# US 5,348,846 A · Silver halide photographic photosensitive material

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- Number: US 5,348,846 A
- Document ID: US5348846A
- Status: Granted
- Kind: A
- Application number: 07/931,491
- Filed: 1992-08-21
- Granted: 1994-09-20
- Earliest claimed: 1990-02-15
- Assignees: Mitsubishi Paper Mills Limited
- Inventors: Kunihiro Nakagawa; Seiichi Sumi; Hideaki Baba
- Web page: https://patentgrep.com/patent/US5348846A

## CPC

- G03C 1/8155: {Organic compounds therefor}
- G03C 5/16: X-ray, infrared, or ultraviolet ray processes
- G03C: PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES (for photomechanical purposes G03F); PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY (photographic processes characterised by the use or manipulation of apparatus classifiable per se in subclass G03B, see G03B; photomechanical production of textured or patterned surfaces G03F; electrophotography, magnetography G03G)

## Abstract

The present invention provides a silver halide photographic photosensitive material which comprises a transparent support and a silver halide emulsion photosensitive layer provided thereon and a non-photosensitive layer on another side of the support on which the photosensitive layer is not provided, wherein both the photosensitive layer and the non-photosensitive layer contain dyes respectively and transmission density at 350-400 nm of the dye in the photosensitive layer is 0.15 or less and transmission density at 350-400 nm of the dye in the non-photosensitive layer is 0.40 or more.

## Claims

### Claim 1

A silver halide photographic photosensitive element comprising:
a transparent support;
a silver halide emulsion photosensitive layer provided on one side of said transparent support, said photosensitive layer including a first dye in an amount sufficient to provide a transmission density of said photosensitive layer ranging from 0.05 to 0.15 at 350-400 nm; and
a non-photosensitive colloid layer provided on another side of said transparent support, said non-photosensitive layer including a second dye in an amount sufficient to provide a transmission density of said nonphotosensitive layer of 0.40 or more at 350-400 nm.

### Claim 2 (depends on 1)

A silver halide photographic photosensitive element according to claim 1, wherein said second dye is present in an amount sufficient to provide substantial absorption for the whole region of 350-600 nm, a transmission density of said nonphotosensitive layer at 550 nm is 0.5 or more, and transmission densities of said nonphotosensitive layer at 500 nm and 600 nm are 30% or more of said transmission density at 550 nm.

### Claim 3 (depends on 1)

A silver halide photographic photosensitive element according to claim 1, wherein said first and second dyes are selected from the group consisting of azo dyes and oxonol dyes.

### Claim 4 (depends on 1)

A silver halide photographic photosensitive element according to claim 1, wherein said photographic photosensitive element is handled under roomlight.