Ingredient Amount
Nepheline Syenite 31.25
Alberta Slip Clay 68.75
Add Amount
Cobalt Oxide 3.54


I layer this black underglaze under Seafoam Green glaze, but it is a great black all by itself. Fire to cone 10 in reduction in a gas kiln. 

This recipe was shared by Mark Cortright in the October 2021 issue of Ceramics Monthly.