Patent ID: 6150083
Filing Date: 2000-11-21
Classification: C07D,G03C

Abstract:
A photographic silver halide material comprising at least one photosensitive, silver halide emulsion layer on a support, the emulsion layer containing at least one sensitizing dye that sensitizes the silver halide for light in 600 to 690 nm spectral range, said sensitizing dye having the formula (I) ##STR7## 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; wherein said sensitizing dye does not contain a sulfonic acid group or a carboxyl group in its molecule.