Agfa-gevaert Ag

Agfa Gevaert Nv

Miles Inc.

Agfa-gevaert Aktiengesellshcaft

Karl-Wilhelm Schranz

Gunther Schenk

Ernst Meier

Friedrich-Wilhelm Kunitz

Johannes Sobel

Hans-Heinrich Credner

Wolfgang Lassig

Karl Kuffner

Erich Wolff

Wolfgang Himmelmann

Hildegard Schnoring

Peter Bergthaller

Erwin Ranz

Immo Boie

Hans Ohlschlager

Gunther Koepke

Hans Heinrich Credner

Marcel J Monbaliu

Raphael K Van Poucke

Hans Hlschlager

Dieter Lowski

George F Van Veelen

Alexander Riebel

Hans Glockner

Siegfried Schleger

Gaston Jacob Benoy

Gary Oosta

Rigobert Otto

Gertrud Kirchhoff

Wolfgang Hunicke

Erwin Sch/o/ N

Peter Doppelfeld

A color photographic recording material contains a dispersion of hardened particles of a complex coacervate (packet emulsion) in at least one layer of binder, which particles are hardened with a hardener corresponding to the following formula I ##STR1## wherein R.sup.1 and R.sup.2 are identical or different and each denotes an alkyl group with 1 to 8 carbon atoms or an aryl or aralkyl group optionally substituted with an alkyl group having 1 or 2 carbon atoms or with a halogen atom or R.sup.1 and R.sup.2 together denote the atoms required for completing a heterocyclic ring, e.g. a piperidine or morpholine ring, optionally substituted with an alkyl group having 1 or 2 carbon atoms or with a halogen atom,

Photographic recording material

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

Heteroaromatic vinylsulphone compounds having at least two vinylsulphonyl groups each attached to a carbon atom of a heteroasomatic ring are suitable for hardening proteinic binder layers such as photographic layers containing gelatine as binder.

Hardened proteinic binder layer

In a heat developable color photographic recording material containing, in a common layer of binder, a light-sensitive silver halide, optionally combined with a substantially light-sensitive silver salt, and a non-diffusible dye releasing compound, the binder of the said layer consists to an extent of at least 30% by weight of a polyurethane containing anionic groups. The recording material has a considerably increased sensitivity combined with improved D.sub.min /D.sub.max relationship.

Color photographic recording material capable of being developed by heat

Proteins such as enzymes are attached directly to a polyamide or cellulose hydrate carrier. Attachment can be carried out by impregnation of the carrier with a protein solution. The carrier can be in the form of a membrane, and the polyamide can be nylon. Resulting carrier-bound proteins find utility as biocatalyst, as test strips or as chromatography materials. In a preferred embodiment, a polyamide or cellulose hydrate membrane carrier is impregnated with an enzyme selected from peroxidase, glucose oxidase, diaphorase and glucose dehydrogenase and then dried, coated with a luminol solution and again dried. The resultant membrane can be used for glucose determination by measuring chemiluminescence produced when the membrane contacts a glucose solution.

Enzymes immobilized on polyamides or cellulose hydrate

The heat development process using an integral color photographic recording material carrying, on a preferably transparent layer support, both an image receptor layer and light-sensitive layers of binder with silver halide and associated dye releasing compounds, optionally with a light-reflecting layer of pigment between the image receptor layer and the light-sensitive layers, may be carried out as a one-step development process in which silver halide development and color transfer take place at the same time if an auxiliary sheet containing a thermal development and diffusion promoting substance in a layer of binder is used. The thermal development and diffusion promoting agent is preferably liquid under normal conditions and dispersed in a microencapsulated form in the layer of binder.

Photographic heat development process and auxiliary sheet suitable

Compounds corresponding to formula I are suitable for use as thermal development and diffusion promoting agents for the heat development process. The said compounds enable higher color transfer densities to be obtained and/or the development time to be reduced. ##STR1## wherein R.sup.1, R.sup.2 denote alkyl, cycloalkyl, aralkyl, aryl or acyl and

Heat development process and color photographic recording material

Transfer images free from spots are obtained by the heat development process using a photographic recording material and a separate image receptor sheet if either the photothermographic recording material or the image receptor sheet or both contain a mixture of gelatine and sodium alginate in a surface contact layer.

Alkali metal alginate surface layer for heat development process

A color photographic recording material developable by heat treatment and comprising at least one binder layer, which contains photosensitive silver halide, optionally a substantially non-photosensitive silver salt and a color providing compound (dye releaser), can be improved in regard to the Dmin/max relation and in regard to sensitivity by addition of a compound corresponding to formula I

Color photographic recording material developable by heat treatment

Yellow Couplers of the formula ##STR1## wherein Y represents an aliphatic or cycloaliphatic radical;

Color photographic color coupler-containing recording material

A photographic recording material for the production of color images to be viewed by reflected light contains, on a transparent support layer at least 60 .mu.m in thickness with smooth surfaces, a plurality of silver halide emulsion layers with differing spectral sensitivities and color couplers associated therewith and a light reflective opaque layer of binder. The material is developed chromogenically from the coated side. Exposure and viewing are carried out through the transparent support layer.

Photographic recording material for the production of color images to be

Silver halide developer compounds containing amino groups and attached in the form of a salt to ion exchangers are embedded in layers of photographic recording material comprising at least one silver halide emulsion layer. In color photographic recording materials, the silver halide emulsion layers may have color-providing compounds associated with them.

Photographic recording material containing a developer compound

Colored images consisting of metal-complexed azomethine dyes are prepared by chromogenic development of silver halide photographic recording materials in the presence of color couplers. The color developers contain a grouping capable of metal chelate formation adjacent to the primary amino group. The azomethine dyes are transferred into the corresponding azomethine dye/metal complexes. The complex formation is accompanied by shift of color hue and increase of light stability.

Process for the production of photographic images

Process for the production of photographic emulsions consisting of water-immiscible or water-insoluble organic substances and an aqueous solution of an organic binder, characterized in that the hydrophilic and hydrophobic phases are heated separately, each to its particular temperature above its liquefaction point, and then continuously dosed into a dispersing chamber.

Process for the production of dispersions and photographic materials

The invention relates to a process for the production of photographic emulsates consisting of dispersions of water-immiscible or water-insoluble particles in aqueous binder solution, characterized in that the entire non-aqueous phase is initially introduced at a temperature above the liquefaction temperatures of the aqueous and non-aqueous phases, after which a relatively small volume of aqueous phase is emulsified continuously or in portions into the non-aqueous phase by known methods and then more aqueous phase is introduced while emulsification is continued in such a quantity that the viscosity of the emulsion passes through a maximum (indicating phase reversal into an emulsion of non-aqueous particles in aqueous dispersion medium (FIG. 1)).

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Odenthal-Hahnenberg, Germany

Karl-Wilhelm Schranz