# US 5,705,325 A · Silver halide photographic light-sensitive material

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- Number: US 5,705,325 A
- Document ID: US5705325A
- Status: Granted
- Kind: A
- Application number: 08/717,889
- Filed: 1996-09-23
- Granted: 1998-01-06
- Earliest claimed: 1995-09-26
- Assignees: Konica Corporation
- Inventors: Yuji Hosoi
- Web page: https://patentgrep.com/patent/US5705325A

## CPC

- G03C 1/795: the base being of macromolecular substances (G03C1/775 takes precedence)
- G03C 1/005: Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein (catalytic amounts of silver halide in dry silver systems {or thermographic systems using noble metal compounds} G03C1/494)
- G03C 1/0051: {Tabular grain emulsions}
- G03C 1/46: having more than one photosensitive layer {(G03F7/0952 takes precedence)}
- G03C 1/91: characterised by subbing layers or subbing means
- G03C 5/16: X-ray, infrared, or ultraviolet ray processes
- G03C 2001/0055: {Aspect ratio of tabular grains in general; High aspect ratio; Intermediate aspect ratio; Low aspect ratio}
- G03C 2200/28: Gelatine-silver ratio
- Y10S 430/14: Dimensionally stable material
- Y10S 430/167: X-ray
- 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)
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

## Abstract

A silver halide photographic light sensitive material comprising a support and at least two silver halide emulsion layers on each surface of the support, wherein 50% or more of said support are comprised of a syndiotactic polystyrene and a silver to binder ratio of the silver halide emulsion layer closest to said support is lower than that of another silver halide emulsion layer on each side of said support.

## Claims

### Claim 1

A silver halide photographic light sensitive material comprising a support and at least two silver halide emulsion layers comprising silver halide grains and a binder on each surface of the support, 50% or more of said support being comprised of a syndiotactic polystyrene, wherein a silver to binder ratio by weight of the silver halide emulsion layer closest to said support is lower than that of another silver halide emulsion layer on each side of said support.

### Claim 2 (depends on 1)

The silver halide photographic light sensitive material of claim 1, wherein said silver to binder ratio by weight in the emulsion layer closest to a support is not less than 0.05 lower than that of another emulsion layer on each side of said support.

### Claim 3 (depends on 2)

The silver halide photographic light sensitive material of claim 2, wherein said silver to binder ratio by weight in the emulsion layer closest to a support is not less than 0.1 lower than that of another emulsion layer on each side of said support.

### Claim 4 (depends on 1)

The silver halide photographic light sensitive material of claim 1, wherein said binder is gelatin.

### Claim 5 (depends on 2)

The silver halide photographic light sensitive material of claim 2, wherein a subbing layer is provided between the support and the silver halide emulsion layer.

### Claim 6 (depends on 1)

The silver halide photographic light sensitive material of claim 1, wherein said silver halide grains are tabular silver halide grains having an aspect ratio of 2 to 10.

### Claim 7 (depends on 1)

The silver halide photographic light sensitive material of claim 1, wherein said silver to binder ratio by weight of the highest sensitive silver halide emulsion layer is lower than that of another emulsion layer on each side of said support.