Abstract: Hardeners for photographic materials, the binders of which substantially consist of gelatine, wherein the hardeners are carbamoylpyridinium salts, the amine components of which are derived from secondary amines, which amines are converted into photographically inert products by an intramolecular cyclisation reaction, improve photographic properties, even when the material is stored under extreme conditions.

Abstract: Compounds of the formula I are suitable as release compounds for photographically useful groups (photographic units). On reacting with nucleophilic reagents, preferably with dinucleophiles, the photographically useful group is released. ##STR1## In formula I: PUG means a photographically useful group;A means a strong electron acceptor;V means a vinylene group or two or more successive vinylene groups, wherein the vinylene group or two successive vinylene groups may form part of an aromatic ring system;L means one or more timing groups;m means 0 (zero) 1 or 2;n means 0 (zero), 1 or 2;R.sup.1 means H or methyl;R.sup.2 means H, alkyl with 1-18 C atoms or aryl;R.sup.3, R.sup.4 mean H or an organic group,wherein R.sup.2 and R.sup.3 may also together mean the residue necessary to complete a ring.

Abstract: (Magenta) colour images with improved stability to light may be obtained with a colour photographic recording material containing compounds of formula I as magenta couplers. The magenta couplers of formula I are particularly suitable for use in recording materials of positive colour images on light reflecting or transparent supports.

Abstract: Magenta dye images with excellent stability to light are obtained with a color photographic recording material which contains, associated with a light-sensitive silver halide emulsion layer, at least one magenta coupler corresponding to formula I and at least one compound corresponding to formula II.

Abstract: A color-photographic recording material comprising at least one red-sensitive silver halide emulsion layer associated with a cyan coupler, at least one green-sensitive silver halide emulsion layer associated with a magenta coupler, and at least one blue-sensitive silver halide emulsion layer associated with a yellow coupler, at least one layer of the material containing a hydroquinone diether compound having the following formula I and optionally at least one compound having one of the formulae II, III, IV, V, SA and SB given in the description, characterized by increased light stability of the image colorants produced during chromogenic development, ##STR1## In the formula: R.sup.1 denotes alkyl, cycloalkyl or aryl;R.sup.2 denotes H, alkyl;R.sup.3, R.sup.4 denote H, alkyl, cycloalkyl, aryl, halogen, alkoxy, aroxy, acyloxy, alkylthio, arylthio, acyl, sulphonyl, sulphamoyl, acylamino, sulphonylamino, nitro;R.sup.5 denotes H, acyl, alkyl;X denotes --O-- or --NR.sup.6 --;R.sup.

Abstract: Pyrazolo[5,1-c][1,2,4]triazoles of the general formula I ##STR1## in which R.sup.1 and R.sup.2 represent alkyl, cycloalkyl, aralkyl, aryl, alkoxy or heterocyclic radicals, R.sup.3 is hydrogen, halogen or an alkyl, cycloalkyl, aralkyl, aryl or heterocyclic radical bonded via a hetero atom, wherein R.sup.2 and R.sup.3 may be closed to form a ring, and R.sup.4 is hydrogen or an acyl radical, are prepared from 3(5)-amino-pyrazoles of the general formula II ##STR2## in which R.sup.2 and R.sup.3 have the abovementioned meaning, by reaction with a hydroximoyl halide of the general formula III ##STR3## in which R.sup.

Abstract: A color photographic material containing color couplers which yield heat-stable dyes.A color photographic recording material containing cyan couplers which, during chromogenic development, yield cyan dyes having parameters a and b such thata.(1+b).ltoreq.1.5are suitable for the production of color negatives for multicopy operation in which a plurality of identical copies are successively prepared from the same original.In the above condition:a is the temperature coefficient of the absorption ##EQU1## and b is the temperature coefficient of the absorption wavelength .lambda..sub.(T=23.degree. C.

