Bass #30 Quintessence

Barium carbonate 8
Dolomite 2
Custer feldspar 77
Whiting 2
Zinc oxide 11
Total 100

Bentonite 4

Na2O 0.11 Al2O3 0.40 SiO2 2.65
K2O 0.24 TiO2 0.00
MgO 0.04 Fe2O3 0.00
CaO 0.11
ZnO 0.39
BaO 0.12

Alumina:Silica ratio is 1.00:6.70
Neutral:Acid ratio is 1.00:6.71
Alk:Neut:Acid ratio is 1.00:0.40:2.66

Expansion: 85.6 x 10e-7 per degree C