A colorant is a substance that is used for coloring a material and colorants are the formation of pigments or dyes. Three categories of colors are used to manufacture thermoplastic colorants. Typical dyes are formulated as a solution and pigments are made up of solid particles.
• Physical and chemical properties of colorants
• Historical aspects of colorants
• Biological properties of colorants
• Interactions of colorants with media
• Art supplies
• Photographic materials