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Ingredients

Ingredient Amount
Barium Carbonate 15.60
Gerstley Borate 10.40
Wollastonite 15.60
Nepheline Syenite 39.70
Kaolin 10.40
Silica 8.30
Add Amount
Black Copper Oxide 3.10

Instructions

Published in "Electric Kiln Success" by Jonathan Kaplan, in the Jan/Feb 2008 issue of Pottery Making Illustrated.