| 摘要 |
PURPOSE:To obtain toner for polychromatic electrophotograph which provides a polychromatic image having high visibility by using coloring material which has specific properties for the toner. CONSTITUTION:Heat-sensitive coloring material made of colorless dye and acid material forms powder together with resin material and a conduction offering agent is added to obtain the target toner. Consequently, neither the supply of specific charges to the surface of a photosensitive body 8 nor light irradiation for read image exposure is impeded by a colorless toner image corresponding to a black image part in an original image formed on the surface of the photosensitive body 8 during an electrostatically charging process by a charge unit 4 and a red image exposing process. Therefore, a charge pattern corresponding faithfully to the red image part in the original image is formed on the surface of the photosensitive body 8 where the colorless toner image is formed previously, and the charge pattern corresponding to the red image part is developed to obtain a dichroic picture with high visibility after transfer to normal paper and fixation. |
