-1\"\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Potclays","offers":[{"title":"Default Title","offer_id":42328067965145,"sku":"ONYXB","price":19.86,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0606\/3325\/2057\/products\/164-onyx_2-766x547.jpg?v=1758218383"},{"product_id":"12-5-kg-157-4230-white-grog-s-w","title":"Potclays White Grogged Stoneware 12.5kg","description":"\u003ch2 data-mce-fragment=\"1\"\u003eWhite Grogged Stoneware 1200-1300C\u003c\/h2\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003e157-4230 White Grogged Stoneware\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eSanded version of Potcalys 157-1142 clay, particularly good for throwing.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eRecommended firing range 1200-1300oC\u003c\/p\u003e","brand":"Potclays","offers":[{"title":"Default Title","offer_id":42328068030681,"sku":"PC157-4230\/12.5","price":16.7,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0606\/3325\/2057\/products\/157-4230-766x547.jpg?v=1758218383"},{"product_id":"grogged-pink","title":"Potclays Grogged Pink","description":"\u003ch2\u003eGrogged Pink 1120-1270C\u003c\/h2\u003e\n\u003cp\u003e12.5kg Bags\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e153-1127 Grogged Pink\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA blend of crank and terracotta clays produces an attractive warm brown fired colour suitbale for slab built forms, coiled pots and tiles, giving a general purpose hand-building body with good tooth and character. Pleasant pink colour around 1100-1160C becoming darker at stoneware. Good warp and crack resistance.\u003c\/p\u003e\n\u003cp\u003eRecommended Firing Range 1120-1270C\u003c\/p\u003e","brand":"Potclays","offers":[{"title":"Default Title","offer_id":42450004541657,"sku":"153-1127Grogpink","price":18.08,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0606\/3325\/2057\/products\/153-1127-766x547.jpg?v=1758219995"},{"product_id":"white-special-stoneware-157-1142","title":"Potclays White Special Stoneware 12.5kg","description":"\u003ch1 data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eWhite Special Stoneware 1200-1300C\u003c\/strong\u003e\u003c\/h1\u003e\n\u003cp\u003e\u003cstrong data-mce-fragment=\"1\"\u003e12.5Kg bags\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2\u003eWhite Special Stoneware 1200-1300C\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003e157-1142 White Special Stoneware\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA white-burning, refractory, smooth-textured body which throws and handles well. A very good domestic ware body of excellent colour and perfomance and almost a smooth, sliphoused version of 157-1145.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Potclays","offers":[{"title":"Default Title","offer_id":42487193305305,"sku":"157-1142","price":15.35,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0606\/3325\/2057\/files\/157-1142_1-766x547.jpg?v=1764590283"},{"product_id":"potclays-original-craft-crank","title":"Potclays Original Craft Crank Stoneware 12.5kg","description":"\u003cmeta charset=\"UTF-8\"\u003e\n\u003ch2 data-mce-fragment=\"1\"\u003eOriginal Craft Crank 1170-1300C\u003c\/h2\u003e\n\u003cp\u003e12.5Kg\u003cbr\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003e153-1114 Original Craft Crank\u003c\/strong\u003e™\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eOne of our flagship clays, the original Craft Crank is often copied but never bettered. Carefully graded grog additions to a superb blend of clays makes this clay outstanding for all larger forms of slabbing and handbuilding The unique plasticity of the clay enables the more adventurous potter to throw with it.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eRecommended Firing Range  1170-1300C\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eTIP: The trademark Craft Crank toasted colour occurs when the soluble salts in the body combine with the iron content at higher temperatures. This toasting is more pronounced in thicker section ware which has been dried slowly and fired to a higher temperature.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Potclays","offers":[{"title":"Default Title","offer_id":42575138128089,"sku":"152-114","price":22.14,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0606\/3325\/2057\/products\/153-1114-766x547.jpg?v=1758218384"},{"product_id":"potclays-white-earthenware-sanded-1100-1240c-12-5kg","title":"Potclays White Earthenware Sanded Earthenware 12.5kg","description":"\u003ch2 data-mce-fragment=\"1\"\u003eWhite Earthenware Sanded 1100-1240C\u003c\/h2\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003e158-4130 Grogged White\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eGeneral purpose white earthenware body of exceptional handling properties arising from the inclusion of white sand\/grog into the plastic LT25 base. Throws well and suitable for larger pots also.