Printing plate and process for preparing the same

Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – To produce printing surface

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Details

430130, G03G 1326

Patent

active

055893074

ABSTRACT:
The present invention provides a process for preparing a printing plate, comprising the steps of: providing an N-type photoconductor layer having an optical memory property on the surface of a substrate having an electrical conductivity at least in its surface to form an N-type photoconductor substrate; subjecting the N-type photoconductor layer to a desired pattern-wise exposure by batch exposure and/or photo-drawing exposure to render exposed areas electrically conductive; immersing the N-type photoconductor substrate in an electrodeposition bath to electrodeposit an ionic organic polymer contained in the electrodeposition bath to form an electrodeposit layer; and washing and drying the electrodeposited substrate to prepare a printing plate.
Further, the present invention provides a process for preparing a printing plate, comprising the steps of: subjecting an N-type photoconductor layer provided on an N-type photoconductor substrate to a desired pattern exposure by batch exposure and/or photo-drawing exposure to render exposed areas electrically conductive; electrodepositing an ink-receptive component on the exposed areas; and transferring the ink-receptive component onto a substrate for a printing plate to prepare a printing plate having an ink-receptive area.
Furthermore, the present invention provides a process for preparing a printing plate, comprising the steps of: exposing the whole surface or a necessary region of an N-type photoconductor layer provided on an N-type photoconductor substrate, thereby rendering exposed areas electrically conductive; heating the exposed areas by hot pattern drawing to erase the conductivity of the heated areas; and electrodepositing an electrodeposition material on the remaining conductive areas to form an electrodeposit layer.

REFERENCES:
patent: 3245784 (1966-04-01), Stricklin
patent: 3802879 (1974-04-01), Ovshinsky et al.
patent: 5326664 (1994-07-01), Takagami et al.

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