Patent ID: 6787297
Filing Date: 2004-09-07
Classification: G03C

Abstract:
A silver halide photographic element comprising at least one silver halide emulsion comprising silver halide grains which have associated therewith at least an inner dye layer and an outer dye layer wherein the outer dye layer comprises a dye having at least one substituent that has a positive charge, said photographic element further comprising a cyanine dye of formula (I) or (II) that is capable of spectrally sensitizing a silver halide emulsion: wherein:X is O or NR4; Y is O, S, or NR4; R1 is H or a 1-4 carbon alkyl group; R2 and R3 are independently 1-6 carbon alkyl group comprising an acid salt substituent; R4 is a 1-4 carbon alkyl group; V1 to V4 are hydrogen or substituents with a pi constant of less than 1.0; M is a counterion to balance the charge if necessary; wherein:W is O, S, Se, or NR4; Z is S or Se; R5 is H, or a 1-4 carbon alkyl group; R6 and R7 are independently 1-6 carbon alkyl groups comprising an acid salt substituent; R4 is a 1-4 carbon alkyl group; V5 to V8 are hydrogen or substituents with a pi constant of less than 0.75 provided that at least three of V5 to V8 are hydrogen or substituents with a pi constant of 0.65 or less; M1 is a counterion to balance the charge if necessary.