Silver halide color photosensitive material and image forming method

1. A silver halide color photosensitive material, comprising: at least one yellow-color-forming light-sensitive silver halide emulsion layer, at least one magenta-color-forming light-sensitive silver halide emulsion layer, and at least one cyan-color-forming light-sensitive silver halide emulsion layer on a reflective support; and at least one non-light-sensitive non-color-forming hydrophilic colloidal layer,

wherein

at least one of the photosensitive silver halide emulsion layers contains a silver halide emulsion that contains 90 mol % or more of silver chloride; and

a compound having a repetitive unit represented by the following formula (I) is contained:

wherein R 1 represents —OR, —SR, or —N—R(—R′), in which R and R′ each independently represent a hydrogen atom, or an alkyl group, an aryl group, an aralkyl group, a cycloalkyl group, or a heterocyclic group, which may be further substituted, or R and R′ may bond together to form a saturated carbon ring or a heterocycle constructed of an alkylene group including —O—; R 2 and R 3 each independently represent a hydrogen atom or an alkyl group which may be further substituted; Y 1 and Y 2 each independently represent a polymethylene group, an arylene group, or a cycloalkylene group, which may be further substituted; Z represents —O—, —SO 2 —, or —CH 2 —; and m represents 0 (zero) or 1.

2. The silver halide color photosensitive material as claimed in claim 1 , in which the yellow-color-forming light-sensitive silver halide emulsion layer contains a silver halide emulsion which is spectrally sensitized by at least one sensitizing dye represented by the following formula (II):

wherein X 1 and X 2 each independently represent an oxygen atom, a sulfur atom, a selenium atom, a tellurium atom, a nitrogen atom, or a carbon atom; Y 1 represents an atomic group necessary for forming a furan, pyrrole, thiophene, or benzene ring, which may be further condensed with another 5- or 6-membered carbon ring or heterocycle or may have a substituent; Y 2 represents an atomic group necessary for forming a benzene ring or a 5- or 6-membered unsaturated heterocycle, which may be further condensed with another 5- or 6-membered carbon ring or heterocycle or may have a substituent; a bond between two carbon atoms by which Y 1 and Y 2 are each condensed with the carbon ring or the heterocycle may be a single bond or a double bond; one of R 1 and R 2 represents an alkyl group substituted with an acidic group except a sulfo group and the other of R 1 and R 2 represents an alkyl group substituted with a sulfo group; L 1 , L 2 , and L 3 each independently represent a methine group; n 1 represents 0 (zero) or 1; M 1 represents a counter ion; and m 1 represents 0 (zero) or a larger number, which is necessary for neutralizing an electric charge in the molecule.

3. The silver halide color photosensitive material as claimed in claim 2 , wherein n 1 in the formula (II) is 0 (zero).

4. The silver halide color photosensitive material as claimed in claim 2 , in which the sensitizing dye represented by the formula (II) is represented by the following formula (III) or (IV):

wherein Y 11 represents an oxygen atom, a sulfur atom, or N—R 13 , in which R 13 represents a hydrogen atom or an alkyl group; V 15 and V 16 each independently represent a hydrogen atom or a substituent; X 11 and X 12 each independently represent an oxygen atom or a sulfur atom; one of R 11 and R 12 represents an alkyl group substituted with an acidic group except a sulfo group and the other of R 11 and R 12 represents an alkyl group substituted with a sulfo group; V 11 , V 12 , V 13 , and V 14 each independently represent a hydrogen atom or a substituent; M 11 represents a counter ion; and m 11 represents 0 (zero) or a larger number, which is necessary for neutralizing an electric charge in the molecule;

wherein Y 21 represents an oxygen atom, sulfur atom, or N—R 23 ; in which R 23 represents a hydrogen atom or an alkyl group; V 25 and V 26 each independently represent a hydrogen atom or a substituent; X 21 and X 22 each independently represent an oxygen atom or a sulfur atom; one of R 21 and R 22 represents an alkyl group substituted with an acidic group except a sulfo group and the other of R 21 and R 22 represents an alkyl group substituted with a sulfo group; V 21 , V 22 , V 23 , and V 24 each independently represent a hydrogen atom or a substituent; M 21 represents a counter ion; and m 21 represents 0 (zero) or a larger number, which is necessary for neutralizing an electric charge in the molecule.

5. The silver halide color photosensitive material as claimed in claim 2 , in which the sensitizing dye represented by the formula (II) is represented by the following formula (V):

wherein X 31 and X 32 each independently represent an oxygen atom or a sulfur atom; one of R 31 and R 32 represents an alkyl group substituted with an acidic group except a sulfo group and the other of R 31 and R 32 represents an alkyl group substituted with a sulfo group; V 31 , V 32 , V 33 , V 34 , V 35 , V 36 , V 37 , and V 38 each independently represent a hydrogen atom or a substituent, in which two adjacent substituents may bond together to form a condensed ring; M 31 represents a counter ion; and m 31 represents 0 (zero) or a larger number, which is necessary for neutralizing an electric charge in the molecule.

6. The silver halide color photosensitive material as claimed in claim 1 , in which the silver halide emulsion contained in the yellow-color-forming light-sensitive silver halide emulsion layer contains silver iodide at a concentration of 0.02 to 0.5 mol %.

7. The silver halide color photosensitive material as claimed in claim 1 , in which the silver halide emulsion contained in the yellow-color-forming light-sensitive silver halide emulsion layer is composed of crystal grains having a cubic or tetradecahedral structure having a cubic grain volume corresponding to 0.55 μm or less in side length.

8. The silver halide color photosensitive material as claimed in claim 1 , in which the total amount of silver applied on photographic constituent layers is 0.2 g/m 2 or more and 0.46 g/m 2 or less.

9. A method of forming a color image, comprising, after exposure, subjecting the silver halide color photosensitive material as claimed in claim 1 to color development for 20 seconds or less.

10. The silver halide color photosensitive material as claimed in claim 1 , wherein the compound has two or more repetitive units represented by formula (I).

11. The silver halide color photosensitive material as claimed in claim 1 , wherein the compound has two or more but twenty or less repetitive units represented by formula (I).