Ingredients

Ingredient Amount
Gillespie Borate 30.00
F-4 Feldspar (sub G200 Feldspar) 46.00
EPK Kaolin 13.00
Silica 11.00
Add Amount
Copper Carbonate 1.00
Tin Oxide 10.00

Instructions


Adding 10% tin oxide makes this clear glass opaque.

This recipe was shared by Yoko Sekino-Bové in the April 2021 issue of Ceramics Monthly.