Lili Krakowski on mon 27 feb 06
Saying this up front: I do not do reduction firing, have not tested this.
From Emmanuel Cooper's wonderful "The Potter's Book of Glaze Recipes"
#138
Neph Sy. 36
Calcium borate frit
(colemanite) 7
Dolomite 10
Zinc Oxide 3
Barium Carbonate 7
Bentonite 3
Flint 34
Tin Oxide 1%
Red Iron Oxide 1%
"A clear transparent glaze in oxidation, smooth and even over a wide
temperature range. In reduction it gives a pale green on stoneward, a
delicate 'baby blue' on porcelain."
NOTE THAT THIS GLAZE USES BARIUM WHICH I WOULD REPLACE BY STRONTIUM OR
CALCIUM.
From Michael Bailey's gorgeous "Oriental Glazes" (featuring inter al some
breathtaking Marcia Selsors) there is the definition that a celadon is a
transparent or semi-transparent glaze in reduction--to which a bit of iron
has been added, or which picks up a bit of iron from the body. He adds that
iron introduced into the glaze is added as red iron oxide, or as a little
red clay...
So I would go with that...and test.
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Lili Krakowski
Be of good courage
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