lithopone is a white powder,a mixture of barium sulfate and zinc sulfide and it was non-toxic,tasteless,odorless,and insoluble in water.it is used as one of the important inorganic chemicals pigmentfor its good colouring and hiding power and good weather resistance.in addition, ihas a good heat resistance which can improve the weather resistance and anti-algae,and excellent cover on the white power.and it can also decrease the costs.