# US 4,399,214 A · Process for hardening color photographic silver halide emulsion layers

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- Number: US 4,399,214 A
- Document ID: US4399214A
- Status: Granted
- Kind: A
- Application number: 06/199,359
- Filed: 1980-10-21
- Granted: 1983-08-16
- Earliest claimed: 1977-12-30
- Assignees: Agfa-Gevaert
- Inventors: Karl Lohmer
- Web page: https://patentgrep.com/patent/US4399214A

## CPC

- G03C 1/79: Macromolecular coatings or impregnations therefor, e.g. varnishes
- G03C 1/305: {containing a diazine or triazine ring}
- 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

In a process for hardening gelatine containing layers of color photographic multi-layered materials which have a paper laminated with a polyolefin layer arranged on both sides a substrate 1,3,5-triacrylohexahydro-1,3,5-triazine and a polyhydric aliphatic alcohol with 3 to 10 carbon atoms are added to the casting solutions and the casting solutions are then applied to a corona irradiated surface of the substrate.

## Claims

### Claim 1

In a process for hardening gelatin for color photographic material which comprises; corona irradiating the surface of a substrate layer support comprised of a cellulose paper which is laminated with a layer of polyolefin on both sides to form an inner paper, said inner paper having an equilibrium moisture of 30-60% relative humidity, casting at least one gelatin-containing color component silver halide emulsion layer associated with a supported gelatin layer on said support, the improvement of adding to a casting solution for at least one layer for application, a solution consisting essentially of gelatin, a hardening solution of 0.4 to 0.8% by weight, based on gelatin, of 1,3,5-triacrylohexahydro-1,3,5-triazine and a polyhydric aliphatic alcohol with from 3 to 10 carbon atoms in an amount of 2 to 20 times the quantity of the hardener by weight on said support.

### Claim 2 (depends on 1)

A process as claimed in claim 1, in which the polyhydric alcohol is glycerol or 1,1,1-trimethylol propane.

### Claim 3 (depends on 1)

A process as claimed in claim 1 in which the layer of polyolefin is polypropylene, polyethylene or a mixture thereof.