Bass #61 Bristol/Quintessence

Silica 19
EPK 10
Kaolin (Calc.) 8
Custer feldspar 30
Whiting 14
Zinc oxide (Calc.) 19
Total 100

Na2O 0.03 Al2O3 0.28 SiO2 1.88
K2O 0.08 P2O5 0.00
MgO 0.00 TiO2 0.00
CaO 0.34 Fe2O3 0.00
ZnO 0.55

Alumina:Silica ratio is 1.00:6.65
Neutral:Acid ratio is 1.00:6.67
Alk:Neut:Acid ratio is 1.00:0.28:1.89

Expansion: 74.4 x 10e-7 per degree C