Ingredients

Ingredient Amount
Gerstley Borate 13.40
Dolomite 5.90
Whiting 8.30
Zinc Oxide 4.00
F-4 Feldspar 46.20
EPK Kaolin 2.40
Silica 19.80
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Black Copper Oxide 4.00

Instructions

Published in "Copper Oxide" by John Britt, in the Jun 2012 issue of Ceramics Monthly.