266G Umbria with Grog

266G Umbria with Grog

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Gives a reduction-like dark brown color in an electric kiln. Smooth and plastic. Contains manganese and a small amount of fine grog is added. It's good for all techniques. We recommend firing to cone 5.

Cone 4 Average Shrinkage 11.0% Absorption 2.4%

Cone 6 Average Shrinkage 11.5% Absorption 1.0%