Abstract
In the “One Drum Color Superimposing Process”, a full color image is formed by sequential processes of charging, exposing and developing of each color component directly onto the photoconductor. In this report, the electrostatic effect of the toner layer over the latent image on the image formation is studied. There are two effects mainly. One is the toner charge which cannot be erased by light exposure, and the other is the dielectric properties of the toner which covers the latent image on the photoconductor. High toner charge causes the rise of the exposed potential of the photoconductor, which prevents superimposing development on the preceding toner image. Moreover, high toner charge causes lowering effect of the surface potential at the corona charging process. The dielectric properties of the toner affect the resolution of the succeeding development because of its shielding effect of the charge pattern. It becomes clear that the toner charge must be sma11, and the thickness of the toner layer must be thin in this color process.
