Cone 4 Satinée/Brillante

Gerstley borate 25
Frit 3134 25
EPK 16
Silica 34
Total 100

Bentonite 1

Na2O 0.22 Al2O3 0.23 SiO2 3.41
K2O 0.00 B2O3 0.68 P2O5 0.00
MgO 0.08 TiO2 0.00
CaO 0.69 Fe2O3 0.01

Alumina:Silica ratio is 1.00:14.72
Neutral:Acid ratio is 1.00:3.73
Alk:Neut:Acid ratio is 1.00:0.92:3.42

Expansion: 64.7 x 10e-7 per degree C
Oxides causing abnormal expansion: B2O3

Cone 4 Quintessence

EPK 20
Kaolin (Calc.) 20
Frit 3134 60
Total 100

Bentonite 2

Na2O 0.31 Al2O3 0.47 SiO2 2.46
K2O 0.00 B2O3 0.62 P2O5 0.00
MgO 0.01 TiO2 0.01
CaO 0.68 Fe2O3 0.01

Alumina:Silica ratio is 1.00:5.23
Neutral:Acid ratio is 1.00:2.28
Alk:Neut:Acid ratio is 1.00:1.09:2.47

Expansion: 77.4 x 10e-7 per degree C
Oxides causing abnormal expansion: B2O3