Abstract: Improved 2-equivalent magneta couplers correspond to the following formula ##STR1## in which B is a stabilizing group,X is a phenylmercapto group substituted in a certain way,Y is halogen, alkoxy, alkyl, alkylsulfonyl, acylamino, alkoxycarbonyl, aminocarbonyl, amino, trifluoromethyl or cyano,n, o=0, 1 or 2p=.ltoreq.3-o andq=.ltoreq.5-nwith the proviso that, where n, o, p and/or q have a value of >1, the substitutents B and Y may be the same or different.

Abstract: In a process for the preparation of a multilayered photographic material in which the layers are applied in at least two stages and the material is dried and wound up in between the stages, sticking of the semi-finished preparations does not occur if the uppermost layer applied in the first stage contains polymer particles soluble in alkali and having an average particle diameter from 0.2 to 5.0 .mu.m.

Abstract: Photographic silver halide recording material comprising a support, at least one light-sensitive silver halide emulsion layer, a protective layer and optionally other layers, at least one layer which is arranged closer to the support than the protective layer containing a compound which in the form of the free acid corresponds to the following formula ##STR1## wherein R.sub.1 denotes alkylene, arylene, aralkylene or cycloalkylene,L denotes the residue of a polyester diol having an average molecular weight of from 500 to 20,000,m denotes 0 to 1,n denotes 0 to 30, preferably 0 to 10 and m+n.gtoreq.1,is distinguished by improved properties, in particular an improved maximum density.

Abstract: 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.

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: In a coated or uncoated film, variations in thickness as well as all possible casting errors may be dependably determined and evaluated, in that two light sources transmit modulated IR light wherein the modulation frequencies are different, wherein one light source transilluminates the film, while the other light source is arranged on the other side of the coating carrier, illuminates the latter obliquely and both the transilluminating and the reflected light bundles are conducted to a photo-receiver. The current signal arising in the photo-receiver is transformed into a current signal, amplified and feeds two electronic filters circuited in parallel, which free the signals from their modulation frequency, after which both signals are separately rectified. Subsequently the signal originating from the transmitted light portion is delogarithmized and forms a statement concerning the thickness of coating, while the light originating from the reflected portion evaluates surface errors.

Abstract: A light-tight, tearable covering for a stack of sheet films to be inserted into a supply magazine of a sheet film-loading device, with the supply magazine provided with a pulling device for removing the covering after closing the supply magazine, the covering has a flat side, a winding flap engageable by the pulling device, a closure flap releasably held on the flat side, and a flat recess-forming portion provided on the flat side and formed so that the closure flap in a wrapped condition is insertable into the recess-forming portion.

Abstract: 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 andR.sup.1 represents hydrogen or an alkali atom,and a coupler containing an activated methylene group, in which a hydrogen atom is replaced by alkyl, cycloalkyl, aryl or aralkyl and reacts with the oxidation product of the color developer to form colorless reaction products, bleaching can be carried out free from residual silver with a low regeneration level of the bleachfixing bath without any water-insoluble precipitates being formed.

Abstract: Process for controlling the visual appearance of an image present on a permanent support in the form of a hydrophilic colloid layer, layer system or relief pattern by the transfer of a continuous non-photosensitive layer from a temporary support onto said permanent support either before or after said image is formed thereon, which comprise by pre-wetting the permanent support either image-free or with said image already thereon, containing the pre-wetted support with said continuous layer carried on the temporary support, and stripping off the temporary support to leave the continuous layer adhering on the permanent support, said continuous layer being non-photosensitive and contains hardened gelatin, the gelatin being applied at a coverage of at most 20 g/m2 and having a degree of hardening corresponding with that achieved by the addition of at least 0.001 g of formaldehyde per gram of gelatin.

Abstract: A process for the rapid development of imagewise exposed silver halide recording materials which contain on a layer support at least three light sensitive silver halide emulsion layers of different spectral sensitivity, with which a cyan coupler, a magenta coupler and a yellow coupler are in each case spectrally associated, comprising the following treatment steps:1. treatment of the photographic material with a solution I of a color developing agent or a salt thereof at pH 1 to 8 over a period of 1 to 10 seconds,2. treatment of the photographic material impregnated with the developing agent with an alkali-containing solution II at pH 10 to 14 over a period of 1 to 10 seconds.produces maximum color densities of the kind otherwise only obtained by conventional development over a period of 45 seconds.

Abstract: An electrophotographic recording material comprising a conductive support and a photosensitive layer containing a photoconductive compound that has p-type charge transport capacity and corresponds to the following general formula (I): ##STR1## wherein: R.sup.1 represents a --NR.sup.3 R.sup.4 group, wherein each of R.sup.3 and R.sup.4 (same or different) represents a C.sub.1 -C.sub.10 alkyl group including said alkyl group in substituted form, a cycloalkyl group, or an aryl group, andR.sup.2 represents hydrogen, an alkyl group including a substituted alkyl group or halogen.

Abstract: The one-part aqueous bleaching bath concentrate containing an ammonium iron (III) complex salt concentration of at least 0.4 mol per liter, an ammonium bromide concentration of from 1.5 to 3 mol per liter, an ammonium nitrate concentration of from 0.25 to 1 mol per liter and a pH below 3 is stable in storage.

