# US 5,705,328 A · Silver halide photographic light-sensitive material

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 5,705,328 A
- Document ID: US5705328A
- Status: Granted
- Kind: A
- Application number: 08/701,357
- Filed: 1996-08-22
- Granted: 1998-01-06
- Earliest claimed: 1995-08-30
- Assignees: Konica Corporation
- Inventors: Shigeru Shiozaki
- Web page: https://patentgrep.com/patent/US5705328A

## CPC

- G03C 1/795: the base being of macromolecular substances (G03C1/775 takes precedence)
- 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

A silver halide photographic light sensitive material comprises a support and provided thereon, a silver halide emulsion layer, the support comprising a syndiotactic polystyrene, wherein the support has a temperature expansion coefficient of not more than 50.times.10.sup.-6 /.degree.C. and a humidity expansion coefficient of not more than 15.times.10.sup.-6 /% RH.

## Claims

### Claim 1

A silver halide photographic light sensitive material comprising a support and provided thereon, a silver halide emulsion layer, the support comprising a syndiotactic polystyrene, wherein the support has a thermal expansion coefficient of not more than 50.times.10.sup.-6 /.degree.C. a hygroscopic expansion coefficient of not more than 15.times.10.sup.-6 /% RH, and a refractive index which does not exceed 1.585.

### Claim 2 (depends on 1)

The material of claim 1, wherein the support has a thermal expansion coefficient of not more than 50.times.10.sup.-5 /.degree.C. and a hygroscopic expansion coefficient of not more than 1.times.10.sup.-6 /% RH.

### Claim 3 (depends on 1)

The material of claim 1, wherein the support has a refractive index in a thickness direction of not more than 1.625.

### Claim 4 (depends on 1)

The material of claim 1, wherein density of the support is not more than 1.05 g/cm.sup.3.

### Claim 5 (depends on 3)

The material of claim 3, wherein the refractive index difference in a thickness direction between both surfaces of the support is 4.times.10.sup.-3 or less.

### Claim 6 (depends on 1)

The material of claim 1, wherein haze of the support is 1.2% or less.

### Claim 7 (depends on 1)

The material of claim 1, wherein the support is subjected to heat treatment at 40.degree. C. to a temperature not more than Tg of the support for 0.1 to 1,500 hours.

### Claim 8 (depends on 1)

The material of claim 1, wherein the heat absorption amount of an endothermic peak of the support is 50 to 1,000 mcal/g, said peak producing at the temperature range including Tg.

### Claim 9 (depends on 1)

The material of claim 1, wherein the support is surface treated and the surface has a surface having a contact angle with water of 65.degree.or less.

### Claim 10 (depends on 1)

The material of claim 1, wherein the number of foreign matters having a size of 40 .mu.m or more on the support is substantially 0 per 75 square centimeter and the number of foreign matters having a size of from less than 40 .mu.m to 10 .mu.m on the support is 50 or less per 750 square centimeter.

### Claim 11 (depends on 1)

The material of claim 1, wherein the support is firstly oriented by 2.7 to 5 times length at a temperature necessary to obtain an refractive index in a direction perpendicular to the first orientation in the plane of 1.597 or more, and then secondly oriented by 1.2 to 4.5 times length at a temperature of 70.degree. C. to less than 105.degree. C.

### Claim 12 (depends on 1)

The material of claim 1, wherein the support has the following relation:
Et.sup.3 .gtoreq.340
wherein E represents Young's modulus (kgf/mm.sup.2) and t represents a thickness (.mu.m) of the support.

### Claim 13 (depends on 1)

The material of claim 1, wherein the support has a center line average roughness (R.sub.a) of 0.008 .mu.m or less and has a haze of 1.2% or less.