Ultra high speed presensitized lithographic plates

Details Ultra high speed presensitized lithographic plates Ultra high speed presensitized lithographic plates

1979-06-01

1981-04-21

Bowers, Jr, Charles L.

Radiation imagery chemistry: process, composition, or product th

Diazo reproduction, process, composition, or product

Composition or product which contains radiation sensitive...

430156, 430162, 430168, 430175, 430176, 430302, 430327, 430935, 427352, 427353, 427354, G03C 154, G03C 171, G03F 708

Patent

active

042633923

ABSTRACT:
Presensitized lithographic plates having a diazo layer are prepared such that they exhibit a photospeed rendering them suitable for ultra high speed operations including use within laser platemaking systems. These ultra high speed plates have a diazo layer that is exceedingly thin while still being generally uniformly distributed throughout the plate area. The process includes extracting a significant quantity of diazonuim compound or diazonium resin from a diazo layer on a presensitized plate substrate. Plates thus formed are useful in laser exposures for facsimile transmissions, as projection plates, as camera back plates, for step and repeat plate work, and where low intensity light sources are used in conjuction with very large plates.

REFERENCES:
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patent: 3544317 (1970-12-01), Yonezawa et al.
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patent: 3933499 (1976-01-01), Traskos
patent: 4020762 (1977-05-01), Peterson
patent: 4092170 (1978-05-01), Houtermans et al.
patent: 4104072 (1978-08-01), Golda et al.
patent: 4116695 (1978-09-01), Mori et al.
patent: 4154613 (1979-05-01), Doering

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