Abstract: An apparatus for on-line measurement of the layer thicknesses of moving flexible layer supports over the whole width of the web by photoelectric means is described. A light source (2) which emits UV light passes a beam of parallel or slightly converging rays through the layer support (1), the transmitted light is registered by a photoelectric receiver (3) which is sensitive to UV light and the registered signal is transmitted to an electronic interpretation mechanism (5) from which the layer thickness is determined and recorded on-line once calibration has been carried out (FIG. 1).

Abstract: Polymeric magenta couplers containing polymerized units of a carboxyl-containing polymerizable pyrazoloazole coupler corresponding to formula I below give magenta images characterized increased color density Dmax. ##STR1## in this formula, R.sup.1 =H, alkyl, aralkyl or aryl; X=H or a group releasable by coupling; Z.sub.a, Z.sub.b, Z.sub.c =an optionally substituted methine group, .dbd.N-- or --NH--, either the bond Z.sub.a --Z.sub.b or the bond Z.sub.b --Z.sub.c being a double bond and the other bond being a single bond; and at least R.sup.1 or X or a substituent at a methine group Z.sub.a, Z.sub.b or Z.sub.c contains an ethylenically unsaturated polymerizable group in optionally polymerized form and at least R.sup.1 or X or a substituent at a methine group Z.sub.a, Z.sub.b or Z.sub.c contains a carboxyl group.

Abstract: A photographic copying machine wherein the images of successive frames on a long roll of spliced-together exposed and developed customer films are copied while successive films are advanced stepwise from a supply reel on a first driven mandrel toward and is convoluted on a takeup reel on a second driven mandrel. The copying machine employs a third mandrel which can support a fresh roll in the plane of the roll on the first mandrel, and a fourth mandrel which can support an empty takeup reel in the plane of the rotating takeup reel. The leader of the fresh roll is located adjacent the film path ahead of the copying station and is automatically advanced into the range of an automatic attaching mechanism when the trailing end of the expiring roll has advanced beyond the copying station. The attaching mechanism secures the leader of the fresh roll to the core of the empty takeup reel, and the machine is then ready to make copies of frames forming part of the fresh roll.

Abstract: A reel for webs of photographic material can be driven clockwise and counterclockwise by a reversible d-c motor through the medium of the output shaft of the motor, a second shaft which is coaxial with the output shaft and serves to rotate the reel, and a torsion spring between the shafts. Each shaft carries a disc-shaped polarizing filter, and both filters extend across the path of propagation of radiation from the radiation source to the transducer of an analog optoelectronic detector. The characteristics of signals which are generated by the transducer vary as a function of the extent of angular displacement of the shafts and filters relative to each other. Such signals are transmitted to an evaluating circuit which controls the flow of energy to the motor as a function of deviations of the characteristics of transmitted signals from the characteristics of a reference signal.

Abstract: A tank for the wet processing of photographic material has a container mounted on the inside of one of its walls. The container communicates with a source of processing liquid and has at least one nozzle for spraying the liquid against photographic material being conveyed through the tank. The nozzle defines a constriction in the tank and an enlargement is present below the constriction. A movable rack has several pairs of rolls which serve to advance the photographic material through the tank, and one or more sheet-like guides for directing the photographic material to the nips of the rolls. At least one such guide is located below the constriction when the rack is mounted on the tank in working position and a portion of this guide is then disposed in the enlargement. To prevent the guide from catching on the nozzle upon removal of the rack from the tank, the guide is mounted on the rack for pivotal movement between an inoperative position and an operative position.

Abstract: A magnetic tape cassette, in which the activation of the front flap (11) and of the slide (15) is coupled by cassette-side means, contains a side part (12) of the front flap provided with a recess (20) in which a guide peg (18), which rests in the sidewall (16) of the slide, engages with the recess and thus couples the swivelling movement of the front flap with the sliding movement of the slide. In another embodiment, the side wall (12) of the front flap (11) contains a guide peg (22) which engages with a recess (21) provided in a side wall (16'') of the slide (15) (FIG. 3, FIG. 5).

Abstract: Intramolecular nucleophilic displacement compound or a precursor thereof wherefrom during photographic processing a photographically useful group can be split off, said intramolecular nucleophilic displacement compound or precursor thereof corresponding to the following general structure (I): ##STR1## wherein Nu.sup.1 represents a nucelophilic group e.g. HO, H.sub.2 N or Hs, or a precursor of such nucleophilic group e.g. an oxidized nucleophilic group e.g. O.dbd. or HN.dbd., or RO wherein R is an alkyl, an acyl, an aryl or a trialkylsilanyl group, which groups may be substituted, the said nucleophilic group or precursor thereof being located in adjacent position to C(R.sup.1 R.sup.2) so as to make possible elimination of PUG through a nucleophilic displacement reaction;Ar represents an aryl group or a heteroaryl group (e.g. pyridine), which groups may be substituted by one or more mono-atomic or poly-atomic groups, e.g.

Abstract: A strip of light sensitive material wound in a coil onto an open-ended core 2 is package in tearable light tight wrapping material 6, 7 which protects the rolled web while leaving an exterior end 3 of the coil exteriorly accessible. The light tight wrapping material 6, 7 is tearable by pulling on the exterior end 3 to commence unwinding of the coil from the core. The wrapping material is formed with a circumferential portion 6 and two end flange portions 7 which latter have their inner margins 11 tucked within the open ends of the core 2 and light-tightly sealed thereto.