Cone 4 #8 Transparente Glacée

Gerstley borate 16
Frit 3134 16
Silica 30
Custer feldspar 20
Talc 14
EPK 4
Total 100

Bentonite 2

Na2O 0.15 Al2O3 0.16 SiO2 3.16
K2O 0.07 B2O3 0.36 P2O5 0.00
MgO 0.36 TiO2 0.00
CaO 0.43 Fe2O3 0.00
MnO 0.00

Alumina:Silica ratio is 1.00:19.44
Neutral:Acid ratio is 1.00:6.08
Alk:Neut:Acid ratio is 1.00:0.52:3.16

Expansion: 63.5 x 10e-7 per degree C
Oxides causing abnormal expansion: B2O3