Colemanite Glaze #6 Gloss/Transparent

Ball clay 51
Colemanite 49
Total 100

Na2O 0.01 Al2O3 0.55 SiO2 1.98
K2O 0.02 B2O3 1.40 TiO2 0.04
MgO 0.02 Fe2O3 0.02
CaO 0.95

Alumina:Silica ratio is 1.00:3.58
Neutral:Acid ratio is 1.00:1.04
Alk:Neut:Acid ratio is 1.00:1.95:2.03

Expansion: 60.4 x 10e-7 per degree C
Oxides causing abnormal expansion: B2O3