How does TiO2 provide opacity?
When all of the visible light that falls on a surface, is scattered, then only opacity is appeared. Titanium dioxide is considered as an efficient light scatterer. When there is enough pigment of TiO2 in an object or a film, only a small amount of light will be absorbed by the pigments or polymer and rest of the light will be striked off. The striked off light will be scattered outward and the system will appear as opaque and white.
