Pre-bake printing plate composition

Details Pre-bake printing plate composition Pre-bake printing plate composition

Filed on

1992-08-12

Date issued

1993-05-25

Examiner

McCamish, Marion E.

Patent Class

Radiation imagery chemistry: process, composition, or product th

SubClass

Imaging affecting physical property of radiation sensitive...

SubSubClass

Making printing plates

Other Related Categories

430302, 430330, 430331, 1014631, G03F 740

Type

Patent

Status

active

Patent number

052139506

Description

ABSTRACT:
An aqueous composition useful for the protection of actinic light-exposed presensitized lithographic printing plates. The composition comprises an effective amount of (a) an ammonium, sodium, potassium or lithium salt of a strong organic acid, and (b) an ammonium, sodium, potassium or lithium salt of an anionic surfactant which contains functionalities of the salt of a strong organic acid and the salt of a weak organic acid, and (c) an ammonium, sodium, potassium or lithium salt of a weak organic acid. The composition is applied to the surface of the plates after they have been developed, but before they have been baked, thereby preventing surface contamination that would otherwise occur from the heat treatment.

REFERENCES:
patent: 3669660 (1972-06-01), Golda et al.
patent: 4277555 (1981-07-01), Fromson et al.
patent: 4294910 (1981-10-01), Wielinga
patent: 4391897 (1983-07-01), Gracia et al.
patent: 4762771 (1988-08-01), Matsumoto et al.
patent: 4786581 (1988-11-01), Stahlhofen et al.
patent: 4885230 (1989-12-01), Stahlhofen et al.
patent: 5021324 (1991-06-01), Jargiello et al.
patent: 5168813 (1992-12-01), Riley et al.

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