Agfa Gevaert Nv

Daniel A Claeys

Wilhelmus Janssens

Raymond Gerard Lemahieu

Daniel M Timmerman

Jozef Aime Dierckx

Luc J Vanmaele

Piet Kok

Eddy A Michiels

Antonius A Rutges

Frans Carael

Alphonse Somers

Daniel, M Timmerman

Phosphonium mordanting polymer comprising randomly distributed recurring units corresponding to the general formula (I) ##STR1## wherein: A represents a unit that is derived from a copolymerizable monomer having a hydrophobic character e.g. acrylonitrile,

Polymeric phosphonium mordant and photographic element containing the

Phosphonium mordanting polymer, that is capable of fixing acid dyes and that comprises randomly distributed recurring units corresponding to the general formula (I) ##STR1## wherein: A represents a unit that is derived from a copolymerizable monomer capable of quenching singlet oxygen e.g. N-vinylimidazole or 2-methyl-1-vinylimidazole;

The present invention provides a dye diffusion transfer imaging process comprising transferring image-wise by diffusion an acid dye to an image-receiving layer incorporating a non-polymeric phosphonium mordanting agent and a copolymer latex comprising free weak acid groups as a stabilizer for the mordanting agent, wherein the image-wise transfer of said acid dye is performed in the presence of a heterocyclic compound corresponding to one of the following general formulae I, II, and III: ##STR1## wherein: Y represents the non-metallic atoms needed to complete a saturated or unsaturated 5- or 6-membered heterocyclic nucleus, which may carry a fused-on aromatic ring system, and M represents hydrogen, an alkali metal atom, a quaternary ammonium group, or a negative charge forming an inner salt with a quaternized nitrogen atom of the heterocyclic compound. The invention also provides an image receptor element for dye diffusion transfer imaging processes comprising a support and such image-receiving layer.

Dye diffusion transfer imaging process and image receptor used therein

A photographic color diffusion transfer process comprising the steps:

Process for the production of a photographic color image by image-wise

A process for the production of a multi-color dye image by dye diffusion transfer operating with a photographic multilayer multi-color material containing different non-diffusing dyes or dye precursor compounds that when contacted with an aqueous alkaline liquid remain immobile in an alkali-permeable colloid layer but are capable of being reduced by a developing agent at a rate slower than the reduction of image-wise developable silver halide and in reduced state under alkaline conditions are capable of releasing a diffusible dye or dye precursor moiety, and wherein as illustrated in the drawing dye images with higher color saturation are obtained by more extensive oxidation of developing agent in the image-wise photo-exposed area due to the use in the alkaline processing liquid of a silver halide solvent forming an alkali-soluble and reducible silver complex compound.

Process for the production of a multicolor image by image-wise dye

A dye-diffusion transfer process for producing (a) dye image(s) with improved dye density is provided, said process comprising the steps of:

Dye-diffusion transfer process

Receptor material adapted for use in a combined dye transfer and silver complex diffusion transfer process, comprising in order:

Non-photosensitive receptor material suited for producing

A photographic material for the production of multicolor images by means of diffusion transfer of complexed silver halide which includes a support having thereon at least three differently spectrally sensitive silver halide emulsion layers that are each sensitive to light of a different additive primary color, associated with each silver halide emulsion layer a silver precipitating layer containing development nuclei and a different dye-releasing compound for producing a subtractive multicolor image, and optionally one or more non-light-sensitive, non dye-releasing water-permeable hydrophilic colloid interlayers. In this material for better color separation the layers are arranged in a special order including the juxtaposition of two of the emulsion layers or separation thereof by layers penetrated by complexed silver halide so that the emulsion layers act as barriers against cross-diffusion.

Photographic material suited for the production of multicolor images by

A thermographic recording process in which a dye is produced by bringing image-wise into reactive contact with the aid of heat an organic acid-reacting compound with a dye precursor compound corresponding to the following general formula:

Thermographic process of producing an image

A thermographic recording process in which a dye is produced by bringing image-wise into reactive contact with the aid of heat a dye precursor compound and a compound with acid reaction corresponding to the following general formula: ##EQU1## wherein : Z represents the necessary atoms to close an unsubstituted benzene nucleus, a halogen-substituted benzene nucleus or a nitro-substituted benzene nucleus, and

Thermographic recording material

A thermographic recording process in which a methine dye is produced by bringing image-wise into reactive contact with the aid of heat an acid-reacting compound with a dye precursor compound corresponding to the following general formula: ##EQU1## wherein: R.sub.1 represents (1) a substituted aryl group, at least one substituent of the substituted aryl group being an ether group R.sub.6 --O-- in which R.sub.6 represents a hydrocarbon group including a substituted hydrocarbon group or (2) a heterocyclic group including a substituted heterocyclic group,

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Mortsel, Belgium

Daniel A Claeys