Agfa-gevaert Ag

Agfa-gavaert, A.g.

Werner Berthold

Paul Marx

Anita Von Konig

Hans Hlschlager

Helmut Haseler

Ubbo Wernicke

Helmut Timmler

Artur Botta

Heinz Meckl

Christian Rasp

Gustav Tappe

Gunther Mahlberg

Hans Hischlager

Hlschlager

The present invention relates to a photographic reversal process for the production of positive photographic images by imagewise exposure of the photosensitive material containing at least one silver halide emulsion layer, black-and-white first development of the material, chemical fogging or diffuse second exposure and subsequent color development, characterized in that

Photographic reversal process

A silver image produced by imagewise exposure, development and fixing of a photographic material containing at least one silver halide emulsion layer is stabilized by being subjected after fixing to treatment by a stabilizing bath containing a compound corresponding to general formula I

Process for stabilizing photographic silver images

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

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

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

Stabilizing baths used in rapid reproduction processes of photographic elements which comprise stabilizers, hardening additives and corrosion preventatives are improved in that certain heterocyclic compounds are incorporated in the baths. Excellent protection against corrosion is attained without a deleterious effect on the quality of the photographic material.

Corrosion preventative for two-bath stabilizer baths

Photographic images are produced by imagewise exposure, development and stabilization in which development is carried out in the presence of an .alpha.,.alpha.'-[2,5-dimercapto-1,2,4-triazolyl-4-imino] -p-xylene compound which improves the stability of the silver image in extreme climatic conditions.

Growing community of inventors

Leverkusen, Germany

Werner Berthold