Coloration of Plastics is a key process which is mainly carried out to improve Plastics’ aesthetics but also to enhance Plastics’ performance in use.
From the very beginning of the history of Plastics inorganic pigments have very well fit into the coloration of such material due to their excellent general:
Compatibility with all kinds of polymers
Maintenance of polymer’s dimensional stability
Light and weather fastness
Insolubility, avoiding migration tendencies
Moreover, and with a few well-known exceptions, inorganic pigments are generally safe in processing and final-use and environmentally-friendly too.