Colemanite Glaze #13 Waxy/Opaque/White

Colemanite 20
Barium carbonate 6
Custer feldspar 43
Silica 24
EPK 2
Whiting 2
Zinc oxide (Calc.) 3
Total 100

Bentonite 1

Na2O 0.08 Al2O3 0.32 SiO2 3.59
K2O 0.18 B2O3 0.57 P2O5 0.00
MgO 0.00 TiO2 0.00
CaO 0.47 Fe2O3 0.00
ZnO 0.14
BaO 0.12

Alumina:Silica ratio is 1.00:11.16
Neutral:Acid ratio is 1.00:4.03
Alk:Neut:Acid ratio is 1.00:0.89:3.59

Expansion: 70.6 x 10e-7 per degree C
Oxides causing abnormal expansion: B2O3