CROWDING AND SPACING OF TITANIUM-DIOXIDE PIGMENTS

For geometric reasons, the maximum size of extender particles intended to improve hiding is limited by rutile size and volume concentration. Maximum size of hiding effective extender is small, less than commercial products and dispersion processes can deliver. Hiding improvements can, however, be obtained through uniform spacing of rutile by coatings no rutile particles. The hiding power advantage of such product over conventional rutile could be as much as 10%.