define titanium dioxide

In the paint industry, titanium dioxide serves as a critical component due to its excellent hiding power and durability. It enhances the coverage of paints and protects substrates from UV damage, extending the lifespan of coatings. In plastics, it not only provides color but also improves the strength and stability of the final product. In paper manufacturing, titanium dioxide contributes to higher opacity and printability, resulting in superior graphic arts products.

...


The refractive index, represented by the letter n, of a material describes how light propagates through and is bent by, that material. The magnitude of the refractive index, depending upon the electronic structure of the molecules, governs to what extent the path of light changes, when entering or leaving a material.

Particles in a matrix, like pigment particles surrounded by the binder system in a coating, ink or plastic, can change the propagation direction of light when the particles and the matrix have a different refractive index. This phenomenon, called scattering, results in both white color (provided that the particles do not absorb visible light) and the hiding power of the coating.

...