Agfa-gevaert Ag

Agfa-gevaert Aktiengesellshcaft

Agfa Gevaert Nv

Miles Inc.

Wolfgang Himmelmann

Gunter Helling

Peter Bergthaller

Johannes Sobel

Wolfgang Sauerteig

Fritz Nittel

Karl-Wilhelm Schranz

Lothar Rosenhahn

Rudolf Meyer

Helmut Reiff

Erwin Ranz

Gunter Sackmann

Manfred Beck

Hans Hlschlager

Kaspar Wingender

Hans-Theo Buschmann

Kurt Findeisen

Marcel J Monbaliu

Erich Wolff

Hans Langen

Gunter Renner

Raphael K Van Poucke

Immo Boie

Gerhard Balle

Hans Ohlschlager

Reinhart Matejec

Gunter Kolb

Gunther Schenk

Manfred Peters

Werner Krafft

Wilhelm Saleck

Helmut Kampfer

Ernst Meier

Hans-Heinrich Credner

Karl Frank

George F Van Veelen

Thomas Kaluschke

Alexander Riebel

Prem Lalvani

Willibald Pelz

Karl W Schranz

Rolf Bruck

Rudolf Tromnau

Gaston Jacob Benoy

Karl Czernik

Gary Oosta

Edouard Roche

Johannes Sobek

Edy Roche

Peter Kruck

Erich Muller

Karl-Wilhem Schranz

Heinz Quambusch

A photographic recording material comprising a support, at least one photosensitive silver halide emulsion layer, a protective layer on that side of the at least one silver halide emulsion layer remote from the support and, optionally a backing layer, the protective layer and/or the backing layer containing in combination (a) a polymeric compound (I) containing at least 0.2 mol-% recurring units corresponding to the following formula ##STR1## in which R.sup.1, R.sup.2 and R.sup.3 may be the same of different and represent hydrogen, alkyl or halogen,

Photographic silver halide element with protective layer

Process for the preparation of stable dispersions of hydrophobic reagents in aqueous material, which process involves dissolving an ionomeric polymer, together with hydrophobic reagent substance, in a suitable organic solvent, adding water to the resulting material and then removing the organic solvent. The resulting dispersion has exceptionally high stability and finds utility in the production of diagnostic reagent test devices.

Process for the preparation of reagent layers containing hydrophobic

A photographic recording material which comprises at least one gelatin-containing silver halide emulsion layer and at least one protective layer containing a gelatin derivative, the protective layer being further away from the layer support than each silver halide emulsion layer and 30 to 90% of the amino groups of the gelatin in the gelatin derivative being reacted with a monofunctional acid derivative, and which is hardened with an instant hardener can be produced at high speed and, hence, at high drying temperatures without any reticulation grain occurring during processing.

Photographic recording material

Photographic recording materials of which the binder layers consist of protein-like binders which have been hardened in the usual way show reduced susceptibility to the effect of formaldehyde when--in addition to the usual hardeners--low molecular weight monofunctional compounds which are capable of reacting with free primary amino groups of the binder under casting and/or storage conditions without causing additional hardening are allowed to act on the binder.

Photographic silver halide recording material comprising a support, at least one light-sensitive silver halide emulsion layer, a protective layer and optionally other layers, at least one layer which is arranged closer to the support than the protective layer containing a compound which in the form of the free acid corresponds to the following formula ##STR1## wherein R.sub.1 denotes alkylene, arylene, aralkylene or cycloalkylene,

Photographic recording material containing polyester compounds having

In order to be able to cast additional layers on auxiliary layers of photographic materials immediately after the latter have been cast without encountering any difficulties as regards uniformity of the cast layer and wet adherence due to incomplete conversion of the gelatine from the sol to the gel form, the auxiliary layer must contain an effective quantity of at least one compound obtained by the reaction of trihydric to hexahydric alcohols with propylene oxide.

Photographic material

Water soluble sulphates of a heteroaromatic bis- or poly-sulphone are suitable for use as hardeners for proteinaceous binders, in particular in photographic layers.

Hardeners for proteins, a layer of binder hardened therewith and a

Propane or butane sultones are prepared by the thermal decomposition of the corresponding aryl sulfoalkyl ethers wherein the alkyl part has three or four carbons between the sulfo group and the ether oxygen. When a tertiary amine is present, the final product is the corresponding sulfoalkyl quaternary salt of the tertiary amine.

Process for the preparation of sulfoalkyl quaternary salts and for the

Water-soluble substantially non-hardening aldehydes or water-soluble substantially non-hardening aldehyde precursor compounds are suitable as fog-reducing compounds for the photographic dye diffusion transfer process in which an imagewise-exposed color photographic recording material containing light-sensitive silver salt and a non-diffusing dye-releasing compound in at least one binder layer arranged on a layer support, is developed, preferably under the effect of heat, to produce a diffusible dye image and in which the diffusible dye image is transferred to an image receptor layer.

Photographic dye diffusion transfer process and color photographic

Water-soluble adducts of tertiary amines with heteroaromatic bis- or polyvinyl sulfone compounds are suitable for hardening layers containing proteins as binder.

Hardeners for proteins, a binder layer hardened therewith and a

A color photographic recording material contains at least one silver halide emulsion layer which is divided into a partial layers of different sensitivity, at least one relatively high-sensitivity partial layer containing a synthetic polymer and gelatin in a ratio by weight of from 30:70 to 80:20.

Color photographic recording material and a process for the production

Polymer latices in which the dispersed particles consist of a soft core and a hard shell are suitable plasticizers for gelatine in photographic recording materials.

Color photographic recording material containing a polymeric gelatine

The photographic silver halide recording material contains particles of a hydroxyalkyl-alkyl cellulose dicarboxylic acid semiester having a particle size of from 0.5 to 8 .mu.m and a particle size distribution of up to .+-.2 .mu.m dispersed in a hydrophilic colloid in at least one of its outermost layers.

Photographic silver halide recording material with cellulose

Colored dye diffusion images are produced using a recording material containing, on a layer support (layer element 1), a first dye absorbent layer (layer element 2), a light-sensitive element containing silver halide emulsion layers and color-providing compounds (layer element 3) and optionally a second dye absorbent layer (layer element 4), in that order. An imagewise distribution of diffusible dyes is produced in the light-sensitive element in the course of development and transferred to the first dye absorbent layer. The light-sensitive element is then decomposed by a treatment which decomposes its layers, e.g. by means of a proteolytic enzyme, but leaves the first dye absorbent layer intact. The second dye absorbent layer optionally present, which has a lower mordanting capacity than the first dye absorbent layer and serves to prevent contamination of the developer bath with diffusible dyes, is also decomposed.

Dye diffusion transfer process wherein proteolytic enzyme decomposes

The recording material contains in an outer layer pre-formed polymer particles, the particle size of which is less than 10 .mu.m and which have a particle size distribution of .+-.1 .mu.m, which are soluble in alkaline medium and are dispersed in a hydrophilic colloid, and which are a graft copolymer of methacrylic acid and methyl-methacrylate on the graft base of an .alpha.-olefin- or styrene-maleic acid semiamide-copolymer.

Photographic silver halide recording material with graft copolymer

Growing community of inventors

Leverkusen, Germany

Wolfgang Himmelmann