\u003c\/p\u003e","brand":"Potclays","offers":[{"title":"Default Title","offer_id":42697088958681,"sku":"158-4130","price":21.47,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0606\/3325\/2057\/products\/158-4130-766x547-2.jpg?v=1758219996"},{"product_id":"flecked-stoneware-152-1109-potclays","title":"Potclays Flecked Stoneware 12.5kg","description":"\u003cmeta charset=\"UTF-8\"\u003e\n\u003ch2 data-mce-fragment=\"1\"\u003eFlecked Stoneware 1150-1290C  12.5kg\u003c\/h2\u003e\n\u003cp data-mce-fragment=\"1\"\u003eRecommended Firing Range 1150-1290C\u003c\/p\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eAttractively flecked stoneware body based on a ball clay blend.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eSuperb throwing properties for small or large pieces.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eFlecking burns nicely through covering glazes giving a reduction fired appearance under oxidising conditions.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eAn extremely good body for thrown domestic stoneware.There may be some variation in fleck size and\/or density from batch to batch due to the nature of the material\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eA note regarding fleck variation: \u003c\/strong\u003eThe fleck size\/density in our flecked bodies is variable from batch to batch due to the nature of the raw material supplied to us. The user must sample\/batch test in their own application before proceeding. Potclays cannot accept any liability for fleck variations batch-to-batch which are outside of our control.\u003c\/p\u003e","brand":"Potclays","offers":[{"title":"Default Title","offer_id":42801708466393,"sku":"157-1109","price":21.6,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0606\/3325\/2057\/products\/152-1109-766x547.jpg?v=1758219997"},{"product_id":"premium-craft-crank-1170-1300c","title":"Potclays Premium Craft Crank Stoneware 12.5kg","description":"\u003cmeta charset=\"UTF-8\"\u003e\n\u003ch2 data-mce-fragment=\"1\"\u003e\u003cspan\u003e153-3114\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch2 data-mce-fragment=\"1\"\u003ePremium Craft Crank 1170-1300C - 12.5kg\u003c\/h2\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eRecommended firing range 1170-1300C\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eOur Premium Craft Crank™ clay is manufactured by powder-blending ball clays and our unique lime-free Hi-Pur grogs to produce a fireclay-free clay.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eOffered as an alternative to our original Craft Crank, it copes well with the larger forms and is only bettered by the original Craft Crank.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Potclays","offers":[{"title":"Default Title","offer_id":42807483760857,"sku":"153-3114","price":22.62,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0606\/3325\/2057\/products\/153-3114-766x547.jpg?v=1758219998"},{"product_id":"vulcan-black-stoneware-medium","title":"Potclays Vulcan Black Stoneware Medium 12.5kg","description":"\u003cmeta charset=\"UTF-8\"\u003e\n\u003ch2\u003eVulcan Black Stoneware (Medium) 1200-1260C\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eVulcan™ Black Stoneware (Medium) 164-VUM  |  Recommended firing 1200-1260C \/ Cone 5-7\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eRecipe Adjustment: \u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003eFrom batch number 2322 (week 23, 2022) onwards, recipe adjustments were made to the Vulcan recipe due to unavailability of a raw material. \u003cstrong\u003eSIO-2's primary advice is to use glazes with a medium-high thermal expansion (further information in the technical notes below).\u003c\/strong\u003e Through our own tests here at Potclays, we recommend not to exceed Cone 6, and if your controller will allow, it is beneficial to programme a controlled cooling segment \u0026lt;50c\/hr from 200-50C.\u003c\/span\u003e\u003cem\u003e\u003cspan\u003e \u003c\/span\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003eVulcan Black Stoneware is unlike any other on the market, providing an unusual intense brown-black colour when fired in an oxidising atmosphere. In a reducing atmosphere a metallic finish with shades of blue are obtained. Containing a medium grog (up to 35 mesh) Vulcan Black Stoneware Medium has been formulated especially for artistic ceramics. It behaves excellently during drying\/firing and its high plasticity makes it ideal for modelling. It is widely used for murals and sculpture and is ideal for handbuilding. Supplied in a 12.5kg bag.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTypical Data:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFiring range: 1200-1260C \/ Cone 5-7\u003c\/li\u003e\n\u003cli\u003eBiscuit: Cone 06 (1855ºF)\u003c\/li\u003e\n\u003cli\u003eTexture 4-5 on our indicative texture scale, smooth1 coarse 10.\u003c\/li\u003e\n\u003cli\u003eWater content: 21%\u003c\/li\u003e\n\u003cli\u003ePlasticity (IP Atterberg): 22\u003c\/li\u003e\n\u003cli\u003eCarbonate content (CaCO3): 0%\u003c\/li\u003e\n\u003cli\u003eDrying shrinkage: 7.0%\u003c\/li\u003e\n\u003cli\u003eFiring shrinkage at Cone 7: 4.5%\u003c\/li\u003e\n\u003cli\u003ePorosity (water absorption) at Cone 7: 9.4%\u003c\/li\u003e\n\u003cli\u003eDry bending strength: 2.0 N\/mm2\u003c\/li\u003e\n\u003cli\u003eFired bending strength at Cone 7: 27.5 N\/mm2\u003c\/li\u003e\n\u003cli\u003eThermal coefficient (a25-500ºC): 55.8x10-7ºC-1\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eTechnical Notes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eVulcan Black Stoneware (Medium) is not recommended for tableware due to the grog content. Please see \u003ca href=\"https:\/\/www.potclays.co.uk\/vulcan-black-stoneware-(fine)\"\u003eVulcan Black Stoneware (Fine)\u003c\/a\u003e instead.