Patent ID: 6140035
Filing Date: 2000-10-31
Classification: G03C

Abstract:
A photographic element comprising at least one silver halide emulsion layer in which:a) the silver halide has been sensitized with a first J-aggregating blue sensitizing dye having a .lambda..sub.1 less than or equal to about 475 nm and a second J-aggregating blue sensitizing dye having a .lambda..sub.2, wherein said first and second dyes form a mixed aggregate and wherein .lambda..sub.1 is longer than .lambda..sub.2, and .lambda..sub.1 and .lambda..sub.2 are separated by an energy gap, .DELTA.E, which does not exceed 0.12 eV, where .DELTA.E is defined by the following equation: ##EQU3## wherein .lambda..sub.1 is the wavelength in nanometers (.mu.m) of maximum absorption of a silver halide emulsion sensitized with the long dye and .lambda..sub.2 is the wavelength of maximum absorption of a silver halide emulsion sensitized with the short dye, with the proviso that neither the first nor the second dye contains selenium and that each dye contains an anionic water solubilizing group; andb) the silver halide has been chemically sensitized with a gold(I) compound of formula (Ia) or (Ib):AuL.sub.2.sup.+ X.sup.- (Ia)orAuL(L.sup.1).sup.+ X.sup.- (Ib)whereinL is a mesoionic compound;X is an anion; andL.sup.1 is a Lewis donor ligand.