Agfa-gevaert Ag

Karl Lohmer

Heinz Meckl

Willibald Pelz

Anita Von Konig

Helmut Haseler

Werner Liebe

Hermann Seiz

Jurgen Stoltefuss

Karl Zietan

Siegismund Schutz

In a process for hardening gelatine containing layers of color photographic multi-layered materials which have a paper laminated with a polyolefin layer arranged on both sides a substrate 1,3,5-triacrylohexahydro-1,3,5-triazine and a polyhydric aliphatic alcohol with 3 to 10 carbon atoms are added to the casting solutions and the casting solutions are then applied to a corona irradiated surface of the substrate.

Process for hardening color photographic silver halide emulsion layers

An image receptor element for the dye diffusion transfer process contains an image-receiving layer, which has increasing dye absorption capacity with increasing distance from the light-sensitive layers. Such an image-receiving layer may be obtained by use of mordants in concentrations which increase with increasing distance from the light-sensitive layers or by use of at least two mordants of different dye absorption capacity, the mordant of higher dye absorption capacity being arranged in a partial layer of the image-receiving layer further away from the light-sensitive layers. Such image receptor elements provide higher dye densities with lower total concentrations of mordants.

Image receptor element for the dye diffusion transfer process

Color images are obtained by chromogenic development of a colorphotographic material comprising several differently spectrally sensitized silver halide emulsions and color couplers associated thereto, a hydrophobic cyan coupler being incorporated by means of a hydrophobic coupler solvent and a hydrophobic yellow coupler being incorporated without a coupler solvent, when a color developing composition is used comprising a hydrophilic and a hydrophobic color developer compound. The color images have good stability of the cyan partial image to tropical conditions and good lightfastness of the yellow partial image.

Color-photographic development process

A new process for the regeneration of spent color developers using both an ion exchanger and certain adsorbents is described. This process preserves the capacity of the exchanger to be regenerated.

Regeneration of spent color developers

A photographic silver halide material containing a new stabilizer compound which is an aromatic compound containing in ortho position two bridging members which are linked to form a spiro structure with a 2'-imidazolidine-4',5'-dione as defined hereinafter.

Color photographic materials with spiro heterocyclic stabilizing agents

In a color photographic multilayered material which is suitable for rapid processing the protective layer and the auxiliary layers contain pigskin gelatine ashed under acid condition.

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Leverkusen, Germany

Karl Lohmer