Cone 9 Crimson

Dolomite 20
Whiting 6
Cornwall Stone 51
EPK 13
Kaolin (Calc.) 10
Total 100

Cobalt carbonate 1

Na2O 0.08 Al2O3 0.47 SiO2 2.25
K2O 0.07 P2O5 0.00
MgO 0.31 TiO2 0.01
CaO 0.52 Fe2O3 0.01
CoO 0.02

Alumina:Silica ratio is 1.00:4.82
Neutral:Acid ratio is 1.00:4.84
Alk:Neut:Acid ratio is 1.00:0.47:2.27

Expansion: 70.3 x 10e-7 per degree C