Haze

High quality (class A) surfaces are expected to have a clear and brilliant appearance. Microstructures, e. g. poor dispersion, can cause a milky appearance. This effect is described as milkiness or haze.

A high gloss surface with microscopic texture has diffused light with low intensity adjacent to the main direction of reflection. The majority of the incident light is reflected in the specular direction which makes the surface appear highly glossy with image forming qualities, but with a milky haziness on top of it.