Photographic materials containing polysaccharides

• US 5,229,246 A
• Filed: 02/19/1991
• Issued: 07/20/1993
• Est. Priority Date: 02/20/1990
• Status: Expired due to Term

• Current Assignee: Fujifilm Corporation (Fujifilm Holdings Corporation)
• Original Assignee: Fuji Photo Film Co Limited (Fujifilm Holdings Corporation)
• Inventors: Shibata, Takeshi, Yokokawa, Takuya
• Primary Examiner(s): Schilling, Richard L.
• Application Number:
  US07/656,529
• Time in Patent Office: 882 Days
• Field of Search: 430/203, 430/213, 430/216, 430/215, 430/217, 430/639, 430/640, 430/935, 430/214, 430/212
• US Class Current: 430/217
• CPC Class Codes: G03C 1/04 with macromolecular additives; with layer-forming substances
• CPC Class Codes: G03C 8/08 the substances transferred by diffusion consisting of organic compounds G03C8/04 takes precedence
• CPC Class Codes: G03C 8/52 Bases or auxiliary layers; Substances therefor
• CPC Class Codes: Y10S 430/136 Coating process making radiation sensitive element

Abstract

A diffusion transfer photographic material is disclosed, which comprises a support having thereon at least a photosensitive element comprising a photosensitive silver halide emulsion and a diffusible dye donating compound, and a dye fixing element which is placed upon the said photosensitive element at the time of image transfer, wherein a natural macromolecular polysaccharide originating from red algae is included in said photosensitive element and/or in said dye fixing element, and a process of producing a diffusion transfer photographic material is disclosed, which comprises the step of using a coating liquid which contains a water soluble polymer solution comprising a natural macromolecular polysaccharide, a hydrophilic organic solvent in which the said water soluble polymer is essentially insoluble and water.

Claims

1. A diffusion transfer photographic material comprising a support having thereon at least a photosensitive element comprising a photosensitive silver halide emulsion and a diffusible dye donating compound, and a dye fixing element which is adapted to be placed upon said photosensitive element at the time of image transfer, wherein a natural macromolecular polysaccharide originating from red algae is included in a protective layer coated over a dye fixing layer of said dye fixing element.

2. A diffusion transfer photographic material as in claim 1 wherein the natural macromolecular polysaccharide originating from red algae is a natural macromolecular polysaccharide selected from among agar, κ

-carrageenan, λ

-carrageenan, ι

-carrageenan and phaeceleran.

3. A diffusion transfer photographic material as in claim 1, wherein the photosensitive element further comprises a binder, an electron transfer agent, an electron donor, and a reducible dye donating compound which releases a diffusible dye on reduction.

4. A diffusion transfer photographic material as in claim 3 wherein at least one photosensitive silver halide emulsion is a gold/sulfur sensitized mono-disperse emulsion.

5. A diffusion transfer photographic material as disclosed in claim 3 wherein at least one photosensitive silver halide emulsion has a sensitizing dye adsorbed before chemical sensitization.

6. A process of producing a diffusion transfer photographic material comprising a support having thereon at least a photosensitive element comprising a photosensitive silver halide emulsion and a diffusible dye donating compound, and a dye fixing element which is adapted to be placed upon said photosensitive element at the time of image transfer, which comprises the step of coating a coating liquid which comprises a natural macromolecular polysaccharide originating from red algae, a hydrophilic organic solvent in which the polysaccharide is essentially insoluble and water, onto a dye fixing layer of said dye fixing element to form a protective layer.