Patent ID: 6780577
Filing Date: 2004-08-24
Classification: G03C

Abstract:
A silver halide photographic material containing silver halide grains onto which a sensitizing dye in a first layer and a sensitizing dye or dyes in a second or after layers are multilayer-adsorbed, wherein the sensitizing dye or dyes in the second or after layers are represented by formulas (III) or (IV): where in formula (III), Lc1, Lc2, Lc3, Lc4 and Lc5 each represents a methine group, Sc1 represents a linking group, Zc1 and Zc2 each represents an atomic group that forms a 5- or 6-membered nitrogen-containing heterocyclic ring, and pc1 and pc2 each represents 0 or 1, Mc1 represents a counter ion for equilibrating a charge, and mc1 represents a number of from 0 to 10 to neutralize a charge in the molecule, and where in formula (IV), Lc6, Lc7, Lc8, Lc9, Lc10, Lc11 and Lc12 each represents a methine group, Sc2, Sc3 and Sc4 each represents a linking group, Zc3 and Zc4 each represents an atomic group that forms a 5- or 6-membered nitrogen-containing heterocyclic ring, and pc3 and pc4 each represents 0 or 1; Mc2 represents a counter ion for equilibrating a charge, and mc2 represents a number of from 0 to 10 to neutralize a charge in the molecule, and wherein the fluorescence life time of the dye or dyes in the second or after layers on the silver halide grain surface measured at a maximum wavelength of fluorescence spectrum is shorter than the fluorescence life time of the dye or dyes in a gelatin dry film measured at a maximum wavelength of fluorescence spectrum.