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dimanche 9 octobre 2011

Cone 4 Satinée/Brillante

Gerstley borate 26
Frit 3134 26
EPK 14
Silica 34
Total 100

Na2O 0.22 Al2O3 0.19 SiO2 3.25
K2O 0.00 B2O3 0.69 P2O5 0.00
MgO 0.08 TiO2 0.00
CaO 0.69 Fe2O3 0.00

Alumina:Silica ratio is 1.00:16.89
Neutral:Acid ratio is 1.00:3.69
Alk:Neut:Acid ratio is 1.00:0.88:3.25

Expansion: 65.5 x 10e-7 per degree C
Oxides causing abnormal expansion: B2O3

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