Gail Crosby Posted October 30, 2023 Report Share Posted October 30, 2023 Is there something that can be added to cone 5-6 clay that will increase its resistance to heat shock, i am using white clay for making ovenware. Quote Link to comment Share on other sites More sharing options...
Min Posted October 30, 2023 Report Share Posted October 30, 2023 (edited) Hi Gail and welcome to the Forum! In an ideal world we would use a low expansion claybody paired with a well fitting low expansion glaze for ovenware. In reality a lot of people don't do this yet still make ovenware, usually when selling the pots they add a cavet to place the filled pot in a cold oven then turn the oven on along with other advice like using it in the middle of the oven and taking the design into consideration. (even wall thickness, no pooled glazes, no sharp corners etc) To make a midrange low expansion clay manufacturers use materials like spodumene, pyrophillite and carefully control the silica. Adding these to an existing body is going to alter the maturity temp/cone of the clay. I would suggest asking your supplier which claybody they recommend for ovenware, ask the manufacturer if the supplier isn't sure. Edited October 30, 2023 by Min Hulk, PeterH and Rae Reich 3 Quote Link to comment Share on other sites More sharing options...
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