Claims
- 1. In a photographic element for the color diffusion transfer process including a neutralizing system for reducing the pH of an aqueous alkaline developing solution which comprises a neutralizing layer and a timing layer, wherein the timing layer is positioned on or under the neutralizing layer in direct or indirect contact therewith such that the aqueous alkaline developing solution reaches the neutralizing layer through the timing layer, the improvement which comprises a timing layer comprising a polymer which is produced by emulsion polymerization of (1) each of (A) at least one monomer selected from the group consisting of ethylene-type monomers having at least one free carboxylic acid group, free sulfonic acid group or free phosphoric acid group or a salt thereof, (B) at least one monomer selected from the group consisting of monomers represented by the following general formula (I) ##STR12## wherein X is a hydrogen atom, a methyl group or a --COOR.sup.1 group; Y is a hydrogen atom, a methyl group or a --(CH.sub.2).sub.n COOR.sup.2 group; Z is a monocyclic or bicyclic aryl group having 6 to 12 carbon atoms, a --COOR.sup.3 group or a ##STR13## R.sup.1, R.sup.2 and R.sup.3, which may be the same or different, each represents a saturated aliphatic group having 1 to 12 carbon atoms or a monocyclic or bicyclic aryl group having 6 to 12 carbon atoms; and n is an integer of 0 to 3, and (C) at least one monomer selected from the group consisting of ethylene-type monomers having at least one glycidyl group or (2) each of (A) at least one monomer selected from the group consisting of the ethylene-type monomers described in (A) above, (B) at least one monomer selected from the group consisting of monomers represented by the general formula (I) above, (C) at least one monomer selected from the group consisting of the ethylene-type monomers described in (C) above, and (D) at least one monomer selected from the group consisting of monofunctional or polyfunctional unsaturated monomers other than those monomers described in (A), (B) and (C) above which are copolymerizable with the monomers described in (A), (B) and (C) above and selected from the group consisting of acrylamides, methacrylamides, vinyl ethers, vinyl ketones, allyl compounds, olefins, vinyl heterocyclic compounds, unsaturated nitriles and polyfunctional monomers, and the polymer latex layer per se has the water permeability.
- 2. The photographic element of claim 1, wherein said photographic element is a cover sheet for a color diffusion transfer photographic material.
- 3. The photographic element of claim 1, wherein the photographic element is a laminate integral color diffusion transfer film unit which comprises
- a photosensitive member comprising an image receiving element and a photosensitive element coated in turn on a support,
- a cover sheet including said neutralizing system, and
- a processing element comprising an aqueous alkaline processing solution capable of being spread between said photosensitive element and said cover sheet.
- 4. The photographic element of claim 3, wherein said elements are strippable elements.
- 5. The photographic element of claim 3, wherein said photosensitive element contains at least one silver halide photographic emulsion layer and a dye image forming material associated therewith.
- 6. The photographic element of claim 5, wherein said dye image forming material is present in a layer adjacent said photographic emulsion layer.
- 7. The photographic element of claim 5, wherein said dye image forming material is a compound capable of being oxidized by an oxidation product of a developing agent and releasing a diffusible dye.
- 8. The photographic element of claim 5, wherein said photographic emulsion is a direct reversal photographic emulsion.
- 9. The photographic element of claim 8, wherein said direct reversal photographic emulsion is an internal latent image type direct reversal photographic emulsion.
- 10. The photographic element of claim 9, wherein the internal latent image type emulsion is an internal latent image type emulsion comprising a core and a shell.
- 11. The photographic element of claim 7, wherein said photographic material includes a direct reversal photographic emulsion layer and said dye image forming material is combined with said direct reversal photographic emulsion layer.
- 12. The photographic element of claim 1, wherein said polymer latex of said timing layer is a latex free of water-soluble materials other than surface active agents, either during preparation of said latex or said timing layer.
- 13. The photographic element of claim 1, wherein said neutralizing system has a T.sub.15 /T.sub.25 value in percent ranging from about 250% to about 600%, wherein T.sub.15 is the time required for reducing the pH of the alkaline processing solution to 10.degree. at 15.degree. C. and T.sub.25 is the period of time required for reducing the pH of the alkaline processing solution to 10.degree. at 25.degree. C.
- 14. The photographic element of claim 13, wherein the T.sub.15 /T.sub.25 value in percent range from 300 to 500%.
- 15. The photographic element of claim 1, wherein said monomer represented by the general formula (I) is styrene.
- 16. The photographic element of claim 1, wherein said monomer represented by the general formula (I) is butyl acrylate.
- 17. The photographic element of claim 1, wherein said monomer represented by the general formula (I) is butylmethacrylate.
- 18. The photographic element of claim 1, wherein said monomer (C) is glycidyl acrylate.
- 19. The photographic element of claim 1, wherein said monomer (C) is glycidyl methacrylate.
Priority Claims (1)
Number |
Date |
Country |
Kind |
52-144749 |
Dec 1977 |
JPX |
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Parent Case Info
This application is a continuation-in-part application of Ser. No. 966,407, filed Dec. 4, 1978, now abandoned.
US Referenced Citations (6)
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
966407 |
Dec 1978 |
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