Potash feldspar, sodium feldspar, ball clay, pottery stone, fused magnetite, dead burn magnetite, zirconium silicate.
Water washed kaolin, calcined kaolin, ball clay, feldspar, sodium bentonite, pottery stone, nepheline, diopside.
Zro2: 64.0%min Hfo2: 1.3+-0.5% Al2o2: 1.1+-0.1% Fe2o3: 0.08% max Tio2: 0.1% max Sio2: 33.5% max Size: d50 =< 1.5um ( 5 microns guarantee). 25kg standard packing