China Clay

China clay is characterized by its fine particle size, high brightness and rheology. We develop fine and ultra fine grades of Hydrous Kaolin from our best reserves, for various industries including Paint, Paper, Printing Inks, Paper board, Rubber etc. China clay is a natural mineral found in partly decompo-sed granite, an igneous feldsparic rock. Chemically, kaolin is a hydrated aluminium silicate containing Al2O3.2SiO2.2H2O. Kaolin was first discovered in the mountainous province of Kiangsi, China in A.D. 500. The word kaolin derives from the Chinese character kaolin which means high ridge. It was first used by the Chinese to make high quality porcelain. Product Specifications PARAMETERS PI 96(noodles) PI 95(M) PI 94 PI 92 PI 90 1RL RESULT (%) RESULT (%) RESULT (%) RESULT (%) RESULT (%) RESULT (%) Loss of Ignition 13.56 13.81 14.82 13.31 13.190 10.850 Silica as SiO2 45.85 48.10 47.57 45.90 46.400 51.620 Iron as Fe2O3 0.29 0.30 0.35 0.536 0.300 1.530 Alumina as AI2O3 38.99 35.43 35.48 38.70 38.190 33.770 Potassium as K2O 0.047 0.20 0.035 0.067 0.083 0.210 Sodium as Na2O 0.048 0.24 0.051 0.0396 0.100 0.1400 Calcium as caO Trace 0.31 0.15 Trace Trace Trace Magnesium as MgO 0.097 0.32 0.107 0.109 0.170 0.290 Titanium as TiO2 0.85 1.28 1.180 1.100 1.290 1.32 Firing Whiteness 92.00 87.59 89.20 89.90 81.60 63.00 L Value 95.89 94.54 95.33 94.83 93.07 87.71 A Value 0.40 1.23 0.56 0.65 0.72 1.72 B Value 3.39 3.00 3.78 3.30 5.90 11.70 Firing Colour Snow White Creamish White White Creamish Pinkish Shrinkage 5.80 4.75 5.80 5.20 7.56 9.00 Firied Temperature C 1220 1220 1220 1220 1220 1220 Residue On 325# 0.34 0.25 0.36 0.24 0.88 1.08 Water Of Plasticity 36.00 34.00 38.00 41.00 46.0 41 Water Absorption 15.56 14.30 15.42 19.24 17.09 15.81 Dry M.O.R Kg/cm2 15.00 24.31 10.00 12.00 10.00 10.00 Fired M.O.R Kg/cm3 120.00 237.66 140.00 140.00 145.00 110.00