摘要:
A silver halide color photographic lightsensitive material containing at least one compound capable of increasing photographic speed, the compound having at least three heteroatoms in its molecule, and wherein at least one layer of the silver halide emulsion layers comprises an emulsion, the emulsion consisting of a lightsensitive silver halide emulsion wherein 50% or more in number of all the silver halide grains are occupied by tabular grains having (111) faces as main planes, the tabular grains (i) composed of silver iodobromide or silver chloroiodobromide, (ii) having an equivalent circle diameter of 1.0 μm or more and a thickness of 0.15 μm or less, and (iii) composed of core portions of 0.1 μm or less thickness free of growth ring structure and composed of silver iodobromide and shell portions having ten or more dislocation lines.
摘要:
A process for producing a lightsensitive silver halide emulsion comprising silver halide grains, wherein the emulsion contains tabular silver halide grains in an amount of at least 50% of the total projected area of all the silver halide grains, the average iodine content of all the silver halide grains is at least 2 mol %, and the tabular silver halide grains have at least 10 dislocation lines per grain, wherein the process comprises (step 1) set fourth below, and the process comprises a step of performing chemical sensitization so that a selenium sensitizer is added in an amount of 2.5×10−6 to 5×10−5 mol/mol silver and comprises a step of performing spectral sensitization (step 1) performing the spectral sensitization in which a spectral sensitizer is added in the presence of 50 ppm or less of calcium, magnesium and strontium, followed by adding at least one water-soluble salt of a metal selected from the group consisting of calcium, magnesium and strontium, so that the concentration of calcium, magnesium and strontium becomes 100-2500 ppm, and then the chemical sensitization is started.