Cone 4 #32 Opaque/Satinée

Custer feldspar 48
Zinc oxide (Calc.) 11
Whiting 20
EPK 15
Silica 6
Total 100

Na2O 0.05 Al2O3 0.33 SiO2 1.85
K2O 0.13 P2O5 0.00
MgO 0.00 TiO2 0.00
CaO 0.49 Fe2O3 0.00
ZnO 0.33

Alumina:Silica ratio 1.00:5.59
Neutral:Acid ratio is 1.00:5.60
Alk:Neut:Acid ratio is 1.00:0.33:1.86

Expansion: 83.6 x 10e-7 per degree C