Bass #62 Bristol/Quintessence

Silica 20
Frit 3134 11
EPK 10
Kaolin (Clac.) 9
Custer feldspar 20
Whiting 10
Zinc oxide (Calc.) 20
Total 100

Na2O 0.06 Al2O3 0.24 SiO2 1.81
K2O 0.05 B2O3 0.08 P2O5 0.00
MgO 0.00 TiO2 0.00
CaO 0.32 Fe2O3 0.00
ZnO 0.56

Alumina:Silica ratio is 1.00:7.61
Neutral:Acid ratio is 1.00:5.65
Alk:Neut:Acid ratio is 1.00:0.32:1.82

Expansion: 74.0 x 10e-7 per degree C
Oxides causing abnormal expansion: B2O3