C/6 Quintessence ash glaze

Ash Berhens 42
Custer feldspar 21
EPK 21
Frit 3134 8
Frit 3110 8
Total 100

Na2O 0.10 Al2O3 0.34 SiO2 1.50
K2O 0.08 B2O3 0.06 P2O5 0.05
MgO 0.04 TiO2 0.01
CaO 0.78 Fe2O3 0.01

Alumina:Silica ratio is 1.00:4.48
Neutral:Acid ratio is 1.00:3.99
Alk:Neut:Acid ratio is 1.00:0.40:1.58

Expansion: 89.6 x 10e-7 per degree C
Oxides causing abnormal expansion: B2O3