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Ingredients

Ingredient Amount
Gerstley Borate 1.00
Mason Stain 6600 (Best Black) 2.00

Instructions


Measurements in teaspoons.

This underglaze is very versatile. I have used it at cone 04 in oxidation and cone 12 in reduction. However, it works best for wood firing between cone 10–12 in reduction. I blunge this mixture with an immersion blender with water to the desired thickness for my brushwork. If directly hit with fly ash in the wood kiln, it can turn blue.

This recipe was shared by Scott McClellan in the October 2019 issue of Ceramics Monthly.

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