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US 5,478,715 AGranted
Silver halide photographic material
AssigneeFuji Photo Film Co., Ltd.
InventorsTomoyuki Ohzeki, Shinji Ikari
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AssigneeFuji Photo Film Co., Ltd.
InventorsTomoyuki Ohzeki, Shinji Ikari
Estimating the term…
A silver halide photographic material comprising a support and a silver halide emulsion layer provided thereon. The silver halide emulsion is prepared by nuclear formation, crystal growth and chemical sensitization. All or a part of the nuclear formation or the crystal growth is conducted in the presence of a hexa-coordinated cyano-complex to introduce the complex into crystal lattice of the silver halide. The density of the hexa-coordinated cyano-complex contained in surface parts of silver halide grains is in the range of 10.sup.-4 to 10.sup.-2 mol per 1 mol of silver. The surface parts of silver halide grains has a thickness of not more than 20.ANG. from the surfaces of the grains. The chemical sensitization is conducted using a gold sensitizer. The silver halide emulsion is prepared using a synthetic polymer as a protective colloid in place of gelatin. In the cases in which gelatin is used, it is present in an amount of not more than 10 g per 1 mol of silver.
A silver halide photographic material which comprises a support and a silver halide emulsion layer provided thereon, wherein the silver halide emulsion is prepared by nuclear formation, crystal growth and chemical sensitization, all or a part of the nuclear formation or the crystal growth being conducted in the presence of a hexa-coordinated cyano-complex to introduce the complex into crystal lattice of the silver halide, the hexa-coordinated cyano-complex contained in surface parts of silver halide grains having a density in the range of 5.times.10.sup.-4 to 10.sup.-2 mol per 1 mol of silver, said surface parts of silver halide grains having a thickness of not more than 20.ANG. from surfaces of the grains, the chemical sensitization being conducted using a gold sensitizer, and the silver halide emulsion being prepared using a synthetic polymer as a protective colloid in place of gelatin which is absent or present in an amount of not more than 10 g per 1 mol of silver.
Dependencies are inferred from the claim text.