Ingredient Amount
Whiting 29.00
Custer Feldspar (sub. Forshammer) 40.00
Spodumene 4.00
EPK Kaolin 27.00
Add Amount
Red Iron Oxide 5.00


Specific gravity: 1.43. A calcium matte with a hard and flat surface. The color tests showed a neutral color response; however, the red iron oxide showed some variegation with yellows on a rust ground. I substituted Forshammer feldspar for Custer feldspar.

From Pottery Making Illustrated.

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