Shape heavy calcium carbonate is irregular, quite different particle size, and the particles have a certain angular, rough surface, a wide particle size distribution, the larger particle size, the average particle diameter is generally 1 ~ 10μm. Heavy calcium carbonate in its original average particle diameter (d) is divided into: coarse grinding calcium carbonate (> 3μm), finely ground calcium carbonate (1 ~ 3μm), ultra-fine calcium carbonate (0. 5 ~ 1μm of heavy calcium carbonate . Powder characteristics: a particle of irregular shape; b wide particle size distribution; c larger particle size present, calcium carbonate has been widely used in papermaking, plastics, plastic film, chemical fiber, rubber, adhesives, sealants,... household chemicals, cosmetics, building materials, coatings, paints, inks, putty, sealing wax, putty, carpet packaging, pharmaceuticals, foods (such as chewing gum, chocolate), feed, and its role are: increased product volume, reduce costs, improve processability (e.g. to adjust the viscosity, rheological properties, curing properties), improved dimensional stability, a reinforcing or semi-reinforcing, improved printing performance, improved physical properties (such as heat resistance, matting property, abrasion resistance, flame retardance , whiteness, gloss), etc. Light Gaifen widely used in papermaking, plastics, plastic film, chemical fiber, rubber, adhesives, sealants, household chemicals, cosmetics, building materials, coatings, paints, inks, putty, sealing wax , putty, carpet packaging, pharmaceuticals, foods (such as chewing gum, chocolate), feed, and its role are: increased product volume, reduce costs and improve the processing performance (such as adjusting the viscosity, rheological properties, curing properties), improved dimensional stability sex, reinforcing or semi-reinforcing, improve printing performance, improve the physical properties (such as heat resistance, matting, abrasion resistance, flame resistance, whiteness, gloss) and the like.