Correcting liquid for a silver imaged lithographic printing plat

Details Correcting liquid for a silver imaged lithographic printing plat Correcting liquid for a silver imaged lithographic printing plat

1996-12-04

1999-08-31

Schilling, Richard L.

Radiation imagery chemistry: process, composition, or product th

Imaging affecting physical property of radiation sensitive...

Finishing or perfecting composition or product

430204, 430264, 430460, 430461, 430493, 101465, 2521861, G03C 544, G03F 707, G03F 726, B41M 500

Patent

active

059452625

ABSTRACT:
The present invention provides a correcting liquid for silver imaged lithographic printing plates being an aqueous solution having a pH in the range between 5.5 and 8.5 and comprising a iron (III) complex salt of an organic acid, a sulphite or a metabisulphite, a silver halide solvent and an accelerator, said accelerator being an organic heterocyclic compound having a mercapto- or thione group and not having a hydrophilic substituent besides the said mercapto or thione group characterized in that said accelerator is present in an amount ranging from 0.04 to 0.4 mole per liter of correcting liquid.

REFERENCES:
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patent: 4780398 (1988-10-01), Kim
patent: 4837122 (1989-06-01), Kondo et al.
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patent: 4985347 (1991-01-01), Fujimoto et al.
patent: 4987058 (1991-01-01), Spriewald et al.
patent: 5043253 (1991-08-01), Ishikawa et al.
patent: 5139920 (1992-08-01), Hayashi et al.
patent: 5298370 (1994-03-01), Kojima et al.

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