Maximizing hiding power with TiO2
The main characteristics of TiO2 that influence hiding power are:
- High refractive index
- Optimized particle size
To achieve the full hiding power potential of TiO2 in coatings, the TiO2 must:
- be well dispersed initially and
- avoid particle re-agglomeration throughout coating production, storage, application and drying.
Low hiding power in a coating can be caused by:
- Inefficient Dispersion or Deagglomeration
- Pigment Flocculation
DuPont TiO2 products are designed to facilitate easy dispersion and to be compatible with other coating components that might induce flocculation or re-agglomeration of the TiO2 particles.
For more information on how to achieve and maintain TiO2 dispersion in coatings, please refer to section Enhancing TiO2 dispersion performance.
Hiding Power is an optical property used to describe the light-scattering efficiency of a white pigment. The hiding power of a paint measures its ability to obscure a background of contrasting color. White pigments scatter incident visible light at all wavelengths whereas colored pigments absorb incident visible light at characteristic wavelengths.