China clay: the available grades of china clay & other clays are too numerous to list completely. In ceramics pottery & paper coating, the composition of purest china clay, from which particles of quartz /sand have been washed out, resembles that of Kaouin/washed clay. Quartz contain decreases the plasticity & shrinkage Do it must be removed.
This grade of clay is purest, whitest and most expensive clay. In Refractory grade china clay, it would be most suitable for the brick, Insulators, craciable, portland and cement and above refractory bricks.
For soap and detergent industries, our bright and normal grade china clay is used as filter. Bright china lay is having whitens 82%, Al2O3 37-38% with low silica.