Photograhic silver halide material and process for preparing sil

Details Photograhic silver halide material and process for preparing sil Photograhic silver halide material and process for preparing sil

1997-11-05

2000-11-21

Chea, Thorl

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Silver compound sensitizer containing

430264, 430588, G03C 118

Patent

active

061500836

ABSTRACT:
It was found that good sensitizing activity in the red spectral region and without residual stain can be obtained with dyes of the general formula (I) ##STR1## wherein R.sub.1 is an alkyl group having 1 to 6 carbon atoms or a heterocyclic ring, R.sub.2 and R.sub.3 are hydrogen, methyl, or methoxy, but at least one of the groups R.sub.2 and R.sub.3 is not hydrogen, R.sub.4 and R.sub.5 are alkyl groups having 1 to 6 carbon atoms that can be substituted with hydroxyl groups, and X.sup.- is an anion.
The invention can be used for preparing silver images, for example, for reproduction in preprint operations for black and white or multicolor printing.

REFERENCES:
patent: 5306598 (1994-04-01), Kolosick
patent: 5415980 (1995-05-01), Ohshima

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