Cone 9 Crystal Red

Barium carbonate 40
Zinc oxide (Calc.) 15
Nepheline syenite 35
Kaolin (Calc.) 5
Silica 5
Total 100

Black nickel oxide 1.5

Na2O 0.12 Al2O3 0.20 SiO2 0.97
K2O 0.04 P2O5 0.00
MgO 0.00 TiO2 0.00
CaO 0.00 Fe2O3 0.00
NiO 0.04
ZnO 0.38
BaO 0.42

Alumina:Silica ratio is 1.00:4.76
Neutral:Acid ratio is 1.00:4.77
Alk:Neut:Acid ratio is 1.00:0.20:0.98

Expansion: 101.2 x 10e-7 per degree C