\u003c\/li\u003e\n\u003cli\u003eVulcan clay bodies are non-toxic according to European Rules (CLP) and also American Rules (ASTM D 4236). The manganese dioxide content in Vulcan bodies is lower than 5%: Under the CLP regulation, the manganese dioxide content required for classification as toxic must be greater than 25%. \u003c\/li\u003e\n\u003cli\u003eUse zinc-free (Zn-free) glazes to prevent unexpected reactions such as bubbling or colour changes. Other elements that can react are zirconium (Zr) and tin (Sn). We have found that \u003ca href=\"https:\/\/www.potclays.co.uk\/sw-zincfreeclr-5lb\" title=\"Mayco zinc-free clear glaze\"\u003eMayco zinc-free clear glaze\u003c\/a\u003e is suitable for use with Vulcan bodies and does not seem to suffer from the usual problems caused by outgassing from the high oxide levels in black bodies. Many ^6 commercial glazes such as Mayco perform well on Vulcan but trial-and-error is needed. Also see our \u003ca href=\"https:\/\/www.instagram.com\/potclaysglazes\/\"\u003epotclaysglazes\u003c\/a\u003e Instagram feed\/highlights.\u003c\/li\u003e\n\u003cli\u003eSIO-2 warn against using glazes with a low coefficient of thermal expansion (a25-300ºC \u0026lt;60x10-7ºC-1). The Vulcan clay fired at high temperature has a high coefficient of thermal expansion in the range of 100 to 200ºC, which causes tensions between the glaze and the body, mainly in pieces glazed on one side only, which can cause breakage during cooling in the kiln or even later (for example, when pouring hot water inside). Check with your usual glaze supplier to ensure that you use glazes with a medium-high coefficient of thermal expansion (a25-300ºC \u0026gt;60x10-7ºC-1).\u003c\/li\u003e\n\u003cli\u003eVulcan Black Stoneware is no longer recommended for use in casting slips due to the high plasticity which makes it difficult to correctly deflocculate.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\u003c\/ul\u003e","brand":"Potclays","offers":[{"title":"Default Title","offer_id":42807498670297,"sku":"164-VUM","price":18.13,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0606\/3325\/2057\/products\/164-vum_1-766x547.jpg?v=1759158888"},{"product_id":"david-wright-hand-building-body-1200-1300c","title":"David Wright Hand Building Body 1200-1300C","description":"\u003cmeta charset=\"UTF-8\"\u003e\n\u003ch2 data-mce-fragment=\"1\"\u003eDavid Wright Hand Building Body 1200-1300C\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003e153-2152\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eA medium to coarse-textured, iron-bearing body developed for hand-building in collaboration with potter David Wright. It is based on a combination of ball clays, fireclay from our South Staffordshire quarry and a blend of grogs and sands, all combined using our trademark panmilling method for superior plasticity and aggregate distribution. It is ideal for hand-building, particularly medium sized to small work where finer and detailed surfaces are required. It responds exceptionally well to reduction firing - in particular, wood-firing. Fires to a light buff in oxidation and a toasted buff under reduction with some iron speckles.\u003cbr data-mce-fragment=\"1\"\u003e\u003cem data-mce-fragment=\"1\"\u003e \u003c\/em\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cem data-mce-fragment=\"1\"\u003eFurther notes:\u003c\/em\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThe David Wright Hand-Building Body was developed with the goal of achieving a smoother, lower porosity body with the look and character of Industrial Crank, for David’s thinner, more refined work intended to hold water. Although the recommended temperature range of this body is quoted to 1300C, David successfully fires this body under his specific conditions to Cone 11 down.\u003c\/p\u003e","brand":"Potclays","offers":[{"title":"Default Title","offer_id":43007338283225,"sku":"153-2152","price":21.38,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0606\/3325\/2057\/files\/david_wright.jpg?v=1778324193"},{"product_id":"draycot-stoneware-157-1143","title":"Draycot Stoneware 157 -1143","description":"\u003ch2\u003eDraycott White Stoneware 1200-1300C\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eRecommended firing range 1200-1300C\u003c\/li\u003e\n\u003cli\u003eAn excellent, smooth-textured, white stoneware body based on plastic fireclays and china clays.\u003c\/li\u003e\n\u003cli\u003eThrows well and stands up well on the wheel.\u003c\/li\u003e\n\u003cli\u003eTexture 1 on our indicative texture scale, smooth 1, coarse 10.