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I have tried stretching the heating rate up to top temp (1250). I have a bunch of stuff ready for a glaze firing, and I think I will try a longer time to top-temp this time.
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I do understand about the mixtures.What I want to achieve with my studies is to better understand the properties of the substances I am using and better know if I can try similar substances and know how to identify those similar substances.
You write about maturation of the clay. The clay fires really well, as far as I can tell. It is this darned glaze that is irritating me to bits! ;-)
Thanks Bob!
Marianne