Method for preparing lithographic printing plates not requiring

Details Method for preparing lithographic printing plates not requiring Method for preparing lithographic printing plates not requiring

1991-09-10

1993-10-12

McCamish, Marion E.

Radiation imagery chemistry: process, composition, or product th

Imaging affecting physical property of radiation sensitive...

Making printing plates

430309, 430326, 430331, G03F 730

Patent

active

052524310

ABSTRACT:
A method for preparing a lithographic printing plate not requiring dampening with water comprising the steps of imagewise exposing to light a presensitized plate for use in preparing a lithographic printing plate not requiring dampening with water which comprises a substrate provided thereon with a light-sensitive layer and a silicone rubber layer in that order and then spraying a pressurized liquid on the plate surface to remove the silicone rubber layer of the image areas. The method does not require the use of brush rolls or developing pads which directly come in contact with the plate surface and give rise to wear and/or bending. Therefore, the method always ensures excellent quality and uniformity of development. Further, the method may be carried out repeatedly with less maintenance of equipment since it is not necessary to use any developing pad or brush roll which must frequently be exchanged due to wear or bending.

REFERENCES:
patent: 4142194 (1979-02-01), Hamlin
patent: 4196018 (1980-04-01), Inoko et al.
patent: 4371250 (1983-02-01), Wakabayashi et al.
patent: 4428659 (1984-01-01), Howard
patent: 4588277 (1986-05-01), Buckler
patent: 4959296 (1990-09-01), Yoshida et al.
patent: 5055870 (1991-10-01), Ohba et al.

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