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePlease note our clay is sold by approximate weight. Your total order weight for a specific clay body will be despatched in the most economic combination of packs possible. If you require individual packs of a specific size, please state this in the Special Instructions during checkout.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eStandard full bag size 12.5Kg\u003c\/p\u003e","brand":"Potclays","offers":[{"title":"Default Title","offer_id":43496632877273,"sku":"157-1143","price":14.76,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0606\/3325\/2057\/files\/41-157-1143_1.webp?v=1787825123"},{"product_id":"artemis-white-grogged-stoneware-1230-1300c-164-arte","title":"Artemis White Grogged Stoneware 1230-1300C 164-arte","description":"\u003cmeta charset=\"UTF-8\"\u003e\n\u003ch2\u003eArtemis White Grogged Stoneware 1230-1300C\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eArtemis White Grogged Stoneware\u003c\/strong\u003e 164-ARTE\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRecommended firing range 1230-1300C \/ Cone 6 to 10\u003c\/li\u003e\n\u003cli\u003eIndicative texture 1-2 (Smooth 1-Coarse 10).\u003c\/li\u003e\n\u003cli\u003eArtemis is a smooth white stoneware clay body with 40% fine grog (up to 80 Mesh).\u003c\/li\u003e\n\u003cli\u003eIdeal for wheel-throwing and modelling fine detail, and is particularly suited to crystalline glazes (see Jose Maria Mariscal's website \u003ca href=\"https:\/\/ceramicasjosemariscal.blogspot.com\/\"\u003ehere\u003c\/a\u003e).\u003c\/li\u003e\n\u003cli\u003eThe high grog content provides excellent performance during drying and firing.\u003c\/li\u003e\n\u003cli\u003eIvory in colour after firing, giving an excellent base for glazes and colouring oxides.\u003c\/li\u003e\n\u003cli\u003eSupplied in a 12.5kg bag.\u003c\/li\u003e\n\u003cli\u003eManufactured by SIO2 (Spain)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eSIO2 technical data:\u003c\/em\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBiscuit: Cone 06 (1020ºC)\u003c\/li\u003e\n\u003cli\u003eWater content: 19%\u003c\/li\u003e\n\u003cli\u003ePlasticity (IP Atterberg): 16\u003c\/li\u003e\n\u003cli\u003eCarbonate content (CaCO3): 0%\u003c\/li\u003e\n\u003cli\u003eDrying shrinkage: 5.9%\u003c\/li\u003e\n\u003cli\u003eFiring shrinkage at Cone 10: 7.0%\u003c\/li\u003e\n\u003cli\u003ePorosity (water absorption) at Cone 10: 0.0%\u003c\/li\u003e\n\u003cli\u003eDry bending strength: 3.0 N\/mm2\u003c\/li\u003e\n\u003cli\u003eFired bending strength at Cone 10: 45.3 N\/mm2\u003c\/li\u003e\n\u003cli\u003eThermal coefficient (a25-500ºC): 52.6x10-7ºC-1\"\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Potclays","offers":[{"title":"Default Title","offer_id":43537688527065,"sku":null,"price":19.74,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0606\/3325\/2057\/products\/image_4088e1e8-c6a2-4827-89d7-0417f9c02cf9.jpg?v=1763375568"},{"product_id":"vulcan-black-stoneware-coarse","title":"Potclays Vulcan Black Stoneware Coarse 12.5kg","description":"\u003cmeta charset=\"UTF-8\"\u003e\n\u003ch2\u003eVulcan Black Stoneware (Coarse) 1200-1260C\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eVulcan™ Black Stoneware (Coarse) 164-VUC  |  Recommended firing 1200-1260C \/ Cone 5-7\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cstrong\u003eRecipe Adjustment:\u003c\/strong\u003e From batch number 2322 (week 23, 2022) onwards, recipe adjustments were made to the Vulcan recipe due to unavailability of a raw material. Fired results should be comparable with previously but as always testing is essential, particularly when glazing.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003eVulcan Black Stoneware is unlike any other on the market, providing an unusual intense brown-black colour when fired in an oxidising atmosphere. In a reducing atmosphere a metallic finish with shades of blue are obtained. Containing a coarse grog (up to 12 mesh) Vulcan Black Stoneware Coarse has been formulated especially for artistic ceramics. It behaves excellently during drying\/firing and its high plasticity makes it ideal for modelling. It is widely used for murals and sculpture and is ideal for larger scale handbuilding. Supplied in a 12.5kg bag.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTypical Data:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFiring range: 1200-1260ºC \/ Cone 5-7\u003c\/li\u003e\n\u003cli\u003eBiscuit temperature: 1000ºC\u003c\/li\u003e\n\u003cli\u003eTexture 8-9 on our indicative texture scale, smooth1, coarse 10.\u003c\/li\u003e\n\u003cli\u003eWater content: 21%\u003c\/li\u003e\n\u003cli\u003ePlasticity (IP Atterberg): 22\u003c\/li\u003e\n\u003cli\u003eCarbonate content (CaCO3): 0%\u003c\/li\u003e\n\u003cli\u003eDrying shrinkage: 7.0%\u003c\/li\u003e\n\u003cli\u003eFiring shrinkage (1260ºC): 3.6%\u003c\/li\u003e\n\u003cli\u003ePorosity (water absorption at 1260ºC): 9.8%\u003c\/li\u003e\n\u003cli\u003eDry bending strength: 2.0 N\/mm2\u003c\/li\u003e\n\u003cli\u003eFired bending strength (1260ºC): 22.0 N\/mm2\u003c\/li\u003e\n\u003cli\u003eThermal coefficient (25-500ºC): 50.3x10^-7ºC^-1\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eTechnical Notes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eVulcan Black Stoneware (Coarse) is not recommended for tableware due to the grog content. Please see \u003ca href=\"https:\/\/www.potclays.co.uk\/vulcan-black-stoneware-(fine)\"\u003eVulcan Black Stoneware (Fine)\u003c\/a\u003e instead.