... two main areas, one of filling materials used in the paper (or dipping) process, and the other is the use of pigments in the surface coating process.Kaolin ... , greatly improved the quality of the paper.Specification:325mesh, 500mesh, 800mesh, 1250mesh, 2500mesh, 3000mesh etc.Physical analysis: Chemical composition Physical indicatorsAL2O3%SiO2%Fe2O%3325 ...