Cone 4 #18 Satinée/Brillante

Custer feldspar 34
Strontium carbonate 10
Whiting 6
Zinc oxide (Calc.) 10
EPK 11
Silica 29
Total 100

Na2O 0.05 Al2O3 0.32 SiO2 3.12
K2O 0.12 P2O5 0.00
MgO 0.00 TiO2 0.00
CaO 0.20 Fe2O3 0.00
ZnO 0.40
SrO 0.22

Alumina:Silica ratio is 1.00:9.72
Neutral:Acid ratio is 1.00:9.73
Alk:Neut:Acid ratio is 1.00:0.32:3.13

Expansion: 73.3 x 10e-7 per degree C
Oxides causing abnormal expansion: SrO