Dolomite 8
Whiting 11
Custer feldspar 26
Kona F-4 21
Ball clay 13
Silica 21
Ultrox 8.7
Tin oxide 4.35
Copper carbonate 6.5
Na2O 0.11 Al2O3 0.36 SiO2 3.15
K2O 0.12 TiO2 0.01
MgO 0.13 Fe2O3 0.00
CaO 0.48 ZrO2 0.14
CuO 0.16 SnO2 0.09
Alumina:Silica ratio is 1.00:8.82
Neutral:Acid ratio is 1.00:9.48
Alk:Neut:Acid ratio is 1.00:0.36:3.38
Expansion: 72.0 x 10e-7 per degree C
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