Silver halide photographic material
AssigneeFuji Photo Film Co., Ltd.
InventorTadashi Ogawa
Life of this patent
Estimating the term…
Loading patent…
AssigneeFuji Photo Film Co., Ltd.
InventorTadashi Ogawa
Estimating the term…
A silver halide photographic material comprising a support having thereon at least one emulsion layer which contains a silver chlorobromide or silver chloride each having an iodide content of 3 mol % or less. The monodispersed emulsion is prepared in a process comprising the steps of, in sequence, forming silver halide grains which have a grain size distribution represented by a variation coefficient of 0.2 or less, causing halogen replacement in silver halide grains by addition of a water-soluble bromide in a proportion of from 0.6 to 20 mol % with respect to the total silver halide in the presence of at least one sensitizing dye selected from among simple cyanine dyes, carbocyanine dyes, and dicarbocyanine dyes at individual surfaces of the silver halide grains, and then subjecting the resulting silver halide grains to chemical sensitization, thereby achieving enhanced sensitivity and improved pressure characteristics.
A silver halide photographic material comprising a support having thereon at least one emulsion layer which contains a silver chlorobromide or silver bromide each having an iodide content of 3 mol% or less, which is prepared in a process comprising the steps of, in sequence, forming silver halide grains which have a grain size distribution represented by a variation coefficient of 0.2 or less, causing halogen replacement in silver halide grains by addition of a water-soluble bromide in a proportion of from 0.6 to 20 mol% with respect to the total silver halide in the presence of at least one sensitizing dye selected from among simple cyanine dyes, carbocyanine dyes, and dicarboncyanine dyes at individual surfaces of the silver halide grains, and then subjecting the resulting silver halide grains to chemical sensitization.
Dependencies are inferred from the claim text.