Because of their low reflectivity, they're best used in darkened rooms. Matt white screens are often described as scatter screens, because none of the light striking the screen is absorbed, and all reflected light is scattered in an isotropic manner. This gives them an extremely wide viewing angle. Matt white screens are generally made from magnesium carbonate, which is a very good diffuser. For use in rooms that can't be completely darkened, a more reflective surface is needed, such as a lenticular, spectra or pearlescent screen.
Lenticular screens have thin ridges in the viewing surface.
They're brighter than matt white screens, but suffer from a narrower viewing angle. A layer of mica coated with titanium dioxide provides a reflective surface, while a diffuser material, such as magnesium carbonate, sits in front of this to provide the improved viewing angle. Beaded screens are covered with tiny glass beads and are best described as refractive. Unlike reflective types, where light is reflected at the angle of incidence, or matt white screens, where light is scattered uniformly, beaded screens return the light in the same direction as its source. In fact, the only real difference is that instead of using substances that are reflective, coatings like silica are substituted for their transmissive properties.