C/04 Textured Ash Glaze Base #19

Nepheline syenite 45
Dolomite 11
Ash Berhens 10
Zinc oxide 3
Frit 3134 17
Gerstley borate 14

Na2O 0.23 Al2O3 0.23 SiO2 1.26
K2O 0.05 B2O3 0.22 P2O5 0.01
MgO 0.15 TiO2 0.00
CaO 0.50 Fe2O3 0.00
ZnO 0.07

Alumina:Silica ratio is 1.00:5.56
Neutral:Acid ratio is 1.00:2.84
Alk:Neut:Acid ratio is 1.00:0.45:1.27

Expansion: 95.4 x 10e-7 per degree C
Oxides causing abnormal expansion: B2O3