\u003c\/li\u003e\n\u003cli\u003eVulcan is not toxic according to European Rules (CLP) and also American Rules (ASTM D 4236). The manganese dioxide content in Vulcan bodies is lower than 5%: Under the CLP regulation, the manganese dioxide content required for classification as toxic must be greater than 25%. \u003c\/li\u003e\n\u003cli\u003eUse zinc-free (Zn-free) glazes to prevent unexpected reactions such as bubbling or colour changes. Other elements that can react are zirconium (Zr) and tin (Sn). We have found that \u003ca href=\"https:\/\/www.potclays.co.uk\/sw-zincfreeclr-5lb\" title=\"Mayco zinc-free clear glaze\"\u003eMayco zinc-free clear glaze\u003c\/a\u003e is suitable for use with Vulcan bodies and does not seem to suffer from the usual problems caused by outgassing from the high oxide levels in black bodies. Many ^6 commercial glazes such as Mayco perform well on Vulcan but trial-and-error is needed. Also see our \u003ca href=\"https:\/\/www.instagram.com\/potclaysglazes\/\"\u003epotclaysglazes\u003c\/a\u003e Instagram feed\/highlights.\u003c\/li\u003e\n\u003cli\u003eVulcan Black Stoneware is no longer recommended for use in casting slips due to the high plasticity which makes it difficult to correctly deflocculate.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\u003c\/ul\u003e","brand":"Potclays","offers":[{"title":"Default Title","offer_id":43780735566041,"sku":"164-VUC","price":18.13,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0606\/3325\/2057\/products\/164-vuc_1-766x547.jpg?v=1759158907"},{"product_id":"staffordshire-stoneware-1200-1300c","title":"Potclays Staffordshire Stoneware 12.5kg","description":"\u003cmeta charset=\"UTF-8\"\u003e\n\u003ch2\u003eStaffordshire Stoneware 1200-1300C\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eStaffordshire Stoneware\u003c\/strong\u003e 152-1115\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRecommended firing range 1200-1300C\u003c\/li\u003e\n\u003cli\u003eIndicative texture 1 (Smooth 1-Coarse 10).\u003c\/li\u003e\n\u003cli\u003eA relatively recent modification of the original and highly successful Pyropot recipe which was a blend of ball clays, fireclays and red marls.\u003c\/li\u003e\n\u003cli\u003eContains fireclay mined from our site in South Staffordshire, near Walsall.\u003c\/li\u003e\n\u003cli\u003eThe high ball clay content imparts exceptional plasticity, making it an ideal throwing body\u003c\/li\u003e\n\u003cli\u003eFireclay imparts refractory qualities whilst red marls give this body its characteristic subtle iron fleck\u003c\/li\u003e\n\u003cli\u003eThe recipe uses a proportion of fireclay sourced from our own mine in South Staffordshire\u003c\/li\u003e\n\u003cli\u003eFiring to warm buff colour, it is particularly suitable for domestic ware\u003c\/li\u003e\n\u003cli\u003eIdeal for oven-to-tableware\u003c\/li\u003e\n\u003cli\u003eStandard full bag size 12.5Kg\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Potclays","offers":[{"title":"Default Title","offer_id":43876807606489,"sku":"152-1115","price":18.52,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0606\/3325\/2057\/products\/152-1115-766x547.jpg?v=1758220002"},{"product_id":"vulcan-black-stoneware-extra-coarse-1200-1260c","title":"Potclays Vulcan Black Stoneware Extra Coarse 12.5kg","description":"\u003cmeta charset=\"UTF-8\"\u003e\n\u003ch2\u003eVulcan Black Stoneware (Extra Coarse) 1200-1260C\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eVulcan™ Black Stoneware (Extra Coarse) 164-VUX  |  Recommended Firing 1200-1260C \/ Cone 5-7\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cstrong\u003eRecipe Adjustment:\u003c\/strong\u003e From batch number 2322 (week 23, 2022) onwards, recipe adjustments were made to the Vulcan recipe due to unavailability of a raw material. Fired results should be comparable with previously but as always testing is essential, particularly when glazing.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003eVulcan Black Stoneware is unlike any other on the market, providing an unusual intense brown-black colour when fired in an oxidising atmosphere. In a reducing atmosphere, a metallic finish with shades of blue is obtained. Containing a very coarse grog (18-7 mesh) Vulcan Black Stoneware Coarse has been formulated especially for artistic ceramics. It behaves excellently during drying\/firing and its high plasticity makes it ideal for modelling. It is widely used for murals and sculpture and is ideal for larger-scale handbuilding. Supplied in a 12.5kg bag.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTypical Data:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFiring range: 1200-1260ºC \/ Cone 5-7\u003c\/li\u003e\n\u003cli\u003eBiscuit temperature: 1000ºC\u003c\/li\u003e\n\u003cli\u003eTexture 9-10 on our indicative texture scale, smooth1, coarse 10.