Optical Properties of Titanium Dioxide for Pigments
The main optical properties of titanium dioxide for pigments lie in its opacity when dispersed in media and applied to surfaces (as coatings). Important optical properties that are interrelated with opacity to varying degrees are brightness, whiteness, hue, achromatic power and hiding power. The opacity of titanium dioxide depends to a large extent on its refractive index to light and particle properties. Particle properties include particle size, particle size distribution and particle shape. In addition, the ability of titanium dioxide to disperse in various media is also an important factor. Because in most cases, whether the optical properties of the pigment can be fully revealed also depends on how well the titanium dioxide is dispersed, and the dispersion is often closely related to the particle properties and surface properties.