Abstract: Light sensitive color photographic silver halide material containing at least one light sensitive silver halide layer with which a conventional diffusion fast color coupler is associated and optionally other layers, both light sensitive and light insensitive, in which material the one or more than one light sensitive silver halide layer contains, at a concentration of 10.sup.-3 to 10 mmol/mol of silver halide, a compound corresponding to the following formulaA(Z).sub.n K (I)absorbed on and adhering to the silver halide grain and reacting with the developer oxidation product (EOP) with an effective reaction rate constant of K.sub.eff .gtoreq.10.sup.3, in which formulaA is a grain active bonding group,Z denotes a divalent intermediate membern is 0 or 1 andK denotes a group which forms a colored or uncolored reaction product in the reaction with the developer oxidation product,is found to have an improved sensitivity/graininess ratio.

Abstract: Photographically useful organic compounds containing secondary-branched alkyl radicals with at least 15 C atoms corresponding to formula I have a low melting point, good solubility in oil formers and a low tendency towards crystallization which makes them particularly suitable for photographic applications. ##STR1## In formula I: PNOV is the residue of a photographically useful organic compound, for example a coupler or oil former;L is a chemical bond or a link between PNOV and X;X represents --O--, --S--, --SO--, --SO.sub.2 --, --NH--, --NR-- (R.dbd.alkyl or acyl), --CO-- or alkylidene;R.sup.1 and R.sup.2 are unbranched alkyl radicals containing at least 6 C atoms, with the proviso that R.sup.1 and R.sup.2 together contain at least 14 C atoms and, where X represents --CO-- or --CH.sub.2, at least 17 C atoms.

Abstract: Color photographic silver halide material which contains in at least one silver halide emulsion layer a magenta coupler of the formulae (I) or (II) ##STR1## wherein R.sub.1 denotes alkyl, aryl or a ballast radical,R.sub.2 denotes a ballast radical, alkyl, or aryl andZ denotes hydrogen or a group which can be split off on reaction with the developer oxidation product,and a compound of the formula (III) ##STR2## wherein R.sub.3 denotes alkyl, alkoxy, aryl, optionally substituted amino or the radical of a heterocyclic compound andR.sub.

Abstract: A color photographic recording material comprising at least one silver halide emulsion layer and a naphtholic cyan coupler corresponding to formula I ##STR1## in which Q is a 5-, 6- or 7-membered heterocyclic radical;S is a substituent which, in the 6-position of the naphthol ring, can form a fused heterocyclic ring with Y;l is 0, 1, 2 or 3;X represents H or a group releasable during color coupling which is capable of forming a fused heterocyclic ring with Y;Y represents --Z--R.sup.1 or --NH--R.sup.2 ;Z represents --O--, --S(O).sub.m -- or --SO.sub.2 --NH--;m is 0, 1 or 2;R.sup.1 represents H, CF.sub.3, alkyl, aryl or a heterocyclic radical;R.sup.

Abstract: A new process for maintaining the properties of the developer in the preparation of colored images by development of exposed silver halide-containing material at an alkaline pH in a developer bath containing p-phenylenediamine derivative and at least 40 mol-% of the silver halide consisting of silver chloride and replenishing the color developer in the bath in such a limited quantity that no overflow occurs but it is sufficient to make up for the loss of bath constituents.This process preserves the sensitive results from development during use of the developer bath.

Abstract: A color photographic silver halide material of the negative type, in which at least one silver halide emulsion layer contains as compound corresponding to the following formulaA--(Z).sub.n --F* (I)adsorbed on the silver halide grain,A being a grain-active attachment group corresponding to formulae IIa to IId: ##STR1## Z is a difunctional intermediate member, F* is a latent fogging agent group which becomes the active fogging agent (F) during color development andn=0 or 1,is distinguished by improved sensitivity.

Abstract: 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.

