Abstract: 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,R.sup.3 denotes a hydrogen atom or an alkyl group having 1 or 2 carbon atoms andn represents 0 or 2.

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

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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 andZ denotes a group for completing a saturated heterocyclic ring containing 5 to 11 ring members.

Abstract: 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.

Abstract: 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 IR.sup.1 --S--CO--O--R.sup.2in which R.sup.1 and R.sup.2 independently of one another represent alkyl, alkenyl, cycloalkyl, aralkyl or aryl.

Abstract: Yellow Couplers of the formula ##STR1## wherein Y represents an aliphatic or cycloaliphatic radical;X represents hydrogen or a separable group;R.sup.1 represents an alkyl radical having from 12 to 20 carbon atoms; andR.sup.2 represents an alkyl radical having from 1 to 4 carbon atoms,can be well dissolved in oil formers and also couple in the absence of benzyl alcohol with a high color yield. They are stable against heat and moisture and give rise to stable yellow dyes in color development.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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)).

Abstract: Sulfilimine compounds of formula I ##STR1## in which R.sup.3 is the residue of a diffusible photographically active compound can be split reductively to release the residue together with a group --SO.sub.2 --NH.sub.2. When R.sup.3 represents the radical of a dye or dye precursor the sulfilimines are useful as color providing compounds in dye diffusion transfer processes.

Abstract: Compounds containing the group ##STR1## are useful in photographic materials for preventing fading of dye images.

Abstract: Compounds of the formulae ##STR1## are useful as antifading agents in photographic materials.

Abstract: An improvement in the prevention color-fog and staining in color-photographic materials is obtained by the inclusion of acylamino substituted hydroquinones derivatives. The compounds can easily be synthesized do not crystalize from their dispersions and are not oxidized to colored by-products during development.

Abstract: Development inhibitor releasing compounds are thioether compounds capable of releasing on reaction with color developer oxidation products, a diffusible mercaptan that inhibits further development of silver halide. Useful DIR compounds correspond to the formula ##STR1## R.sup.1 represents hydrocarbyl Y represents --S-- or --NR.sup.2 --R.sup.2 represents hydrogen, hydrocarbyl or an electron-attracting substituent.X in its preferred embodiment represents a heteroaromatic group that when split of together with the sulfur atoms forms a silver halide development inhibiting mercaptane.