\u003c\/li\u003e\n\u003cli\u003eWater content: 20%\u003c\/li\u003e\n\u003cli\u003ePlasticity (IP Atterberg): 22\u003c\/li\u003e\n\u003cli\u003eCarbonate content (CaCO3): 0%\u003c\/li\u003e\n\u003cli\u003eDrying shrinkage: 6.5%\u003c\/li\u003e\n\u003cli\u003eFiring shrinkage (1260ºC): 4.4%\u003c\/li\u003e\n\u003cli\u003ePorosity (water absorption at 1260ºC): 7.8%\u003c\/li\u003e\n\u003cli\u003eDry bending strength: 3.0 N\/mm2\u003c\/li\u003e\n\u003cli\u003eFired bending strength (1260ºC): 17.7 N\/mm2\u003c\/li\u003e\n\u003cli\u003eThermal coefficient (25-500ºC): 51.3x10^-7ºC^-1\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eTechnical Notes\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eVulcan Black Stoneware (Extra Coarse) is not recommended for tableware due to the grog content. Please see \u003ca href=\"https:\/\/www.potclays.co.uk\/vulcan-black-stoneware-(fine)\"\u003eVulcan Black \u003c\/a\u003e\u003ca href=\"https:\/\/www.kettlespotterysupplies.com\/products\/12-5-kg-vulcan-vuf?_pos=1\u0026amp;_sid=86c32edcb\u0026amp;_ss=r\"\u003eStoneware\u003c\/a\u003e\u003ca href=\"https:\/\/www.potclays.co.uk\/vulcan-black-stoneware-(fine)\"\u003e (Fine)\u003c\/a\u003e instead.\u003c\/li\u003e\n\u003cli\u003eVulcan is not toxic according to European Rules (CLP) and also American Rules (ASTM D 4236). The manganese dioxide content in Vulcan bodies is lower than 5%: Under the CLP regulation, the manganese dioxide content required for classification as toxic must be greater than 25%. \u003c\/li\u003e\n\u003cli\u003eUse zinc-free (Zn-free) glazes to prevent unexpected reactions such as bubbling or colour changes. Other elements that can react are zirconium (Zr) and tin (Sn). We have found that Mayco zinc-free clear glaze is suitable for use with Vulcan bodies and does not seem to suffer from the usual problems caused by outgassing from the high oxide levels in black bodies. Many ^6 commercial glazes such as Mayco perform well on Vulcan but trial-and-error is needed. \u003c\/li\u003e\n\u003cli\u003eVulcan Black Stoneware is no longer recommended for use in casting slips due to the high plasticity which makes it difficult to correctly deflocculate.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\u003c\/ul\u003e","brand":"Potclays","offers":[{"title":"Default Title","offer_id":43909725290713,"sku":"164-VUX","price":18.31,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0606\/3325\/2057\/files\/164-vux_2-766x547.jpg?v=1759158922"},{"product_id":"potclays-lavafleck","title":"Potclays Lavafleck 12.5kg","description":"\u003cp\u003eLavafleck 1200-1270C\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eLavafleck\u003c\/strong\u003e 151-1514\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRecommended firing range 1200-1270C\u003c\/li\u003e\n\u003cli\u003eIndicative texture 4-5 (Smooth 1-Coarse 10)\u003c\/li\u003e\n\u003cli\u003ePopular for its distinctive rustic, flecked character\u003c\/li\u003e\n\u003cli\u003eGood handling for throwing\u003c\/li\u003e\n\u003cli\u003eKiln shelves must be well coated with refractory wash to prevent sticking during firing\u003c\/li\u003e\n\u003cli\u003eStandard full bag size 12.5Kg\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cstrong\u003eInformation about our basalt flecking agent:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eBasalt is a naturally-occurring material and is variable by nature. We have noticed that there has been a slight shift in the melt properties of the material, sometimes causing raised flecks on the fired ware. In our tests, when coated with a sufficient glaze layer, the flecks 'flux' and flatten out. Unglazed areas can be wet sanded after firing. The roughness is not present in reduction firing conditions, only in oxidation.\u003c\/p\u003e\n\u003cp\u003eThe fleck size\/density in our flecked bodies is variable from batch to batch due to the nature of the raw material supplied to us. The user must sample\/batch test in their own application before proceeding as we cannot accept any liability for fleck variations batch-to-batch which are outside of our control.\u003c\/p\u003e\n\u003cp\u003eBasalt is an iron-bearing compound which is not metallic, therefore fired ware can be used in a microwave.\u003c\/p\u003e","brand":"Potclays","offers":[{"title":"Default Title","offer_id":43966593466585,"sku":"151-1514","price":20.54,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0606\/3325\/2057\/files\/151-1514-766x547.jpg?v=1759156803"},{"product_id":"potclays-premium-sanded-buff-1100-1290c","title":"Potclays Premium Sanded Buff 12.5kg","description":"\u003cmeta charset=\"UTF-8\"\u003e\n\u003ch2 data-mce-fragment=\"1\"\u003ePremium Sanded Buff 1100-1290c\u003c\/h2\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003ePremium Sanded Buff\u003c\/strong\u003e 151-1125S\u003c\/p\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eRecommended firing range 1100-1290C\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eIndicative texture 4 (Smooth 1-Coarse 10).\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eApproximately 7% of a BS Mesh -30’s sand has been added to the Premium Buff recipe (described below) to provide extra ‘tooth’.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eEspecially suited to handbuilding and sculptural purposes.