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samedi 8 octobre 2011

Cone 4 Satinée/Brillante

Gerstley borate 22
Frit 3134 22
EPK 10
Kaolin (Calc.) 8
Silica 38
Total 100

Na2O 0.22 Al2O3 0.29 SiO2 4.09
K2O 0.01 B2O3 0.68 P2O5 0.00
MgO 0.08 TiO2 0.00
CaO 0.69 Fe2O3 0.01

Alumina:Silica ratio is 1.00:14.00
Neutral:Acid ratio is 1.00:4.21
Alk:Neut:Acid ratio is 1.00:0.97:4.10

Expansion: 61.6 x 10e-7 per degree C
Oxides causing abnormal expansion: B2O3

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