Agfa-gevaert Ag

Agfa Ag

Bayer Aktiengesellschaft

Agfa-gevaert

Agfa-gavaert, A.g.

Ubbo Wernicke

Egon Bachem

Heinz Meckl

Herbert Mitzinger

Heinrich Odenwalder

Viktor Osegowitsch

Ralf Wichmann

Gunter Rockle

Gunther Schnall

Wilfried Hehn

Reinhart Matejec

Franz Moll

Helmut Haseler

Gustav Tappe

Werner Berthold

Friedhelm Sommer

Werner Went

Udo Quilitzsch

RoGu

Jurgen Frosch

Hans-Gunter Donner

Photographic black-and-white reversal first developer

Archival photographic silver images are obtained by the finishing bath's containing 10 to 60 mg of metal ions/liter of metals, the electrode potential of which in the electrochemical series is more positive than that of silver.

Process for the production of archival silver images

A method of processing photographic silver halide materials comprising several processing steps, in which at least two chemical treatment stages are each followed by a washing and drying is distinguished by reduced chemical consumption and a reduction in the formation of waste solution to be disposed of.

Method of photographic processing

Processing with a particularly economical use of chemicals is achieved with a device for the wet-chemical processing of a photographic material, in which at least one processing stage comprises a rack having a plurality of rotatable rollers which are in contact with the layer surface of the material, at least one roller being encased over 30.degree. to 300.degree. of its circumference in such a manner that processing fluid located in the space between the roller and the casing cannot fully escape.

Processing device for photographic materials

A bleaching bath for photographic black-&-white silver halide materials characterised by the combination of at least 2 oxidising agents having an oxidising potential of .gtoreq.500 mV, optionally together with a metal salt having a stabilising action of a metal of subgroups 1 or 2 of the periodic system of elements, wherein, in the event that dichromate is used as one of the oxidising agents, it is used in a quantity of at most 3.4 mmol/l.

Bleaching bath for photographic black-&-white material

A device for washing photographic material, comprising at least one washing tank and at least two rows of pairs of rollers, arranged one above another, above the liquid level of the tank, of which the first row is passed through by the photographic material in a descending direction and the second row is passed through by the photographic material in an ascending direction, wherein

Device and process for the rapid washing of photographic material

A device for processing a photographic silver halide material, comprising a tank which is filled with a photographic processing bath, through which the photographic material is continuously conducted at a specified conveyance speed, and in which, below the level of the bath, is arranged at least one driven roller which can rotate at a peripheral speed which differs from the conveyance speed of the photographic material and the surface of which is in contact with the photographic material on the emulsion side, facilitates a reduction in the processing time or, in the case of an unchanged processing time, improved processing reliability.

Device for the development of photographic silver halide material

A device for processing photographic materials and comprising at least one tank filled with a liquid, in which

Liquid wiper for photographic material

In a tank filled with a photographic processing liquid containing, below the liquid level, devices for substantially reducing or completely removing at least once the diffusion layer adhering to the interface of the photographic material, the processing time in the given bath can be reduced or the temperature of the bath lowered without any change in the photographic results.

Apparatus for processing photographic materials

A device for processing photographic materials comprising at least one liquid-filled tank and liquid from the liquid-filled tank is removed from the photographic material and lead back to the same tank. The tank comprises several pairs of rollers placed one above the other above the liquid level of the tank or downstream of the tank. The rollers of each pair of rollers are parallel to one another. At least one pair of rollers is provided with a liquid supply directed to the pair of rollers to provide a system for efficient cleaning of the photographic material. The rollers have an adjustable pressure device and a specific pressure range.

Liquid stripper for photographic material

A process for the treatment of a photographic material with a bath containing at least one processing chemical, in which, after the treatment bath, the photographic material is guided upwards through a sloping compartment which closely surrounds the photographic material and is washed from above with water which, under the effect of gravity, flows in countercurrent to the photographic material, leads to a surprisingly marked reduction in the chemical load of the material.

Method for processing photographic materials

A method for processing photographic silver halide materials with aqueous processing baths which are replenished during processing, in which at least one chemical substance in the form of a plurality of solid bodies of geometrically defined shape and of the same size and composition is added to replenish at least one processing bath, is distinguished by a low consumption of chemicals and by a minimal accumulation of overflow for subsequent disposal.

Photographic processing method and apparatus

Device for developing photographic film bases

A machine for developing photographic material comprising more than one tank and means for continuously conveying photographic material through the development machine, reduces the entraining of chemicals from one tank to the next, when the conveying distance is 40 to 200 cm.

Machine for developing photographic material

A method of processing photographic materials in which development is followed by at least one further chemical treatment preceded and followed by washing and in which the liquid of the washing which follows this chemical treatment is removed in particular from the region of entry of material into this following washing bath and supplied to the material in the region of the preceding washing, preferably the material discharge region of the preceding washing, is distinguished by exceptionally low loss of chemicals.

Growing community of inventors

Roesrath-Kleineichen, Germany

Ubbo Wernicke