| 摘要 |
PURPOSE:To obtain a sharp and fog-free image, by adding monoaryl tin oxide as a positive charging controller of a color toner contg. a binder resin, a colorant and this controller to this resin by 0.5-10wt%. CONSTITUTION:Colorless monoaryl tin oxide giving intense positive charge is used as a positive charging controller. This 3pts.wt. controller is mixed with 96pts.wt. styrene-n-butyl methacrylate copolymer and 1pt.wt. rhodamine 6G lake pigment as a colorant, melted and kneaded. This mixture is finely pulverized to obtain a toner capable of controlling positive charging. A positively chargeable developer is obtained by mixing 100pts.wt. spherical iron oxide powder with this 3pts.wt. toner. This is strongly attracted to a negative electrostatic latent image on a photoreceptor to form a sharp color image without scattering the toner from a developing machine. |
