Agfa-gevaert Ag

Agfa Gevaert Nv

Paul Marx

Peter Bergthaller

Hans Vetter

Walter Puschel

Rudolf Stolzenburg

Werner Berthold

Wulf Von Bonin

Gunter Helling

Heinrich Odenwalder

Rainer Hamprecht

Heinz Meckl

Hans Hlschlager

Holger Heidenreich

Helmut Haseler

Hauke Furstenwerth

Wolfgang Lassig

Karl Kuffner

Andre Verhecken

Arnfried Melzer

Jan Jaeken

Gunther Mahlberg

Hlschlager

Hans Hischlager

Excellent image silver stability is obtained without intermediate washing after fixing and without a special finishing bath by a process for stabilizing a silver image produced by exposure, development and fixing of a photographic material containing at least one silver halide emulsion layer, in which, immediately after fixing, the photographic material is subjected to treatment by a stabilizing bath containing a compound corresponding to general formula (I) ##STR1## in which X=Cl, Br

Process for stabilizing photographic silver images

Photographically produced black and white images (silver images) are stabilized against subsequent destruction of the image silver, in particular due to discoloration, by treating the finished silver image with an aqueous after treatment bath containing aminotetrazole or a mercaptotetrahydrotriazine.

Stabilization of a photographically produced silver image

Cyan partial color images with increased light fastness and improved stability to moisture and heat may be produced by the dye diffusion process using cyan dyes corresponding to formula I released from dye releasing compounds. ##STR1## In the above formula, Q denotes a group for completing a pyridine or pyridazine ring optionally carrying a condensed aromatic ring;

Photographic material containing a pyridine azo or pyridazine azo cyan

Photographically produced black-and-white images (silver images) are stabilized against subsequent destruction of the silver image, in particular against the occurrence of so-called microspot defects, by treatment of the finished silver image with an aqueous after-treatment bath containing an amino-1,2,4-triazole.

Stabilization of a photographically produced silver image using an

Dyes corresponding to formula I may be released imagewise from dye releasers in the dye diffusion transfer process. The dyes obtained are lightfast cyan dyes with improved spectral properties and reduced sensitivity to reducing agents ##STR1## the meanings of symbols given in formula I (A, A', G, R.sup.1, R.sup.2, R.sup.3 and R.sup.4) are indicated in the description.

Color photographic recording material containing a thiophene azo dye

Monoazo dyes corresponding to the following formula ##STR1## are suitable for use as light-stable cyan image dyes stable to reducing agents for the dye diffusion transfer process. In the above formula:

Color photographic recording material containing a thiazole azo dye

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

Compounds corresponding to the formula: ##STR1## wherein R.sup.1 represents an aromatic group, and

Color photographic recording material containing a non-diffusible

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

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

Non-diffusible dye-providing components which may be used in association with a silver halide emulsion layer and on development yield diffusible yellow dyes of improved light fastness are cyanalkyl aminoazo dyes of the formula ##STR1## in which A.sup.1 represents oxidizable carrier residue;

A suitable mordanting polymer for the image receiving layer in a color photographic material for the dye diffusion transfer process is a water-soluble cationic polymer containing glycidyl groups. Such polymers can be made by quaternizing a basic polyurethane, polyurea or polyurea polyurethane of the formula ##STR1## with a quaternizing agent capable of introducing glycidyl groups. The recurring unit contains a quaternizable tertiary amino group, and the recurring unit B is derived from a bis-chloroformate or a diisocyanate.

Light sensitive photographic material containing a mordant layer

In the dye diffusion transfer process for the production of colored images dye-providing compounds of the following formula give lower color fog values Dmin, as compared with known dye-providing compounds: ##STR1## X = dye or dye precursor Z = intermediate member

Non-diffusible dye-providing compounds for the dye diffusion transfer process yielding color images of wanted absorption characteristics and improved light fastness correspond to the formula

In the photographic dye-diffusion transfer process use is made of dye-giving compounds, which are non diffusing in photographic binder layers, and which during development if oxidized imagewise in accordance with the silver halide developed are split owing to the alkali of the developer composition to release diffusing dyes, which are transferred to an image-receiving layer. The dye-giving compounds have the formula

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Leverkusen, Germany

Paul Marx