The following introduces lithopone as a mixed crystal of barium sulfide and zinc sulfate. With the continuous progress of life, lithopone has been widely used in many fields.What are the uses of lithopone? White powder is a mixture of zinc sulfide and barium sulfate. White crystalline powder. It is a mixture of zinc sulfide and barium sulfate. The more zinc sulfide, the stronger the hiding power and the higher the quality. Density 4.136 ~ 4.34 g/cm3, insoluble in water. It is easy to decompose in case of acid to produce hydrogen sulfide gas, but has no effect in case of hydrogen sulfide and alkali solution.After being irradiated by ultraviolet rays in sunlight for 6 ~ 7h, it turns light gray, and it still recovers its primary colors after being put in the dark. It is easy to oxidize in the air, and it will agglomerate and deteriorate after being affected with damp. Its whiteness and hiding power are stronger than zinc oxide, and its refractive index and opacity are higher than zinc oxide and lead oxide, but inferior to titanium dioxide.

Lithopone is used as a coloring inorganic white pigment for paints, inks and rubbers, and is widely used as a white pigment for plastics such as polyolefin, vinyl resin, ABS resin, polystyrene, polycarbonate, nylon and polyformaldehyde, as well as paints and inks. It has poor effect in polyurethane and amino resin, but is not suitable for fluoroplastics. It is also used for coloring rubber products, paper making, lacquer cloth, oilcloth, leather, watercolor pigment, paper, enamel, etc. Used as adhesive in the production of electric beads.The near spherical nano-lithopone composite pigment containing cubic ZnS (with a diameter of 15 ~ 30 nm) and orthogonal BaSO4 (with a diameter of 60 ~ 100 nm) was synthesized by emulsion method in industrial production. Compared with self-made lithopone, nano lithopone has improved coloring power by 20%/25%, increased oil absorption by 75%/85%, and obviously improved transparency. It has a good hiding power, which determines the non-grinding production process of some water-based coatings, and can directly disperse lithopone to obtain the desired market effect of coatings.