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eNew for 2022, our Premium Buff recipe is a re-working of our popular buff clay recipes which had to be discontinued in March 2022 due to unavailability of a staple raw material.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eDeveloped with a higher percentage of premium raw materials including the exclusive Coombe Fireclay available only to Potclays from the Birch Coppice clay mine in South Staffordshire.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eCoombe is a unique fireclay, rich in iron, producing a light fleck when fired at stoneware temperatures.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eA premium alternative to the now-discontinued Sanded Buff 151-1124.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eStandard full bag size 12.5Kg\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Potclays","offers":[{"title":"Default Title","offer_id":43971759014105,"sku":"151-1125S","price":8.51,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0606\/3325\/2057\/files\/151-1125766x547-766x547.jpg?v=1758220004"},{"product_id":"potclays-premium-buff-1100-1290c","title":"Potclays Premium Buff 12.5kg","description":"\u003cmeta charset=\"UTF-8\"\u003e\n\u003ch2\u003ePremium Buff 1100-1290c\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePremium Buff\u003c\/strong\u003e 151-1125\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRecommended firing range 1100-1290C\u003c\/li\u003e\n\u003cli\u003eIndicative texture 2 (Smooth 1-Coarse 10).\u003c\/li\u003e\n\u003cli\u003eNew for 2022, our Premium Buff recipe is a re-working of our popular buff clay recipes which had to be discontinued in March 2022 due to unavailability of a staple raw material.\u003c\/li\u003e\n\u003cli\u003eDeveloped with a higher percentage of premium raw materials including the exclusive Coombe Fireclay available only to Potclays from the Birch Coppice clay mine in South Staffordshire.\u003c\/li\u003e\n\u003cli\u003eCoombe is a unique fireclay, rich in iron, producing a light fleck when fired at stoneware temperatures.\u003c\/li\u003e\n\u003cli\u003eA premium alternative to the now-discontinued 151-1120 and 151-1117.\u003c\/li\u003e\n\u003cli\u003eStandard full bag size 12.5Kg\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\u003c\/ul\u003e","brand":"Potclays","offers":[{"title":"Default Title","offer_id":44145172316377,"sku":"151-1125","price":8.46,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0606\/3325\/2057\/files\/151-1125766x547-766x547-2.jpg?v=1758220005"},{"product_id":"studio-white-earthenware-1100-1220c","title":"Potclays Studio White Earthenware 12.5 kg","description":"\u003ch2\u003eStudio White Earthenware 1100-1220C\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eStudio White Earthenware\u003c\/strong\u003e 158-1141\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRecommended firing range 1100-1220C \/ Cone 02 to 6\u003c\/li\u003e\n\u003cli\u003eIndicative texture 1 (Smooth 1-Coarse 10).\u003c\/li\u003e\n\u003cli\u003eIndicative Dry\u0026gt;Fired Shrinkage @ 1100C 9%; 1200C 14%*\u003c\/li\u003e\n\u003cli\u003eKnown for many years as 'LT25', Studio White Earthenware is a very plastic white earthenware clay consisting of ball and china clays from Devon and Cornwall.\u003c\/li\u003e\n\u003cli\u003eStudio White Earthenware was designed primarily for throwing.\u003c\/li\u003e\n\u003cli\u003eGood 'green' strength and fires to an ivory-white colour.\u003c\/li\u003e\n\u003cli\u003eRelatively high in calcium therefore leadless transparent glazes can fire 'milky'. To avoid this, select a low-solubility glaze such as \u003ca href=\"https:\/\/www.potclays.co.uk\/studio\/products\/7850\/crystal-clear-glaze\"\u003e2204-100M\u003c\/a\u003e. However, for functional ware a leadless alternative such as \u003ca href=\"https:\/\/www.potclays.co.uk\/studio\/products\/14789\/glossy-general-purpose\"\u003e2206\u003c\/a\u003e is recommended.\u003c\/li\u003e\n\u003cli\u003eStandard full bag size 12.5Kg\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Potclays","offers":[{"title":"Default Title","offer_id":44493064437977,"sku":"158-1141","price":21.22,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0606\/3325\/2057\/files\/158-1141-766x547.jpg?v=1758218393"},{"product_id":"y-material-1200-1300c","title":"Y-Material 1200-1300C","description":"\u003ch2\u003eY-Material 1200-1300C\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eY Material \u003c\/strong\u003e156-2161\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRecommended firing range 1200-1300C\u003c\/li\u003e\n\u003cli\u003eIndicative texture 7-8 (Smooth 1-Coarse 10).\u003c\/li\u003e\n\u003cli\u003eIndicative % Total Contraction @ 1200C 8%*\u003c\/li\u003e\n\u003cli\u003eA white firing grogged clay similar to 'T' Material.\u003c\/li\u003e\n\u003cli\u003eSuitable for larger sculpture forms, handbuilding and raku use.\u003c\/li\u003e\n\u003cli\u003eLow thermal expansion \u0026amp; shrinkage, good warp resistance and very refractory, resilient and tolerant.