Patent ID: 6844146

Claim:
A silver halide color photosensitive material having at least one blue-sensitive silver halide emulsion layer containing a yellow coupler, at least one green-sensitive silver halide emulsion layer containing a magenta coupler, at least one red-sensitive silver halide emulsion layer containing a cyan coupler, and at least one non-lightsensitive layer, on a support, wherein at least one of the layers contains a compound selected from the group consisting of compounds of type A and compounds of types 1 to 4, and at least one of the layers contains the following Compound (B): (Type A) a compound represented by X—Y, wherein X represents a reducing group, Y represents a split-off group, and wherein a one-electron oxide product thereof generated by one-electron-oxidation of the reducing group represented by X is capable of leaving Y to generate an X radical accompanying a subsequent cleavage reaction of X—Y bonding, and is capable of releasing another electron; (Type 1) a compound capable of undergoing a one-electron oxidation to thereby form a one-electron oxidation product thereof, wherein the one-electron oxidation product is capable of releasing further two or more electrons accompanying a subsequent bond cleavage reaction; (Type 2) a compound capable of undergoing a one-electron oxidation to thereby form a one-electron oxidation product thereof, wherein the one-electron oxidation product is capable of releasing further one electron accompanying a subsequent carbon-carbon bond cleavage reaction, and the compound having, in its molecule, two or more groups adsorptive to silver halide; (Type 3) a compound capable of undergoing a one-electron oxidation to thereby form a one-electron oxidation product thereof, wherein the one-electron oxidation product is capable of releasing further one or more electrons after going through a subsequent bond forming process; and (Type 4) a compound capable of undergoing a one-electron oxidation to thereby form a one-electron oxidation product thereof, wherein the one-electron oxidation product is capable of releasing further one or more electrons after going through a subsequent intramolecular ring cleavage reaction; and Compound (B) a compound having at least three hetero atoms, the compound capable of increasing a photographic speed of the photosensitive material in comparison with the case where the material does not contain the compound.