To provide a method for forming a multiple color image capable of stably obtaining an excellent color image and also a monochrome image even in the case of using the color copying machine both as the monochrome and the color.
This method for forming the multiple color image is, allowed to form the multiple color image on the image transfer body by repeating for the respective color, a step for forming a latent image in accordance with the respective color on the latent image carrier, a step for developing the latent image on the latent image carrier by adopting the developer consisting of tone and carriers in accordance with the respective color, and a step for transferring the developed toner image. In this case, the method is allowed to make processing speed beyond 200 mm/sec., the carriers average grain size as 20 to 50 μm, coverage of the toner with regard to the carriers as 20 to 70%, and the resistance of the sleeve length direction unit on the magnetic brush developing layer, in the rage of 109 to 1014 Ω under the magnetic field strength of 2.0 V/μm, and moreover the static charge quantity on the monochrome toner is lower than the charge quantity on another color toner.
IMAI TAKASHI
ISHIHARA YUKA
ICHIMURA MASANORI
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