Abstract: A color photographic silver halide material which, in at least one silver halide emulsion layer, contains a magenta coupler corresponding to formula I or (II) below ##STR1## in which R.sub.1 represents alkyl, aryl or a ballast group,R.sub.2 represents a ballast group, alkyl or aryl,Z represents hydrogen or a group releasable on reaction with the developer oxidation product,and a compound corresponding to formula (III) ##STR2## in which R.sub.3 represents alkyl, alkoxy, aryl, optionally substituted amino or the residue of a heterocycle,R.sub.4 represents COR.sub.5, NHR.sub.6, S(O).sub.n R.sub.7,K.sub.5 represents OR.sub.8, NHR.sub.8, alkyl, aryl or a heterocycle,R.sub.6 represents SO.sub.2 R.sub.8, COR.sub.8 or CONHR.sub.8,R.sub.7 represents alkyl, aryl or NHR.sub.3,R.sub.8 represents alkyl or aryl andn=0, 1 or 2,with the exception of compounds in which R.sub.3 is a carboxymethoxyphenyl, carboxymethoxy, alkoxycarbonylmethoxy or alkoxycarbonylmethoxyphyl radical substituted at the methylene group.

Abstract: Compounds corresponding to Formula I ##STR1## wherein R.sup.1 denotes an acyl group andX denotes hydrogen, halogen, alkoxy, aroxy, SO.sub.3 H or a heterocyclic group attached through --O-- or --N<are prepared form a compound corresponding to Formula II ##STR2## wherein X has the meaning already indicated and Q denotes the group required for completing a dicarbonimide ringby reduction of the said compound to the amino compound and acylation into a compound corresponding to Formula III ##STR3## wherein X, Q and R.sup.1 have the meanings indicatedfollowed by conversion of the compound corresponding to Formula III into a compound corresponding to Formula I by hydrazinolytic or hydrolytic decomposition of the dicarbonimide ring.

Abstract: A color photographic recording material having at least one silver halide emulsion layer contains at least one coupler corresponding to the general formula I ##STR1## wherein K represents a coupler group,L a direct bond of a linking member,R.sup.1 alkyl, aralkyl, aryl or amino andR.sup.2 hydrogen or a group -L-K.The couplers of formula I are suitable for high temperature processing without the presence of benzyl alcohol.

Abstract: Magenta images of increased color density D.sub.max can be obtained by using polymeric couplers containing polymerized units of a polymerizable pyrazoloazole coupler of formula I and polymerized units of a polymerizable monomer S which contains at least one acid group and is unsoluble in water at pH .ltoreq.6 and soluble in water at pH .gtoreq.10. ##STR1## In formula I R.sup.1 denotes H, alkyl, aralkyl or aryl,X denotes H or a group which is releasable by coupling, andZ.sub.a, and Z.sub.b and Z.sub.c denote a substituted or unsubstituted methine group,.dbd.N-- or --NH--, and either the linkage in Z.sub.a --Z.sub.b or the linkage in Z.sub.b --Z.sub.c is a double bond and the other linkage is a single bond,and at least R.sup.1 or X or a substituent on a methine group denoted by Z.sub.a, Z.sub.b or Z.sub.c contains an ethylenically unsaturated, polymerizable group.

Abstract: Dye images of high color yield and high gradation are obtained with a color photographic recording material containing 2-equivalent yellow couplers corresponding to formula I, particularly in modern rapid processing methods or in developers free from benzyl alcohol. ##STR1## R.sup.1, R.sup.2 (same or different) represent hydrogen, alkyl or halogen; R.sup.3 represents alkoxyalkyl or an alkyl radical substituted by a heterocyclic group containing at least one oxygen atom;R.sup.4 represents alkyl or aryl;R.sup.5 represents halogen or alkoxy;R.sup.6 represents hydrogen, alkoxy, amino, acylamino or carbamoyl;represents alkoxy, acylamino, carbalkoxy, carbamoyl or sulfamoyl.

Abstract: Photographic color images with improved sensitometric properties and in particular with high maximum magenta density can be obtained by use of a color photographic recording material containing a pyrazoloazole type magenta coupler of formula I ##STR1## in which PAZ represents the group of a color coupler of the pyrazoloazole series capable of color coupling;L represents a bond containing at least 4 carbon atoms;B represents alkyl, aryl or a heterocyclic group;R.sup.1 represents H, halogen, alkyl, alkoxy;R.sup.2 represents H, alkyl, cycloalkyl;L and B together containing at least 12 carbon atoms.