Effect of pigmentation on gloss

Since the size of surface defect which has a detrimental affect on specular gloss is comparable with that of some pigment particles it follows that in paint systems where pigment is present at the surface, gloss may be significantly affected. The size of titanium dioxide crystals, for example, is about 0.2 ?m so depending on the paint system used, the type of pigment and its concentration are important factors.