C/04 Quintessence Ash Glaze Base #3

Frit 3134 53
Custer feldspar 3
Ball clay 26
Ash Berhens 1
Gerstley borate 4

Na2O 0.22 Al2O3 0.21 SiO2 1.73
K2O 0.02 B2O3 0.44 P2O5 0.02
MgO 0.03 TiO2 0.01
CaO 0.73 Fe2O3 0.01

Alumina:Silica ratio is 1.00:8.27
Neutral:Acid ratio is 1.00:2.73
Alk:Neut:Acid ratio is 1.00:0.65:1.77

Expansion: 84.7 x 10e-7 per degree C
Oxides causing abnormal expansion: B2O3