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Ingredients

Ingredient Amount
Gerstley Borate 5.00
Whiting 20.00
Nepheline Syenite 35.00
EPK Kaolin 15.00
Silica 25.00
Add Amount
Cobalt Carbonate 0.25
Copper Carbonate 0.50

Instructions

Published in "LSU Cone 10 Glazes" in the Sep 2015 issue of Ceramics Monthly.

Transparent, glossy purple glaze. Must be reduced to achieve purple color. In oxidation or neutral atmospheres the result will be a blue glaze. In the image shown, the glaze appears on a porcelain test tile fired to cone 10 in a reduction atmosphere.
Mix all ingredients prior to adding the water.