Dewitt Gimblet on wed 18 nov 98
I was planning on trying the high expansion raku crackle glaze that Tom
Buck suggested a month or two back, but my local supplier doesn't carry
Ferro 3191. They do however carry Ferro 3269 which they describe as a
crackle frit. I've never developed a glaze recipe before, but thought I'd
give it a try with GlazeChem. Any comments before I mix some up and fire it?
thanks,
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Using GlazeChem, Tom's original recipe is:
Frit 3191 80.00
EPK 20.00
--------
100.00
Na2O 0.50 Al2O3 0.24 SiO2 2.48
CaO 0.50 B2O3 1.00
Mine is:
Frit 3269 65.00
Gerstley borate 30.00
Silica 325 Mesh 5.00
--------
100.00
plus Zircopax 10.00
Na2O 0.36 Al2O3 0.26 SiO2 2.06
K2O 0.17 B2O3 1.10 ZrO2 0.17
CaO 0.45
ZnO 0.02
thanks,
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