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We are in need of super-fine aluminium silicate as the following specification.Specifications:Appearance:white powder SiO2: 78-82% Al2O3: 11-13% Na2O: 9%max Water content: 6-9%Ignition loss: 7-9Bulk specific gravity: 0.20-0.28PH valuie(5% water solution): 9.7-10.8Whiteness: 97%minAverage granularity diameter(um): 1.5maxUse: Mainly used in paints as the filler,rubber,plastic,printing ink,printing and dyeing xxxxxPacking:25kg/pp net bagPlease send us the detailed information of your product and your best competitive price. We also would like to have the sample of the product for testing its quality and analysis. super-fine, aluminium silicate, powder aluminium silicate,barium sulphate