Cone 6
Breaks iron red / dark gray.

26.0 – Frit 3134

22.0 – Custer Feldspar

5.0 – Talc

4.0 Whiting

17.0 EPK

26.0 Silica

100 – Total

Then Add:

1.0 Cobalt Carbonate

0.75 – Copper Carbonate

3.0 Red Iron Oxide

6.0 Rutille