{"product_id":"optikast-kaolin-for-slip-casting-bodies-rmoptik50","title":"optiKasT Kaolin for Slip Casting (Velvacast Substitute)","description":"\u003cdiv class=\"rm-testing-statement\" style=\"border:2px solid #8a5a00;border-radius:6px;padding:12px 16px;margin:16px 0;background:#fdf6e3;\"\u003e\u003cp style=\"margin:0;\"\u003e\u003cstrong\u003eYou must test before you use it, at any scale.\u003c\/strong\u003e Raw materials, mined or man-made, are not consistent. Color, strength, particle size and chemistry can change from one bag to the next and from one supplier to another, even when the name on the bag stays the same. Before you use this material in a glaze, slip or clay body of any size, mix a small test batch, fire it on your own clay in your own kiln, and check the results.\u003c\/p\u003e\u003c\/div\u003e\n\u003cspan\u003e\u003c\/span\u003e\n\u003ch2 class=\"abz-seo-product\"\u003eoptiKasT Kaolin for Slip Casting Bodies : Substitute for Velvacast\u003c\/h2\u003e\n\u003cp\u003eoptiKasT is a coarse-grained kaolin used primarily in ceramic casting applications. It has a very fast cast and exceptional deflocculation characteristics. optiKasT is preferred in pressure casting systems where a faster cast rate is desired.\u003c\/p\u003e\n\u003cp\u003eK A OLIN \u003cbr\u003eoptiKasT TM \u003cbr\u003eoptiKasT is a coarse-grained kaolin used primarily in ceramic casting applications. It has a very fast cast and exceptional deflocculation characteristics. optiKasT is preferred in pressure casting systems where a faster cast rate is desired. \u003cbr\u003eTYPICAL PROPERTIES \u003cbr\u003eCHEMICAL ANALYSIS \u003cbr\u003eSiO2 (%) 45.2 \u003cbr\u003eAl2O3 (%) 38.7 \u003cbr\u003eFe2O3 (%) 0.5 \u003cbr\u003eTiO2 (%) 1.6 \u003cbr\u003eK2O (%) 0.1 \u003cbr\u003eNa2O (%) 0.1 \u003cbr\u003eCaO (%) 0.1 \u003cbr\u003eMgO (%) Trace \u003cbr\u003eL.O.I. (%) 13.6 \u003cbr\u003eCarbon (%) 0.03 \u003cbr\u003eSulfur (%) 0.04 \u003cbr\u003ePHYSICAL PROPERTIES \u003cbr\u003epH 5.7 \u003cbr\u003eM.B.I. (meq\/100g) 2.4 \u003cbr\u003eSpecific Surface Area (sq-m\/g) 11.0 \u003cbr\u003eDry M.O.R.* (psi) 225 \u003cbr\u003ePARTICLE SIZE \u003cbr\u003e+325 Mesh (% retained) 6.0 \u003cbr\u003e%\u0026lt; 20 (microns) 94 \u003cbr\u003e%\u0026lt; 10 (microns) 85 \u003cbr\u003e%\u0026lt; 5 (microns) 74 \u003cbr\u003e%\u0026lt; 2 (microns) 55 \u003cbr\u003e%\u0026lt; 1 (microns) 37 \u003cbr\u003e%\u0026lt; 0.5 (microns) 18 \u003cbr\u003e*Extruded 50\/50 Clay\/Flint \u003cbr\u003e\u003c\/p\u003e","brand":"Sheffield Pottery","offers":[{"title":"5 Pounds","offer_id":67286244688243,"sku":"RMOPTIK-5","price":7.5,"currency_code":"USD","in_stock":true},{"title":"10 Pounds","offer_id":67286244721011,"sku":"RMOPTIK","price":14.0,"currency_code":"USD","in_stock":true},{"title":"25 Pounds","offer_id":67286244753779,"sku":"RMOPTIK-25","price":32.5,"currency_code":"USD","in_stock":true},{"title":"50 Pounds","offer_id":45113739673922,"sku":"RMOPTIK50","price":32.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/5508\/2050\/files\/Opticast_Kaolin_50lb_a4ea34cb-9bb8-4eab-ae83-f1f6ff782231.jpg?v=1791876722","url":"https:\/\/www.sheffield-pottery.live\/products\/optikast-kaolin-for-slip-casting-bodies-rmoptik50","provider":"Sheffield Pottery Inc.","version":"1.0","type":"link"}