325 Mesh Clay Exquisite particle size, high natural & fired whiteness, high intensity, low contents of harmful impurities and good molding capability, mainly exported to top grade ceramic industries. The specification is as follows: SIO2: 50% max. AL2O3: 33% FE2O3: 0.4% max. Na2O: 0.3% max. K2O: 2.5% max. CaO: 0.05% max. TiO2: 0.05% max. MgO: 0.35% max. MnO: 0.02% max. Natural Whiteness: 80 Fired whiteness: 89 Loss of ignition: 12.5 PH: 5.5~6.5 325 Mesh residue: 1.0% max. Moisture: 15% max. ***Above content only for reference. ***Moisture: can be adjusted according to customers' requirements. ***Packing: 25KGS / 40KGS / 50KGS / 1000KGS net in plastic woven bags, or customers option. *** Process covering products according to customers requirements. Welcome your inquiry for further details! We will supply our best goods & service to you. Thanks & best regards!