Breaks iron red / dark gray.
26.0 – Frit 313422.0 – Custer Feldspar5.0 – Talc4.0 Whiting17.0 EPK26.0 Silica100 – TotalThen Add:1.0 Cobalt Carbonate0.75 – Copper Carbonate3.0 Red Iron Oxide6.0 Rutille