Silver halide photosensitive material for color-photography and image formation method using the same

A silver halide color photosensitive material for being subjected to color development within nine seconds of being exposed, the material comprising:

• a support;
• and
• a photograph constitution layer provided on the support, and including at least one layer that comprises a yellow dye-forming coupler, at least one layer that comprises a magenta dye-forming coupler, at least one layer that comprises a cyan dye-forming coupler, and at least one non-photosensitive hydrophilic colloid layer,
• wherein the coupler-comprising layers respectively include silver halide emulsions, and at least one of the silver halide emulsions has the following characteristics:
• (i) a silver chloride content of 90 mol % or more, a silver iodide content of 0.02 to 1 mol %, a silver bromide content of 0.1 to 7 mol %, a silver bromide-containing phase is formed in each of 50 to 100% of locations of the volume of a silver halide particle in the silver halide emulsion, and the silver bromide-containing phase is formed further inside of the silver halide particle compared to a silver iodide-containing phase;
• and
• (ii) at least one metal complex represented by general formulae (IB) or (II) is contained therein:
• [IrXIBnLIB(6-n)]m (IB)
• wherein XIB represents a halogen ion or a pseudo-halogen ion;
• LIBrepresents a heterocyclic compound;
• n represents 3, 4, or 5;
• and m represents 5−, 4−, 3−, 2−, 1−, 0, or 1+:
• [MXIInLII(6-n)]m (II)
• wherein M represents Cr, Mo, Re, Fe, Ru, Os, Co, Rh, Pd, or Pt;
• XIIrepresents a halogen ion;
• LIIrepresents an arbitrary ligand which is different from XII;
• n represents 3, 4, 5, or 6;
• and m represents 4−, 3−,2−, 1−, 0, or 1+,
• wherein at least one of the silver halide emulsions in the at least one silver halide emulsion layer that contains the yellow dye-forming coupler comprises a metal complex represented by general formula (IB) and a metal complex represented by general formula (II), wherein at least one of the silver halide emulsions contained in the at least one layer containing the yellow dye-forming coupler has the features (i) and (ii);
• wherein the total amount of silver in the photograph constitution layer in the photosensitive material is in the range from 0.2 g/m2 to 0.45 g/m2.

An image forming method comprising the steps of:

• exposing a silver halide color photosensitive material;
• and
• beginning to subject the exposed silver halide color photosensitive material to a color development within nine seconds of the exposure,
• wherein the silver halide color photosensitive material comprises:
• a support;
• and
• a photograph constitution layer provided on the support, and including at least one layer that comprises a yellow dye-forming coupler, at least one layer that comprises a magenta dye-forming coupler, at least one layer that comprises a cyan dye-forming coupler, and at least one non-photosensitive hydrophilic colloid layer,
• wherein the coupler-comprising layers respectively include silver halide emulsions, and at least one of the silver halide emulsions has the following characteristics:
• (i) a silver chloride content of 90 mol % or more, wherein a silver iodide content of 0.02 to 1 mol % and a silver iodide-containing phase is formed in each of 85 to 100 % of locations of the volume of a silver halide particle in the silver halide emulsion;
• and
• (ii) contains at least one metal complex represented by general formulae (IB) or (II):
• [IrXIBnLIB(6-n)]m (IB)
• wherein XIB represents a halogen ion or a pseudo-halogen ion;
• LIB represents a heterocyclic compound;
• n represents 3, 4, or 5;
• and m represents 5−, 4−, 3−, 2−, 1−, 0, or 1+;
• [MXIInLII(6-n)]m (II)
• wherein M represents Cr, Mo, Re, Fe, Ru, Os, Co, Rh, Pd, or Pt;
• XII represents a halogen ion;
• LIIrepresents an arbitrary ligand which is different from XII;
• n represents 3, 4, 5, or 6;
• and m represents 4−, 3−, 2−, 1−, 0, or 1+,
• wherein at least one of the silver halide emulsions in the at least one silver halide emulsion layer that contains the yellow dye-forming coupler comprises a metal complex represented by general formula (IB) and a metal complex represented by general formula (II),
• wherein at least one of the silver halide emulsions contained in the at least one layer containing the yellow dye-forming coupler has the features (i) and (ii);
• wherein the total amount of silver in the photograph constitution layer in the photosensitive material is in the range from 0.2 g/m2 to 0.45 g/m2.