PURPOSE: To obtain a distinct image consisting of a chromatic color and an achromatic color by dividing an original image into each hue, carrying the first image information by a photosensitive drum, projecting the second image information of an ion current of negative of the opposite polarity, to said image information, and synthesizing a latent image.

CONSTITUTION: An image of an original 44 is reflected by mirrors 62, 64, and made incident on a dichroic mirror 47. By its mirror 47, a chromatic color light is reflected, and its complementary color light is made to transmit. Subsequently, the complementary color light is advanced to a photosensitive drum 1 and the first image information is carried. Also, the reflected chromatic color light is advanced to a photosensitive screen drum 17 and the second image information is carried. Next, a photosensitive layer 56 of the photosensitive drum 1, and the screen drum 17 are electrified, for instance, to positive and negative, respectively. In this state, when a negative ion particle is projected from a charged particle source 19 of the screen drum 17, it passes through the drum 17, reaches the photosensitive layer 56 as negative image information, and a latent image is synthesized newly. Accordingly, the latent image separated into a positive chromatic color level and a negative chromatic color level is formed on both sides of an anchromatic color potential level, therefore, a distinct image can be obtained.