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  1. I will be studying/testing stoneware clay body limits shortly: next month or so. Input from stoneware users would be most appreciated. I not only need formula limits, links to recipes, or you can PM them: but also properties you find beneficial or undesirable. From the research I have done so far on c10 bodies; the general range I am seeing ( in molar) Alkali 2.5 to 2.75% Total Flux 3.6 to 4.0 Alumina 19-20 SiO2 70-75 (would assume c6 is 10% higher in flux) I did not list iron (Fe) or magnesium (MgO) ; which can vary widely pending on the clay used in formulation. Stoneware can be groged or not: what % do you find most beneficial? Light. med. or heavy. Do you think mullite grog works better than sand? How important is color? iron red, deep orange, tan to brown range...etc? Is light speckling more attractive than heavy speckling? Nerd
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