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Ur-b(ball clay) Product name : ur-b(ball clay) Sio2 : 49.3% Al2o3 : 32% Fe2o3 : 1.19% Cao : 0.1% Mgo : 0.28% K2o : 1.93% Na2o : 0.34% Tio2 : 0.53% Dried mor(kgf/cm2) : 64.08 Residue on 325mesh sieve(%) : 0.3 Moisture : 18%~20% 1mt per bag