Patent ID: 7238467
Filing Date: 2007-07-03
Classification: G03C

Abstract:
1. A silver halide emulsion comprising silver halide grains each of which are covered with at least two dye layers in combination, wherein the at least two dye layers comprising: (a) an inner dye layer adjoining to the silver halide grain, and containing at least one kind of spectrally sensitizing dye capable of spectrally sensitizing silver halide, and (b) an outer dye layer adjoining to the inner dye layer (a), and containing at least two kinds of dyes, and wherein the light absorption energy of the outer dye layer is equal to or higher than the light absorption energy of the inner dye layer, an energy-releasing wavelength of the outer dye layer overlaps with an energy-absorbing wavelength of the inner dye layer, the spectrally sensitizing dyes constituting the inner dye layer include an anion dye and/or a betaine dye, the at least two kinds of dyes constituting the outer dye layer include an anion cyanine dye and a cation dye, and the anion cyanine dye in the outer dye layer is more than the cation dye in the outer dye layer in terms of an addition amount and/or an adsorption amount and the net charge of the cation dye of the outer layer is +2 or more.