Method for preparation of printing plate by electrophotographic

Details Method for preparation of printing plate by electrophotographic Method for preparation of printing plate by electrophotographic

1995-12-05

1997-01-28

Goodrow, John

Radiation imagery chemistry: process, composition, or product th

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

To produce printing surface

430 96, G03G 5047

Patent

active

055976727

ABSTRACT:
A method for preparation of a printing plate by an electrophotographic process comprising providing a peelable first transfer layer (T.sub.1) containing a resin (A) capable of being removed upon a chemical reaction treatment on an electrophotographic light-sensitive element, forming a toner image on the first transfer layer by an electrophotographic process, either (a) providing a second transfer layer (T.sub.2) containing a resin (A) capable of being removed upon the chemical reaction treatment on the toner image and the first transfer layer in the non-image area and transferring the toner image together with the first transfer layer and the second transfer layer from the light-sensitive element to a receiving material having a surface capable of providing a hydrophilic surface suitable for lithographic printing at the time of printing, or (b) transferring the toner image together with the first transfer layer from the light-sensitive element onto the second transfer layer (T.sub.2) provided on the receiving material, and then removing the whole first transfer layer (T.sub.1) and the second transfer layer (T.sub.2) in the non-image area by the chemical reaction treatment.
According to the method, printing plates which produces prints of good image qualities can be continuously obtained in a stable manner for a long period of time even when the transfer is conducted under conditions of low temperature, low pressure and high speed.

REFERENCES:
patent: 5459005 (1995-10-01), Kato et al.
patent: 5501929 (1996-03-01), Kato et al.

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