Patent ID: 6180332
Filing Date: 2001-01-30
Classification: G03C

Abstract:
A silver halide photographic emulsion which contains silver halide grains and spectral sensitizing dyes in a total amount equivalent to 160% or more of a saturated coated amount of the silver halide grains; said spectral sensitizing dyes comprising at least one spectral sensitizing dye represented by formula (1) and formula (2) multilayer adsorbed onto a surface of said silver halide grains in an amount equivalent to 80% or more of the saturated coated amount of the silver halide grains: ##STR38##wherein R.sub.11 and R.sub.12 each represents an alkyl group, at least one of R.sub.11 and R.sub.12 is an alkyl group represented by R.sub.13, where R.sub.14 represents a single bond or a divalent linking group and Y.sub.11 represents an aryl group or a heterocyclic aromatic group, and neither R.sub.11 nor R.sub.12 has an anionic substituent; Z.sub.11 and Z.sub.12, which may be the same or different, each represents a 5- or 6-membered nitrogen-containing heterocyclic nucleus-forming atomic group; L.sub.11, L.sub.12, L.sub.13, L.sub.14, L.sub.15, L.sub.16 and L.sub.17 each represents a methine group; p.sub.11 and p.sub.12 each represents 0 or 1, n.sub.11 represents 0, 1, 2 or 3: X.sub.11 represents a counter ion for balancing a charge; and m.sub.11 represents a number of from 0 to 8 necessary for neutralizing a charge in the molecule; ##STR39##wherein R.sub.21 and R.sub.22 each represents an alkyl group, at least one of R.sub.21 and R.sub.22 is an alkyl group represented by R.sub.23, where R.sub.24 represents a single bond or a divalent linking group and Y.sub.21 represents an aryl group or a heterocyclic aromatic group, and both R.sub.21 and R.sub.22 have an anionic substituent; Z.sub.21 and Z.sub.22, which may be the same or different, each represents a 5- or 6-membered nitrogen-containing heterocyclic nucleus-forming atomic group; L.sub.21, L.sub.22, L.sub.23, L.sub.24, L.sub.25, L.sub.26 and L.sub.27 each represents a methine group; p.sub.21 and P.sub.22 each represents 0 or 1: n.sub.21 represents 0, 1, 2 or 3; X.sub.21 represents a counter ion for balancing a charge; and m.sub.21 represents a number of from 0 to 8 necessary for neutralizing a charge in the molecule.