Main types
Colorants and pigments

A filler is a solid substance used in plastics. They are introduced to modify or reinforce physical or mechanical properties, improve fire resistance or reduce cost. Its incorporation rate varies from a few % to several dozen %.

For example:

• mineral fillers (talc, barium sulfate, antimony oxide, etc.);

• organic fillers (wood flour, etc.);

• reinforcing fillers (glass fibers, flax fibers, etc.).

The Colour Index CI is a systematic way of identifying a colorant and its chemical formula. This coding system is universally known. An association of American chemists (The Society...