Patent ID: 6251577
Filing Date: 2001-06-26
Classification: G03C

Abstract:
A method for producing a silver halide photographic emulsion comprising a step of spectrally sensitizing a silver halide photographic emulsion, wherein the emulsion contains tabular silver halide grains having an aspect ratio of 3 or more in an amount of 50% or more of the total projected area of all the silver halide grains in the emulsion; the spectral sensitization is performed by adding a cyanine dye in an amount of 60% or more of the saturated covering amount of the silver halide grains in the emulsion; and the emulsion is produced in the presence of (a) 400 to 2,500 ppm of calcium ions and 50 to 2,500 ppm of magnesium ions, or (b) 50 to 2,500 ppm of magnesium ions.