Electrophotographic color printing method

Abstract

An electrophotographic printer method for a printer including a photosensitive drum; a latent image former for forming electrostatic latent images based on the color-separated print information for individual colors on the photosensitive drum; a wet developer for developing the electrostatic latent images successively into toner images for the individual colors using liquid toners of different colors corresponding to the print information and for squeezing surplus liquid toners on the photosensitive drum; an intermediate transfer drum so that the toner images of the individual colors developed on the photosensitive drum are successively transferred to and deposited in layers to form a multicolor toner image; a transportation device for delivering a recording medium; and a transfer-fixing device for transferring to and fixing the multicolor toner image on the recording medium. The method is characterized by the wet developing step including successively developing the electrostatic latent images for the respective colors by a plurality of developing units and increasing the developing bias voltage of the developing unit which has finished developing to a voltage closer to the print area surface potential than the white ground surface potential when changing the developing units.