A study of colorants used in the coloring of plastic products. The course will present the properties of the main types of organic and inorganic pigments, as well as solvent dyes used to color the many different polymers used in the plastics industry. Basic chemistry required to understand colorant interactions will be covered. Emphasis will be placed on the selection criteria used to select colorants for a given application. Properties examined will include: heat stability, light-fastness, weatherability, dispersability, chemical stability, and coloring strength.