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Ingredients

Ingredient Amount
Barium Carbonate 3.89
Dolomite 5.56
Gerstley Borate 11.12
Whiting 8.34
Wood Ash (soft wood) 1.00
Zinc Oxide 1.67
Kona F-4 Feldspar 41.72
EPK Kaolin 1.67
Silica 25.03
Add Amount
Tin Oxide 0.83
Copper Oxide 0.42

Instructions

Originally published in the October 2010 issue of Ceramics Monthly.