Patent ID: 6312883
Filing Date: 2001-11-06
Classification: G03C

Abstract:
A silver halide photographic material comprising at least one silver halide emulsion comprising silver halide grains having associated therewith at least two dyes:(a) a first dye that has at least one anionic substituent and that is capable of spectrally sensitizing a silver halide emulsion; and(b) a second dye of formula II ##STR43##wherein:R.sup.1 is a substituted or unsubstituted alkyl or aryl group;E.sup.3 represents the atoms necessary to complete a substituted or unsubstituted 5- or 6-membered heterocyclic nucleus;Ar.sup.1 represents an electron-withdrawing substituted aryl, or a substituted or unsubstituted electron-withdrawing heteroaryl group;L.sup.11 through L.sup.14 are substituted or unsubstituted methine groups;s is 0 or 1;G.sup.1 is an electron-withdrawing group;G.sup.2 is O or dicyanovinyl (C(CN).sub.2);W.sup.1 is a counterion if necessary; and wherein at least one substituent on the dye of formula II is a cationic substituent or can be protonated to form a cationic substituent.