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Ingredients

Ingredient Amount
Barium Carbonate 12.60
Magnesium Carbonate 2.60
Whiting 9.20
Nepheline Syenite 41.10
EPK Kaolin 8.90
Silica 25.60
Add Amount
Zinc Oxide 3.90

Instructions


Specific gravity: 1.43. The surface of this glaze lives up to its name as a smooth and stony matte. The color response is not as vivid as it would perhaps be without the added magnesium carbonate. With cobalt carbonate, it is in the lilac range and with copper carbonate, it is a pale green. This glaze is not food safe. For color variations, omit the zinc oxide.

Original recipe shared by Rick Malmgren in the February 1980 issue of Ceramics Monthly.

This recipe was shared by Alisa Clausen in the February 2020 issue of Ceramics Monthly.

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