Bass #27 Transparent

Silica 21
Frit 3134 48
EPK 5
Kona F-4 15
Talc 6
Whiting 5
Total 100

Na2O 0.25 Al2O3 0.12 SiO2 2.55
K2O 0.02 B2O3 0.41 P2O5 0.00
MgO 0.12 TiO2 0.00
CaO 0.61 Fe2O3 0.00
MnO 0.00

Alumina:Silica ratio is 1.00:20.66
Neutral:Acid ratio is 1.00:4.75
Alk:Neut:Acid ratio is 1.00:0.54:2.55

Expansion: 75.6 x 10e-7 per degree C
Oxides causing abnormal expansion: B2O3