\u003c\/li\u003e\n\u003cli\u003eStandard full bag size 12.5Kg\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Potclays","offers":[{"title":"Default Title","offer_id":54889493889400,"sku":"156-2161","price":36.44,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0606\/3325\/2057\/files\/156-2161-766x547-2.jpg?v=1758220008"},{"product_id":"toffee-caramel-stoneware-1200-1300c","title":"Toffee Caramel Stoneware 1200-1300C","description":"\u003ch2\u003eAbout\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eToffee Caramel Stoneware 164-TOFF | Recommended firing range 1200-1300C (Cone 6-11)*\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003eCaramel stoneware clay with 40% fine grog 0-0.2 mm (up to 80 Mesh). Formulated for artistic ceramics, it is ideal for throwing and modelling smooth pieces with fine details. It behaves excellently during drying and firing. Depending on the firing temperature, it develops a beautiful range of natural tones, from oatmeal beige to caramel brown, which create a warm base that is highly appreciated in ceramic decoration. Suitable for tableware (food-safe), according to ISO 6486. Supplied in a 12.5kg bag\u003c\/p\u003e\n\u003cp\u003eIndicative texture 1-2 (Smooth 1-Coarse 10).\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cem\u003eSIO2 Technical Data:\u003c\/em\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFiring range\u003cstrong\u003e: \u003c\/strong\u003e1200-1300ºC \/ Cone 6-11\u003c\/li\u003e\n\u003cli\u003eBiscuit temperature: 1000ºC \/ Cone 06\u003c\/li\u003e\n\u003cli\u003eWater content: 19%\u003c\/li\u003e\n\u003cli\u003ePlasticity (IP Atterberg): 13\u003c\/li\u003e\n\u003cli\u003eCarbonate content (CaCO3): 0%\u003c\/li\u003e\n\u003cli\u003eDrying shrinkage: 6.2%\u003c\/li\u003e\n\u003cli\u003eFiring shrinkage 1300ºC: 5.6%\u003c\/li\u003e\n\u003cli\u003ePorosity (water absorption) at 1300ºC: 0.1%\u003c\/li\u003e\n\u003cli\u003eDry bending strength: 3.5 N\/mm2\u003c\/li\u003e\n\u003cli\u003eFired bending strength 1300ºC: 50.8 N\/mm2\u003c\/li\u003e\n\u003cli\u003eThermal coefficient 1250ºC (25-500ºC): 67.6x10^-7ºC^-1\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003e(*) Firing range recommended for the clay to develop its best performance, both in terms of technical and safety characteristics, under conventional firing conditions. The colour samples may show temperatures outside the recommended range to provide a broader view, but these are pieces fired under controlled conditions.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Potclays","offers":[{"title":"Default Title","offer_id":55648018071928,"sku":"164-TOFF","price":18.49,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0606\/3325\/2057\/files\/toffee-caramel-stoneware-1200-1300c-8530.webp?v=1788430819"},{"product_id":"tkj-tom-knowles-jackson-throwing-handbuilding-body","title":"TKJ (Tom Knowles Jackson) Throwing \u0026 Handbuilding Body","description":"\u003cp\u003e\u003cstrong\u003eTKJ Throwing \u0026amp; Handbuilding Body\u003c\/strong\u003e 152-TKJ\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRecommended firing range 1200-1300C \/ Cone 6 to 11\u003c\/li\u003e\n\u003cli\u003eIndicative texture 4 (Smooth 1-Coarse 10)\u003c\/li\u003e\n\u003cli\u003eIndicative % Total Contraction @ 1200C 10%*\u003c\/li\u003e\n\u003cli\u003eA versatile clay for use on the wheel and in hand-building\u003c\/li\u003e\n\u003cli\u003eDeveloped in collaboration with Tom Knowles Jackson with properties specifically suited to throwing on a momentum wheel.\u003c\/li\u003e\n\u003cli\u003eThe clay is responsive to work with on a slow moving wheel yet retains the plasticity necessary for full bellied forms and larger vessels and has excellent green strength.\u003c\/li\u003e\n\u003cli\u003eFires to a gentle warm brown in reduction and a golden buff in oxidation.\u003c\/li\u003e\n\u003cli\u003eContains 8% of BS Mesh -30's grog\/sand.\u003c\/li\u003e\n\u003cli\u003eStandard full bag size 12.5Kg\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003e\"I wanted to find a clay that would give me beautiful body colour and texture in reduction as much of my work retains unglazed surfaces. As I throw all of my work on a McMeekin momentum wheel I needed to use a clay that was softer then most throwing bodies yet had the strength to stand up and take full bodied forms. I initially developed a recipe from a blend of Potclays' commercial bodies - Staffordshire Stoneware for plasticity, Craft Crank for iron content and texture (in the grog content) and Reduction St Thomas for its throwing qualities and sand. This clay is a reworked recipe inspired by that initial blend to offer all of those qualities.\"\u003c\/em\u003e \u003cstrong\u003eTom Knowles Jackson\u003c\/strong\u003e\u003c\/p\u003e","brand":"Potclays","offers":[{"title":"Default Title","offer_id":55660599607672,"sku":null,"price":21.99,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0606\/3325\/2057\/files\/tkj-tom-knowles-jackson-throwing-handbuilding-body-7469.webp?v=1789393023"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0606\/3325\/2057\/collections\/492x492-mugs.jpg?v=1750073899","url":"https:\/\/www.kettlespotterysupplies.com\/collections\/potclays.oembed?page=3","provider":"Kettles Pottery Supplies","version":"1.0","type":"link"}