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Is that on stoneware? Looks great.
Michael,Actually, it is on a Helmer Body I got from the Helmer Clay Co. in the mail.John Brittwww.johnbrittpottery.com/wks.htm
So it's a porcelain-white stoneware -light clay. Have you used it inside a dish? I'll do some tests in my next kiln.
Michael,Helmar is a kaolin and I have not tested the glaze for copper release, but would probably reduce the amount of coppper as it is in the oxide form which is about 1.4 times a strong as the carbonate form. 5% is usually the limit before it starts releasing a lot of copper. But I would test it before using it on functional surfaces. Of course, you know that from using Willie Hillux!?John Brittwww.johnbrittpottery.com/wks.htm
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