Fillers or dyes have a high reflection- and scattering effect over the entire visible spectrum. This leads to a high covering power and a high whiteness.
Titanium dioxide represents the most important white pigment. It provides the highest covering power and the highest whiteness. Zinc sulfide – also known as zinc white when used in combination with barium sulfate – ensures a smaller friction effect and less abrasion in the production facilities. Calcium carbonate is usually used in titanium dioxide recipes or for the formation of empty spaces in bio-oriented films.