{"title":"Grogs","description":"\u003cp class=\"MsoNormal\"\u003e\u003cspan style=\"font-family: 'Calibri',sans-serif;\"\u003eGrogs for adding to clay bodies. Grog is a type of clay which has been fired then ground up which is then added to clay before use, to add texture, help reduce shrinkage and aid in even drying.\u003c\/span\u003e\u003c\/p\u003e","products":[{"product_id":"potterycrafts-flint-silica-sand","title":"Potterycrafts Flint Silica Sand","description":"\u003cp\u003eFlint ( SiO2 ). Used in glazes and in bodies as a source of calcined silica. Flint is a major source of silica in all types of clay body (15%). It increases firing temperature and reduces plasticity and shrinkage.\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"POTTERYCRAFTS","offers":[{"title":"5","offer_id":49197100761370,"sku":"P3319-05","price":10.92,"currency_code":"GBP","in_stock":true},{"title":"25","offer_id":49197100794138,"sku":"P3319-25","price":41.2,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0865\/4399\/1066\/files\/Potterycrafts-Flint-Silica-Sand_d9ee1a4c-52c0-482b-a9d1-13e19b33bc9a.jpg?v=1721980747"},{"product_id":"potterycrafts-quartz-silica-sand","title":"Potterycrafts Quartz Silica Sand","description":"\u003cp\u003eQuartz ( SiO2). Fine ground Silica Sand for use in bodies and glazes. When added to a body, they help glaze fit and make the body more refractory.\u003c\/p\u003e","brand":"POTTERYCRAFTS","offers":[{"title":"5","offer_id":49197100826906,"sku":"P3337-05","price":10.88,"currency_code":"GBP","in_stock":true},{"title":"25","offer_id":49197100859674,"sku":"P3337-25","price":36.05,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0865\/4399\/1066\/files\/Potterycrafts-Quartz-Silica-Sand_ba060397-5ba7-4c6c-abaf-5d9f58849371.jpg?v=1721981168"},{"product_id":"potterycrafts-standard-boroate-ferro-silicate-frit","title":"Potterycrafts Standard Boroate Ferro Silicate Frit","description":"\u003cp\u003eThis is Ferro frit is high in calcium which means it will change the shade of browns and Iron oxide colours. In general, it will reduce the brightness of these stains and oxides. Ferro Frit 3124. This borosilicate frit is high in calcium.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eTechnical Information:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eLinear Thermal Expansion: 7.9x10-6\/°C.\u003c\/li\u003e\n\u003cli\u003eFiring Range: 1000 - 1020°C\u003c\/li\u003e\n\u003cli\u003eSiO2: 55.3%\u003c\/li\u003e\n\u003cli\u003eB2O3: 13.7%\u003c\/li\u003e\n\u003cli\u003eAl2O3: 9.9%\u003c\/li\u003e\n\u003cli\u003eNa2O: 6.3%\u003c\/li\u003e\n\u003cli\u003eK2O: 0.7%\u003c\/li\u003e\n\u003cli\u003eCaO: 14.1%\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"POTTERYCRAFTS","offers":[{"title":"1","offer_id":49197106463002,"sku":"P3124-01","price":8.85,"currency_code":"GBP","in_stock":true},{"title":"5","offer_id":49197106495770,"sku":"P3124-05","price":40.28,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0865\/4399\/1066\/files\/Potterycrafts-Standard-Boroate-Ferro-Silicate-Frit_8614f896-15ca-4eae-b2d0-4b8411a98931.jpg?v=1721147726"},{"product_id":"imerys-200-grit-very-fine-molochite","title":"Potterycrafts 200 Grit Very Fine Molochite","description":"\u003cp\u003eMolochite Very Fine (-200s) Cornish sourced. A high temperature calcined kaolin used to raise maturing temperature of glazes. Reduces crawling tendency in glazes which have a high clay content.