Agfa-gevaert Ag

Wolfgang Sauerteig

Wolfgang Himmelmann

Peter Bergthaller

Erwin Ranz

Gunter Renner

Lothar Rosenhahn

Gunter Sackmann

Hans Ohlschlager

Gunter Kolb

Sieghart Klotzer

Fritz Nittel

Rudolf Meyer

Joachim W Lohmann

Willibald Pelz

Rolf Bruck

Heinz Schutz

Karl Czernik

Peter Kruck

Jens-Peter Grimm

Johannes Sobek

A recording material having improved sharpness and color reproduction contains as uppermost layer a green-sensitive silver chloride emulsion having a layered grain structure, the ratio of diameter to thickness of the silver halide grains being at most 5.

Color photographic recording material

Improved photographic recording materials containing at least one silver halide emulsion layer with comparatively high sensitivity and at least one silver halide emulsion layer with comparatively low sensitivity. Color couplers and DIR compounds of differing reactivities are associated with these layers.

Color photographic recording material and development process

A color photographic recording material, in which a precursor compound for a yellow mask coupler is contained in a green-sensitive layer or in a layer adjacent thereto and in which a blue-sensitive layer is arranged between this layer and the layer support, permits very good sharpness with satisfactory speed.

Photographic recording material with a precursor compound for a yellow

For the production of matted outer layers of photographic silver halide recording materials particles of a copolymer of maleic acid anhydride and a C.sub.2 -C.sub.8 monoolefin are dispersed in an aqueous solution of a hydrophilic colloid and the dispersion thus formed is applied to one or both surfaces of the photographic recording material and the layer is dried.

Process for the production of matting layers

A photosensitive recording material containing at least one silver halide layer and an azo dye is disclosed.

Photosensitive photographic material containing a light-absorbing dye

Protein containing photographic layers are hardened by coating with a hardening solution which contains at least one quick-acting hardener which activates carboxyl groups and at least one polysaccharide.

Process for the hardening of photographic layers utilizing fast acting

In a process for hardening gelatine containing photographic layers, in particular multilayered photographic films, using conventional hardeners and quick acting hardeners, the surface of a layer which contains gelatine and complex forming organic or inorganic salts is exposed to the action of an aqueous solution containing a wetting agent and a quick acting hardener, the quantity of water applied with the solution being calculated so that the layer or multilayered film undergoes swelling to a certain extend, and the degree of swelling is maintained for a period from 10 to 200 seconds, whereupon the layer or multilayered film is dried at a temperature below 30.degree. C.

Process for hardening photographic layers containing gelatine

In a process for hardening photographic protein containing layers as quick acting hardener a carbamoyl pyridinium compound is used the pyridine ring of which carries a sulfoalkyl substituent.

Process for hardening silver halide containing photographic layers with

As quick-acting hardeners for layers which contain protein, in particular gelatin layers for photographic purposes carbamoyl oxypyridinium salts are used.

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Leverkusen, Germany

Wolfgang Sauerteig