Pigments for Color Toners

Abstract

Toner pigments must satisfy coloristic requirements such as hue, tinctorial color strength, and transparency; also they must exhibit good heat resistance and light fastness. In addition, toner pigments must meet tribo-electric requirements. Furthermore, chemical toners require specific compatibility in each chemical process. Chemically-identical pigments can show different properties depending on the production process. Through specialized and optimized synthesis/kneading/milling processes, toner pigments are specified in terms of particle shape, particle size distribution, surface character, impurities, crystallinity, etc. Micro-reactor technology could be a breakthrough for toner pigment development in the near future.