C/6 Quintessence ash glaze

Nepheline syenite 30
Ash Berhens 30
Frit 3134 20
Ball clay 10
Silica 10.
Total 100
Bentomite 2

Na2O 0.20 Al2O3 0.30 SiO2 1.92
K2O 0.06 B2O3 0.15 P2O5 0.04
MgO 0.04 TiO2 0.01
CaO 0.71 Fe2O3 0.01

Alumina:Silica ratio is 1.00:6.46
Neutral:Acid ratio is 1.00:4.46
Alk:Neut:Acid ratio is 1.00:0.44:1.98

Expansion: 87.5 x 10e-7 per degree C
Oxides causing abnormal expansion: B2O3