Agfa-gevaert Ag

Agfa Gevaert Nv

Wolfgang Lassig

Ernst Meier

Karl-Wilhelm Schranz

Karl Kuffner

Siegfried Schleger

Erwin Ranz

Hans-Heinrich Credner

Hans Heinrich Credner

Wilhelmus Janssens

Immo Boie

Christian C Van De Sande

Paul Marx

Helmut Haseler

Gertrud Kirchhoff

Herbert Stark

Marcel Nicolas Vrancken

Fritz Benker

Compounds corresponding to the formula: ##STR1## wherein Z represents a radical which completes a condensed aromatic ring system;

Color-photographic recording material containing non-diffusing electron

A photographic material for diffusion transfer photography containing a quinonoid compound, which is capable in reduced state and under alkaline conditions of releasing a photographically useful group and corresponds to one of the following general formulae: ##STR1## wherein: each of (Nuox).sup.1 and (Nuox).sup.2 (same or different) represents an oxidized nucleophilic group,

Photographic material suited for use in diffusion transfer photography

Sulfilimine compounds of formula I ##STR1## in which R.sup.3 is the residue of a diffusible photographically active compound can be split reductively to release the residue together with a group --SO.sub.2 --NH.sub.2. When R.sup.3 represents the radical of a dye or dye precursor the sulfilimines are useful as color providing compounds in dye diffusion transfer processes.

Photographic recording material for diffusion processes and useful

5- or 6-membered .alpha.-lactones of phenolic compounds, in which the phenyl ring carries a hydroxyl or amino group in its 2- or 4-position to the lactonized phenolic hydroxyl group and in which the lactone ring carries an electron accepting substituent, so that the lactone ring is readily cleavable at pH values of from 10 to 13 to form an electron donor compound (ED-compound) having a redox potential of less than +0.255 V determined against a normal calomel electrode at pH 0 are useful ED precursor compounds for non-diffusing reducible color providing compounds.

Color photographic recording material containing non-diffusing electron

The condensation of an .alpha.-halogen carbonyl compound with carbamic acid esters in the presence of a basic condensing agent and an aprotic solvent enables the production of oxazolinone-2-compounds in a high degree of purity, and in high yields in one step by using simple and readily available starting compounds.

Process for the production of oxazolinone-2-compounds

White couplers which are capable of reacting with color developer oxidation products to form colorless end product with the consumption of four oxidation equivalents and which, therefore have increased absorption capacity for color developer oxidation products correspond to the formula ##STR1## or its tautomeric form, in which R.sup.1 is hydrocarbyl, heterocyclyl attached through a ring carbon, or --CO--R.sup.2 R.sup.2 is alkyl, aryl, alkoxy, amino X is --S-- or --NR.sup.3 -- R.sup.3 is hydrogen, same as represented by R.sup.1 or an electron-attaching group. The four-equivalent white couplers may be contained in processing solutions or, in diffusion resistant form, in one or more layers of a colorphotographic material.

Process for the production of color photographic images using new white

Development inhibitor releasing compounds are thioether compounds capable of releasing on reaction with color developer oxidation products, a diffusible mercaptan that inhibits further development of silver halide. Useful DIR compounds correspond to the formula ##STR1## R.sup.1 represents hydrocarbyl Y represents --S-- or --NR.sup.2 --

Light-sensitive photographic material

Monocyclic oxazolinone-2 structures make good 2-equivalent photographic couplers, the oxazolinone-2 ring splitting during the coupling to form a dye. The couplers can be made by condensing an .alpha.-halocarbonyl compound with an inorganic cyanate in a substantially aprotic solvent that can contain a small amount of water.

Photographic material containing oxazolinone-2 couplers

Oxazolinone-2 derivatives having a releasable mercapto group in their 5-position are provided as development-inhibitor-releasing thioether compounds for use in color photographic material having a high reactivity on chromogenic development of color photographic material, and are very easy to prepare.

A process for reproducing an original having visible light absorptive image markings on a light transparent background by exposing to visible light passing through the original a normally water-removable heat-sensitive recording layer which consists essentially of a hydrophilic water-removable binder having generally homogeneously distributed therethrough finely divided particles of a hydrophobic thermoplastic polymer normally solid at room temperature together with finely divided material capable of absorbing visible light and converting it into heat and is otherwise generally transparent. The exposure is for a time lasting no longer than 10.sup.-.sup.1 second to visible light of an intensity of at least 0.3 watt, sec. per sq.cm. and sufficient to heat the areas of the layer corresponding to the transparent background areas of the original to reduce the water removability thereof but not sufficient to heat the areas of the layer corresponding to the image areas of the original to reduce the water removability thereof. The exposed layer is washed with an aqueous liquid to remove the areas corresponding to the image areas.

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Munich, Germany

Wolfgang Lassig