| 摘要 |
PURPOSE:To enhance spectral reflection characteristics and electrostatic chargeability by incorporating a specified anthraquinone derivative as a colorant. CONSTITUTION:The color toner contains as the colorant one of the anthraquinone derivatives represented by formula I in which R is H or lower alkyl and X is halogen. These compounds can be used as the main component of a magenta toner, and in the case of other color toners, they can be added to improve their colors. It is possible to use quaternary ammonium salts, basic and electron-donative organic substances as a positive charge controller not causing problems in color reproduction, and metal chelates, metal-containing dyes, acidic or electron-attractive organic substances, and the like as a negative charge controller not causing such problems for electrostatic charge control, when it is necessary, thus permitting spectral reflection characteristics and electrostatic chargeability to be enhanced. |
