| 摘要 |
PROBLEM TO BE SOLVED: To efficiently form an image, in minimizing the image forming time by performing the image formation by the appropriate image forming sequence in accordance with a color of the forming image. SOLUTION: At the time of forming the blue color image on the first side and the red color image on the second side, the device is allowed to form the cyan image C1 on the first side to a photoreceptor 11 and to transfer on the intermediate transfer belt 21. Next, the device is allowed to form the magenta image M1 on the first side to the photoreceptor 11 and to transfer on the intermediate transfer belt 21 in overlapping the cyan image C1, to successively form the magenta image M2 on the second face to the photoreceptor 11, and to perform the primary transfer the intermediate transfer belt 21. Thereafter, the device is allowed to form the yellow image Y2 written on the second side on the photoreceptor 11 by developing by yellow (Y) and to transfer in overlapping the magenta image M2 on the intermediate transfer belt 21. |
