FORMATION APPARATUS OF MULTICOLOR IMAGE

PROBLEM TO BE SOLVED: To improve the image quality of multicolor printing by developing a latent image recorded on a charge holding surface having a voltage saturated level by a non-black toner grain layer, and thereafter recording the following latent image in a specified exposure level. SOLUTION: A corona generating device 22 charges the photoconductive surface of a light receiving body belt 10 to a relatively high and uniform potential, and a laser base output scanning device 24 discharges this charge holding surface. A developing structure 26 brings an insulating magnetic brush material 31 into contact with an electrostatic latent image, a pair of corona recharging devices 36, 37 uniformly regulate the voltage levels of the toned and non-toned areas of the light receiving body surface, and a second exposing device 38 containing a laser base output structure selectively discharges the light receiving body according to an image to be developed with a second color developer. The latent image recorded on the charge holding surface having a voltage saturated level is developed with a non-black toner grain layer, and the following latent image is then recorded at an exposure level which is the function of the voltage saturated level and the maximum mass of the non-black toner grain layer.