Pamela 0 Posted September 14, 2011 Report Share Posted September 14, 2011 I have a glaze recipe I haven't used in about 40 years. It contains 52% feldspar and the firing temperature given is 1250. My current kiln only fires to 1000 so can I substitute borax for the feldspar to lower the ffiring temperature? Thanks for any help you can give me. Link to post Share on other sites
Matt Katz 15 Posted September 15, 2011 Report Share Posted September 15, 2011 I have a glaze recipe I haven't used in about 40 years. It contains 52% feldspar and the firing temperature given is 1250. My current kiln only fires to 1000 so can I substitute borax for the feldspar to lower the ffiring temperature? Thanks for any help you can give me. No, The substitution is more complicated than that. I would have to say that you need to look for a new batch of formulas. Your old formula is basically ^6 and you kiln is fining under ^04. Link to post Share on other sites
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