Agfa-gevaert Ag

Agfa Gevaert Nv

Bayer Aktiengesellschaft

Hans Vetter

Heinrich Odenwalder

Walter Puschel

Wilhelmus Janssens

Paul Marx

Peter Bergthaller

Christian C Van De Sande

Luc J Vanmaele

Erwin Ranz

Armand M Van Den Bergh

Thomas Kruger

Jan Jaeken

Immo Boie

Hans Hlschlager

Lothar Rosenhahn

Reinhart Matejec

Manfred Peters

Kaspar Wingender

Werner Liebe

Andre Verhecken

Dirk Hubner

Friedhelm Sommer

Arnfried Melzer

Bernhard Morcher

Rigobert Otto

A color photographic recording material comprising at least one blue-sensitive silver halide emulsion layer containing at least one yellow coupler, at least one green-sensitive silver halide emulsion layer containing at least one magenta coupler and at least one red-sensitive silver halide emulsion layer containing at least one cyan coupler and typical intermediate and protective layers, in which the silver halide coating of all the photosensitive layers, expressed as AgNO.sub.3, amounts to no more than 0.3 g/m.sup.2 and the color-coupler-containing layers contain at least one p-phenylenediamine compound containing at least one primary amino group and at least one ballast group dissolved in hydrophobic oil droplets, can be developed in an environment-friendly manner using an intensifying bath.

Color photographic recording material

Couplers corresponding to formula I below used in multilayer color photographic recording materials are suitable for the release of photographically active compounds. ##STR1## In formula I above, A represents the residue of a coupler which, as a consequence of a reaction with the oxidation product of a silver halide developer under the photographic development conditions, releases a radical corresponding to the following formula ##STR2## Time represents a bond which, on reaction of the coupler with the oxidation product of a silver halide developer, is released together with the triazole ring attached thereto and, in turn, releases the triazole ring with delay under the development conditions;

Color photographic recording material containing a coupler which

A ballasted non-diffusing compound that is capable of releasing a diffusible particularly light-fast azo dye from a carrier moiety, characterized in that said compound corresponds to the following general formula:

Organic compounds for use in a dye diffusion transfer process and

Good edge effects and inter-image effects are obtained where DIR couplers corresponding to formula I are used in color photogrpahic silver halide materials. ##STR1## in which R.sup.1 is H, Cl, --CF.sub.3, alkoxy, sulfamoyl;

Color photographic recording material containing a DIR coupler

Highly active silver halide development inhibitors are released from DIR couplers corresponding to formula I during color development. Where DIR couplers are used in color photographic silver halide materials, high edge effects and high inter-image effects are obtained.

The invention relates to a photographic recording material comprising a layer support and, arranged thereon, at least one photosensitive silver halide emulsion layer which contains an antifogging agent corresponding to formula (I) ##STR1## in which A, R.sub.1 and R.sub.2 are as defined in the specification. The antifogging agents according to the invention reduce fogging without significantly affecting gradation and improve the staility of the photographic material in storage.

Photographic recording material

Dye releasing compounds which release dyes corresponding to formula I ##STR1## wherein R.sup.1 denotes alkyl, aryl, arylamino, alkoxy or aryloxy,

Colour photographic recording material containing a dye releasing

A ballasted non-diffusing compound that is capable of releasing a diffusible particularly light-fast azo dye from a non-diffusible carrier moiety, wherein said compound contains not more than two aromatic nuclei between said carrier moiety and a dye part that remaining linked to said aromatic nuclei is releasable by redox-reaction and wherein at least one of said aromatic nuclei is substituted with a R.sup.4 SO.sub.2 NH-- group as defined.

Azo dye compounds for use in a dye diffusion transfer process and

The stability to light of images produced from magenta couplers is improved by a combination of a hydroquinone and an indole.

Color photographic recording material and a process for the production

Photographic silver halide emulsion material for use in a dye diffusion transfer process incorporating a non-diffusing compound capable of releasing a diffusible mono-azo dye or dye precursor thereof from a carrier moiety, said compound corresponding to the following general formula (I):

Ballasted dye compounds with linkages containing three aromatic nuclei

Electron donor compounds of the formula I are effective to reduce non-diffusing reducible color providing compounds which when reduced release under the photographic development conditions a diffusible dye.

Color photographic recording material containing non-diffusing electron

A compound of the following formula and use of this compound in a photographic material and a photographic diffusion transfer process for the production of color images: ##STR1## wherein R represents a hydrogen atom or an alkyl group with 1 to 4 C atoms;

Photographic diffusion transfer process and material for the production

In a color photographic material wherein by color development there are produced either non-diffusing image dyes or diffusing image dyes (the latter being transferred to an image-receiving layer) the color development is controlled by means of non-diffusing thioether compounds which on color development release a diffusing mercapto compound but do not themselves form a dye. The mercapto compound inhibits the development of the silver halide and the thioether compound has the formula ##STR1## R.sub.1 =hydrogen or alkyl with 1-3 carbon atoms R.sub.2 =alkyl with up to 22 carbon atoms the group --S--Y is split off during color development and forms a mercaptane, e.g. 5-mercapto-1-phenyltetrazole, which inhibits the development.

Light-sensitive color photographic material

For the production of cyan and magenta images by the dye diffusion transfer process dye-providing compounds of the formula I are suitable ##STR1## in which A=an oxydizable carrier residue containing a diffusion-preventing radical;

Photographic dye diffusion transfer process

Useful non-diffusible dye-giving compounds for the photographic dye diffusion transfer process are dye sulfonamides derived from enolamines or endiamines or tautomers thereof. The dye-giving compounds are oxidized by developer oxidation products and subsequently split under the conditions of alkaline development to release diffusible dyes. The compounds are of the following formula ##STR1## in which X is a dye moiety and R.sub.1, R.sub.2 and R.sub.3 have meanings given hereinafter.

Growing community of inventors

Cologne, Germany

Hans Vetter