Ellen Baker on tue 18 feb 97
These two reliable greens (using an identical base) have a wide fit range.
I've never had either one craze. The turquoise is a more bluish teal than
the forest -- both will produce predictable results in various
oxidation/reduction atmospheres, and can tolerate Cone 9-11. (I'd love to
know if these have ever been used successfully at lower temps, like Cone
7-8!)
Recipe weights are given in 10,000 gm batch recipe format and by gross wt.
percentage. INSIGHT calcs are identical for both: Ratio 11.44, Expan.
6.44, Wt. 292.91.
Waxy Turquoise Green - Cone 10 Reduc. or Oxid.
Flint 2000 19.8%
Custer Feldspar 4100 40.59%
EPK (kaolin) 500 4.95%
Talc 1500 14.85%
Gerstley Borate 1200 11.88%
Dolomite 700 6.93%
Chrome Oxide 50 .5%
Cobalt Oxide 50 .5%
Waxy Forest Green - Cone 10 Reduc. or Oxid.
Flint 2000 19.05%
Custer Feldspar 4100 39.05%
EPK (kaolin) 500 4.76%
Talc 1500 14.29%
Gerstley Borate 1200 11.43%
Dolomite 700 6.67%
Chrome Oxide 400 3.81%
Cobalt Carbonate 100 .95%
Both of these will be somewhat "brighter" on white clays. The turquoise
picks up more iron spotting from buff and red clays than the forest green
does.
This waxy glaze recipe is not a runny, drippy glaze. If mixed to a heavy
cream consistency, we find that a "five second dip" for bisqued mugs, etc.
leaves just the right coat thickness.
Comments, questions: e-mail me directly at orion@telcomplus.com.
Ellen Baker - Glacier, WA
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