Multicolor electrophotographic process using TiO.sub.2

Details Multicolor electrophotographic process using TiO.sub.2 Multicolor electrophotographic process using TiO.sub.2

1982-11-19

1985-06-25

Martin, Roland E.

Radiation imagery chemistry: process, composition, or product th

Electric or magnetic imagery, e.g., xerography,...

To produce color reproduction

430 42, 430 31, 430902, G03G 1301

Patent

active

045254419

ABSTRACT:
In practicing multi-step reproduction of color image by electrophotography using an electrophotographic photosensitive material prepared by overlaying a photosensitive layer composed mainly of titanium dioxide and a binder on an electroconductive substrate, exposure to an optical image is first carried out, then positive corona charging is carried out to form a positive electrostatic latent image and subsequently developing is carried out. Further, prior to the exposure to an optical image, negative corona charging and/or AC corona charging are additionally carried out. By this electrophotographic process effectively utilizing the photomemory effect of titanium dioxide, multi-color images can be produced, and an image having good contrast can be reproduced easily and stably.

REFERENCES:
patent: 2976144 (1961-03-01), Rose
Iida et al., "Temperature Dependence of Dark-Delay Properties of TiO.sub.2 -Polymer Dispersion Layers", Electrophotography, vol. 11, No. 2, 1971, pp. 83-89.

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