Deleting fluid for printing plates and method for deletion

Details Deleting fluid for printing plates and method for deletion Deleting fluid for printing plates and method for deletion

1987-12-02

1989-06-06

Schilling, Richard L.

Radiation imagery chemistry: process, composition, or product th

Transfer procedure between image and image layer, image...

Diffusion transfer process, element, or identified image...

430248, 430205, 430302, 430309, 430430, 430431, 430461, 430331, G03C 554, G03F 706

Patent

active

048371220

ABSTRACT:
This invention provides a method for deleting images formed on offset printing plates which comprises treating the surface of undesired portion of the images formed by exposure and development with a deletion fluid which contains a ferric complex salt of an organic acid and 0.3 mol/liter or more of at least one compound selected from the group consisting of a soluble bromide and a soluble iodide. Preferred ferric complex salt is a ferric complex salt of aminopolycarboxylic acid.

REFERENCES:
patent: 3770437 (1973-11-01), Brugger et al.
patent: 4062682 (1977-12-01), Laridon et al.
patent: 4242442 (1980-12-01), Idota et al.
patent: 4603100 (1986-07-01), Boston
patent: 4746597 (1988-05-01), Zellmer et al.

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