Kentucky OM #4 30
EPK 10
Custer feldspar 28
Silica 25
QIT Red Dust 7
Bentonite 2
Na2O 1.0% Al2O3 18.0% SiO2 69.5%
K2O 3.3% P2O5 0.0%
MgO 0.3% TiO2 0.4%
CaO 0.7% Fe2O3 6.7%
ZnO 0.1%
Volatiles: CO2 0.1%
Other 5.4%
Loss On Ignition: 5.2%
Note : Perfect plasticity.
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