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 Silver halide photographic light-sensitive materials

Details
Inventors: Sugimoto, Tadao; Ikeda, Hideo;
Assignee: Fuji Photo Film Co., Ltd. (Kanagawa, JP)
Primary Examiner: Louie; Won H.
Assistant Examiner:
Attorney, Agent or Firm: Sughrue, Mion, Zinn, Macpeak and Seas

A silver halide photographic light-sensitive material is disclosed. The material is comprised of a support base having positioned thereon a silver halide emulsion layer and a protective layer. The silver halide emulsion layer includes at least two component layers including an upper layer and a lower layer. The upper layer is comprised of a photosensitive silver halide emulsion and the lower layer is comprised of a photosensitive silver halide emulsion and an inside fogged silver halide emulsion. The particle size of the inside fogged silver halide emulsion is smaller than that of the photosensitive silver halide emulsion in the upper layer and the lower layer. The material is highly sensitive and forms images which have high contrast and high density. The material is capable of forming images having a pure black tone. When the materials are processed they create substantially no stain even if a stopping bath is not utilized.

DETAILED DESCRIPTION Accordingly, an object of the present invention is to provide highly sensitive silver halide photographic light-sensitive materials which form images having high contrast and high maximum density.
Another object of the present invention is to provide silver halide photographic light-sensitive materials having improved granularity which form images having a pure black tone.
A further object of the present invention is to provide silver halide photographic light-sensitive materials which create substantially no stain even if the stopping bath is not used.
As a result of earnest studies, the present inventors have found that the above-described objects can be attained by the following photographic light-sensitive materials.
Namely, they can be attained by silver halide photographic light-sensitive materials comprising a silver halide emulsion layer and a protective layer provided on a base in turn.
The silver halide emulsion layer is composed of at least two layers consisting of an upper layer and a lower layer.
The upper layer contains a photosensitive silver halide emulsion, and the lower layer contains a photosensitive silver halide emulsion and an inside fogged silver halide emulsion.
The particle size of the inside fogged silver halide in the lower layer is smaller than that of the photosensitive silver halide in the upper layer and that of the photosensitive silver halide in the lower layer.



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