C/04 Textured Ash Glaze Base #21

Nepheline syenite 49
Dolomite 12
Ash Berhens 10
Zinc oxide 3
Gerstley borate 17
Frit 3134 9

Na2O 0.22 Al2O3 0.25 SiO2 1.24
K2O 0.06 B2O3 0.20 P2O5 0.01
MgO 0.17 TiO2 0.00
CaO 0.49 Fe2O3 0.00
ZnO 0.07

Alumina:Silica ratio is 1.00:5.01
Neutral:Acid ratio is 1.00:2.82
Alk:Neut:Acid ratio is 1.00:0.44:1.25

Expansion: 95.5 x 10e-7 per degree C
Oxides causing abnormal expansion: B2O3