C/6 Quintessence ash glaze

Custer feldspar 5
Lithium carbonate 1
Ash Berhens 19
Zinc oxide 19
EPK 16
Kaolin (Calc.) 14
Silica 24
Total 99

Na2O 0.01 Al2O3 0.34 SiO2 1.80
K2O 0.03 P2O5 0.03
MgO 0.02 TiO2 0.01
CaO 0.36 Fe2O3 0.01 Li2O 0.03
ZnO 0.54

Alumina:Silica ratio is 1.00:5.36
Neutral:Acid ratio is 1.00:5.49
Alk:Neut:Acid ratio is 1.00:0.34:1.85

Expansion: 68.4 x 10e-7 per degree C
Oxides causing abnormal expansion: Li2O