The fine particle size contributes to gloss preservation.
Barium sulfate is reported to help make paint film harder and tougher.
The low oil absorption and chemical resistance are attractive features. The brightness, compatability, and dispersion properties make barium sulfates excellent candidates for these coatings. The high specific gravity helps to lower overall cost per pound. Barium sulfate is an excellent filler because of its high density. Its refractive index will not detract from the refractive index of the plastic.