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glaze test for persimmon glaze, cone 6, oxidation/colmanite sub.

updated sat 23 sep 00


Alisa and Claus Clausen on fri 22 sep 00

Tested on light grey, mid range stoneware.

Gerstley Borate 46,08 %
EPK 22,55
Silica 29,41
Soda Ash 1,96

Red Iron Oxide 9,80

all ingredients measured up to the next highest whole decimal.

Substitued colemanite for G.B.
Does not work.
I know it is almost 50% part of the receipe, but wanted to try it.
Glaze looks underfired, mud brown.

Best regards,
Alisa in Denmark

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