Electrophotographic color proofing method

Details Electrophotographic color proofing method Electrophotographic color proofing method

G - Physics

03

G

96/224

G03G 13/01 (2006.01) G03F 3/10 (2006.01) G03G 5/12 (2006.01)

Patent

CA 1264023

ELECTROPHOTOGRAPHIC COLOR PROOFING METHOD Abstract An electrophotographic proofing method is described that uses a proofing element comprising a photoconductive layer on an electrically conducting substrate capable of transmitting actinic radiation to which the photoconductive layer is responsive, and a dielectric support, releasably adhered to the sub- strate or photoconductive layer, comprising the photoconductive layer or an overcoat thereof forming a surface of the element capable of holding an applied electrostatic charge. In the method the dielectric support surface is charged, and the photoconductive layer imagewise-exposed to actinic radiation, thereby forming a developable electro- static image on the dielectric surface. The electro- static image, in turn, is developed with toner to form a first color image. A composite color image is formed on the element by repeating the sequence one or more times with image-wise exposure of the photo- conductive layer to actinic radiation transmitted through the transparent substrate, and developing over each preceding image with a different color toner. The composite toner image is transferred with the dielectric support to a receiving element to form a color copy such as a three-color filter array or a color proof closely simulating the color print expected from a full press run.

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