Method for rendering silver areas of a silver based printing pla

Radiation imagery chemistry: process – composition – or product th – Nonradiation sensitive image processing compositions or... – Bleach or intensification

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430204, 430309, 430331, 430432, 430248, 430463, 430493, 101465, 101466, G03C 540, G03C 544, G03C 806, G03F 707

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054361192

ABSTRACT:
The present invention provides a conversion liquid for converting silver areas of a silver based printing plate into ink repellant areas while rendering background areas of said silver based printing plate ink accepting, said conversion liquid comprising a hydrophobizing compound capable of adsorbing to said hydrophilic background areas and a hydrophilizing compound capable of adsorbing to said silver areas and/or a bleaching compound capable of oxidizing the silver in said silver based printing plate.

REFERENCES:
patent: 2297929 (1942-10-01), Wise
patent: 3260198 (1966-07-01), Wagemans et al.
patent: 3592647 (1971-07-01), Blake et al.
patent: 4837122 (1989-06-01), Kondo et al.
patent: 5068164 (1991-11-01), Kondo et al.
patent: 5308746 (1994-05-01), Barnett et al.

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