\u003c\/p\u003e\u003cp\u003e\u003cbr\u003eManufactured by calcining China clay which to produce a refractory white grog. Fine grades are used to reduce shrinkage of engobes and to increase resistance to thermal shock. Coarser grades are used in clay bodies. Grogs add texture, along with bite, for better control during forming. The grog also acts as an opener and helps the clay to dry uniformly. As the grog is already fired it also cuts down on the overall shrinkage thus reducing problems of cracking and warping. Most grogs have been fired to high temperatures of at least 1300°C.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e37% Al2O3\u003c\/li\u003e\n\u003cli\u003e48% SiO2\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"IMERYS","offers":[{"title":"1","offer_id":49197114786074,"sku":"P3310-01","price":5.34,"currency_code":"GBP","in_stock":true},{"title":"5","offer_id":49197114851610,"sku":"P3310-05","price":16.1,"currency_code":"GBP","in_stock":true},{"title":"25","offer_id":49197114949914,"sku":"P3310-25","price":43.62,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0865\/4399\/1066\/files\/Imerys-200-Grit-Very-Fine-Molochite.jpg?v=1721998762"},{"product_id":"imerys-120-grit-fine-molochite","title":"Potterycrafts 120 Grit Fine Molochite","description":"\u003cp\u003eMolochite Fine (-120s) Cornish sourced. Manufactured by calcining China clay which to produce a refractory white grog.\u003cbr\u003e\u003c!--[if !supportLineBreakNewLine]--\u003e\u003c\/p\u003e\u003cp\u003eFine grades are used to reduce shrinkage of engobes and to increase resistance to thermal shock.\u003cbr\u003eCoarser grades are used in clay bodies. Grogs add texture, along with bite, for better control during forming. The grog also acts as an opener and helps the clay to dry uniformly. As the grog is already fired it also cuts down on the overall shrinkage thus reducing problems of cracking and warping. Most grogs have been fired to high temperatures of at least 1300°C.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e37% Al2O3\u003c\/li\u003e\n\u003cli\u003e48% SiO2\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"IMERYS","offers":[{"title":"1","offer_id":49197115113754,"sku":"P3389-01","price":4.4,"currency_code":"GBP","in_stock":true},{"title":"5","offer_id":49197115146522,"sku":"P3389-05","price":19.45,"currency_code":"GBP","in_stock":true},{"title":"25","offer_id":49197115179290,"sku":"P3389-25","price":68.96,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0865\/4399\/1066\/files\/Imerys-120-Grit-Fine-Molochite_fd622e86-c16e-496a-8276-343c8e3bce80.jpg?v=1740040139"},{"product_id":"imerys-30-grit-coarse-molochite","title":"Potterycrafts 30 Grit Coarse Molochite","description":"\u003cp\u003eMolochite Coarse (-30's) Cornish sourced - coarse and best suited as an addition to Raku and modelling bodies to introduce a more open texture.\u003c\/p\u003e\u003cp\u003eManufactured by calcining China clay which is a refractory white grog. Fine grades are used to reduce shrinkage of engobes and to increase resistance to thermal shock.\u003c\/p\u003e\u003cp\u003eCoarser grades are used in clay bodies. Grogs add texture, along with bite, for better control during forming. The grog also acts as an opener and helps the clay to dry uniformly. As the grog is already fired it also cuts down on the overall shrinkage thus reducing problems of cracking and warping. Most grogs have been fired to high temperatures of at least 1300°C.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e37% Al2O3\u003c\/li\u003e\n\u003cli\u003e48% SiO2\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"IMERYS","offers":[{"title":"1","offer_id":49197115244826,"sku":"P3360-01","price":4.87,"currency_code":"GBP","in_stock":true},{"title":"5","offer_id":49197115310362,"sku":"P3360-05","price":9.27,"currency_code":"GBP","in_stock":true},{"title":"25","offer_id":49197115375898,"sku":"P3360-25","price":40.83,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0865\/4399\/1066\/files\/Imerys-30-Grit-Coarse-Molochite.jpg?v=1722002514"},{"product_id":"imerys-16-30-grit-very-coarse-molochite","title":"Potterycrafts 16-30 Grit Very Coarse Molochite","description":"\u003cp\u003eMolochite Very Coarse (16's-30's) Cornish sourced - coarser than P3358 and best suited as an addition to Raku and modelling bodies to introduce a more open texture.