Agfa-gevaert Ag

Bayer Aktiengesellschaft

Agfa-gevaert Aktiengesellshcaft

Agfa Gevaert Nv

Agfa Ag

Agfa-gavaert, A.g.

Agfa-givaert Ag

Erich Wolff

Hans Langen

Gunter Renner

Dieter Lowski

Werner Krafft

Karl-Wilhelm Schranz

Friedrich-Wilhelm Kunitz

Wilhelm Saleck

Dieter Freitag

Wulf Von Bonin

Hans Rudolph

Karsten-Josef Idel

Peter Bergthaller

Heinrich Odenwalder

Hans Hlschlager

Reinhart Matejec

Harald Von Rintelen

Hans-Joachim Schumann

Hans-Jurgen Rosenkranz

Gunther Matschke

Harry Elias

Heinz Wiesen

Gunter Helling

Rudolf Braden

Wolfgang Himmelmann

Erwin Ranz

Heinz Meckl

Jorg Hagemann

Lothar Rosenhahn

Johannes Sobel

Sieghart Klotzer

Helmut Haseler

Erwin Muller

Ralf Weimann

Werner Liebe

Karl Frank

Friedhelm Sommer

Rolf Bruck

Herbert Stark

Erwin Sch/o/ N

Dieter Stieler

Egon Meier

Gerd Krauss

Klaus Kirschke

Gerhard Lutze

Ernst Schmitz

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.

Hardeners for photographic materials

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;

Photographic recording material

(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.

Color photographic recording material containing a color coupler of the

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. ##STR1## In formula I, R denotes H or a substituent;

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;

Photographic recording material containing a hydroquinone diether

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.1 has the abovementioned meaning and X represents chlorine or bromine, in the presence of a tertiary base to give a 5-amino-1-hydroximoyl-pyrazole, subsequent reaction with an aliphatic or aromatic sulphonyl chloride in the presence of a tertiary base to give an O-sulphonated 5-amino-1-hydroximoyl-pyrazole, acylation to give an O-sulphonated 5-acylamino-1-hydroximoyl-pyrazole or 5-bisacylamino-1-hydroximoyl-pyrazole and then treatment with bases. The optionally O-sulphonated 5-amino-1-hydroximoyl-pyrazoles or O-sulphonated 5-acylamino- and 5-bisacylamino-1-hydroximoyl-pyrazoles are new valuable intermediates for the synthesis of pyrazolo[5,1-c][1,2,4]-triazoles.

5-amino-1-hydroximoyl pyrazoles

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 that

Color photographic recording material containing color couplers which

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 formula

Color photographic material

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;

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,

Color photographic silver halide material having a magenta coupler and

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;

Color photographic recording material

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.

Process for the production of color photographic images comprising

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 formula

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.

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,

Color photographic silver halide material with sulfonylphenol oil former

Growing community of inventors

Solingen, Germany

Erich Wolff