Agfa-gevaert Ag

Heinz Meckl

Helmut Haseler

Gustav Tappe

Karl-Heinz Reuter

Ubbo Wernicke

Erika Spriewald

Ralf Wichmann

Karl Lohmer

Adolf Seiler

Wilhelm Eder

Peter Bergthaller

Erich Wolff

Gunter Renner

Gunter Findeis

Berthold Fergg

Viktor Osegowitsch

Sieghart Klotzer

Paul Marx

Helmut Kampfer

Edgar Draber

Werner Berthold

Hans Hofmann

Willibald Pelz

Rudolf Tromnau

Josef Busch

Hans Hischlager

Manfred Reichrath

Hans P Huber

Joachim Kloeppel

Jurgen Frosch

Hans-Gunter Donner

Photographic processing chemicals in solid form containing the necessary active ingredients and auxiliary substances and in addition at least one compound corresponding to formula (I)

Photochemicals with reduced dust formation

A readily biodegradable bleaching bath having an adequate bleaching effect

Bleaching bath

The process for bleach fixing an exposed and developed color photographic material whose silver halide emulsion layers contain silver chlorobromide emulsions having a silver bromide content of from 0.3 to 2.0 mol%, in which the bleach fixing bath (1) contains, as bleaching agent, an iron(III) complex at least 50 mol% of whose complex former corresponds to the following formula ##STR1## (2) is adjusted to a pH of x where 7.0&gt;.times.&gt;4.5 and (3) contains a thiosulphate is distinguished by a powerful bleaching action and great environmental compatibility.

Bleach fixing process

Photographic processing chemicals in the form of granulates having an average particle diameter of from 150 to 3000 .mu.m containing a polymer having a molar mass of from 6,000,000 to 14,000,000 in a quantity from 1 to 1,000 mg/kg of granulate consisting of at least 80 mol % of one or more of the monomers, acrylamide, acrylic acid and cationic monomer or mixtures of acrylamide and cationic or anionic monomer are distinguished by being easy to prepare, dust free and freely pourable.

Granulated photochemicals

A process for processing a color photography silver halide recording material by development, bleach-fixing and stabilization or washing, wherein the silver halide emulsion layers of the photographic material have a chloride content of at least 80 mol %, the total processing time is not more than 60 seconds, the concentration of halide in the developing bath in the use state does not exceed 10.sup.-2 mol/l, the chloride content of the halide in the developing bath being at least 80 mol %, and the processing baths are replenished during continuous operation, provides results of good quality such as are otherwise obtained only by processing over a total period of at least 180 seconds.

Process for rapidly processing a color photography 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 processing method without washing gives good photographic properties, without a precipitate being deposited in the stabilizing bath, when the bleach-fixing bath contains a compound of the formula

Photographic processing method

Excellent image silver stability is obtained without intermediate washing after fixing and without a special finishing bath by a process for stabilizing a silver image produced by exposure, development and fixing of a photographic material containing at least one silver halide emulsion layer, in which, immediately after fixing, the photographic material is subjected to treatment by a stabilizing bath containing a compound corresponding to general formula (I) ##STR1## in which X=Cl, Br

Process for stabilizing photographic silver images

In the case of color materials with the usual processing times, bleaching and bleaching/fixing baths containing an iron(III) ion complex salt as bleach and, in addition, a 5- to 7-membered heterocyclic compound containing at least one N-atom and at least one other hetero atom from the group consisting of O,S,N which is substituted by --S.sup..crclbar. and, at a quaternary ring nitrogen atom, carries a positive charge arranged in such a way that no tautomeric charge compensation to a neutral thione form is possible, provide for good bleaching, i.e. for black areas free from residual silver in the case of color negative materials and for low minimum densities in the case of color reversal materials, by virtue of their excellent bleaching rate and, at the same time, their high stability.

Bleaching baths containing bleaching accelerators

In a process for the processing of color photographic silver halide material which has been exposed to form an image by development, bleachfixing, washing or stabilization and drying, the aqueous developer solution being free from benzyl alcohol, the pH value of the bleachfixing solution, which contains an iron(III) complex salt, being below 7 and the bleachfixing solution containing a compound corresponding to general formula (I) ##STR1## in which Z represents the atoms required to complete an optionally further substituted heterocyclic ring and

Process for processing a color photographic material

A no-rinse processing method for the production of color photographic images comprising the steps of developing, bleaching, fixing and stabilizing, of which the bleaching and fixing steps may be combined into a bleach fixing step, gives dye images of satisfactory quality, even after prolonged use, if the stabilizing bath used in the stabilizing step contains an effective quantity of a pyrazole which, in one of the possible tautomeric forms, corresponds to the following general formula: ##STR1## in which X represents OH or NH.sub.2,

No-rinse photographic processing method and the stabilizing bath used

Container for active purifying agent for the purification of liquids, in particular photographic processing baths, comprising a container bottom above which is a space (2) for containing active purifying substance, a closure mechanism (5), an inlet tube (6) and a discharge tube (7) wherein a porous, compressible mass (4) is arranged between the space (2) for active purifying substance and the closure device (5).

Container for the purification of liquids

Anion exchangers containing OH groups as exchange active groups are suitable for the regeneration of photographic developers.

Regeneration of spent developers

Receivers with a detachable seal comprising a porous compressive mass (4) substantially covering the whole base of the receiver are suitable for purifying liquids, particularly photographic processing baths.

Receiver for purifying liquids

Photographic recording materials which contain a developer substance or a precursor thereof produce better results if in addition they contain a sulphite, a disulphite or a compound capable of releasing sulphite in the photographic material.

Growing community of inventors

Bergisch Gladbach, Germany

Heinz Meckl