\u003c\/p\u003e\u003cp\u003eManufactured by calcining China clay which is a refractory white grog. Fine grades are used to reduce shrinkage of engobes and to increase resistance to thermal shock.\u003c\/p\u003e\u003cp\u003eCoarser grades are used in clay bodies. Grogs add texture, along with bite, for better control during forming. The grog also acts as an opener and helps the clay to dry uniformly. As the grog is already fired it also cuts down on the overall shrinkage thus reducing problems of cracking and warping. Most grogs have been fired to high temperatures of at least 1300°C.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e37% Al2O3\u003c\/li\u003e\n\u003cli\u003e48% SiO2\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"IMERYS","offers":[{"title":"1","offer_id":49197115441434,"sku":"P3359-01","price":4.87,"currency_code":"GBP","in_stock":true},{"title":"5","offer_id":49197115474202,"sku":"P3359-05","price":7.65,"currency_code":"GBP","in_stock":true},{"title":"25","offer_id":49197115506970,"sku":"P3359-25","price":32.49,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0865\/4399\/1066\/files\/Imerys-16-30-Grit-Very-Coarse-Molochite.jpg?v=1722002861"},{"product_id":"vibrantz-minerals-silica-sand","title":"Vibrantz Minerals Silica Sand","description":"\u003cp\u003eSilica Sand Grogs is added to a body, they help glaze fit and make the body more refractory.\u003cbr\u003e\u003cbr\u003eGrog (ground, fired body) is added to some clays to provide a proportion of fired and often refractory material to the body. This adds texture, along with bite, for better control during forming. The grog also acts as an opener and helps the clay to dry uniformly. As the grog is already fired it also cuts down on the overall shrinkage thus reducing problems of cracking and warping. Most are fired to high temperatures of at least 1300ºC.\u003c\/p\u003e","brand":"VIBRANTZ","offers":[{"title":"5","offer_id":49197115736346,"sku":"P3387-05","price":7.04,"currency_code":"GBP","in_stock":true},{"title":"25","offer_id":49197115801882,"sku":"P3387-25","price":21.61,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0865\/4399\/1066\/files\/Vibrantz-Minerals-Silica-Sand.jpg?v=1727743845"},{"product_id":"potterycrafts-75-sodium-silicate","title":"Potterycrafts 75 Sodium Silicate","description":"\u003cp\u003eSodium Silicate 75 is a deflocculant used in the preparation of casting slips (\u0026gt;0.3%). Note the Volume (ml) can be converted to weights (g) by multiplying by 1.3. Typically used in bone China slip.\u003c\/p\u003e\u003cul\u003e\u003cli\u003eNa2 SiO2\u003c\/li\u003e\u003c\/ul\u003e","brand":"POTTERYCRAFTS","offers":[{"title":"1","offer_id":49197121536282,"sku":"P3343-01","price":6.29,"currency_code":"GBP","in_stock":true},{"title":"5","offer_id":49778525896986,"sku":"P3343-05","price":21.63,"currency_code":"GBP","in_stock":true},{"title":"25","offer_id":49778530058522,"sku":"P3343-25","price":82.9,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0865\/4399\/1066\/files\/Potterycrafts-75-Sodium-Silicate-Liquid.jpg?v=1775737102"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0865\/4399\/1066\/collections\/Groggs.jpg?v=1726497954","url":"https:\/\/potterycrafts.live\/collections\/grogs.oembed","provider":"Potterycrafts","version":"1.0","type":"link"}