Abstract: Process for the production of a photographic mask for tonal correction by dry dot etching wherein the selection of a particular halftone color separation image or overlaying registering combination of halftone color separation images used in a known process of mask production is not determined on the basis of the subjective attribute of color, i.e., hue, those areas to be color corrected, but is determined on the basis of optical density differences in at least one such halftone color separation, i.e., differences in contrast, between each area to be isolated as a substantially transparent area, and at least one particular background area surrounding each area to be isolated. The density differences can be compared between individual isolated areas and associated background areas directly or as the algebraic sums of such differences for a plurality of such areas. The calculation of the density differences and their comparison can be carried out by a computer.

Abstract: A continuous microfilming apparatus comprising a filming station, means for feeding documents to be microfilmed to the filming station, means for collecting the documents after they have been filmed, and means for transporting the documents from the filming station to the collecting means and turning the documents over substantially 180.degree. while transporting them, which transporting and turnover means includes a transporting reel defining a turnover path of substantially 180.degree. andd flexible guide means circumscribing the transporting reel substantially over 180.degree. and defining therewith a transporting channel for the documents.

Abstract: True-to-type development without any overflow is achieved with a developer solution system of a refill solution and--replenished therewith--a ready-to-use developer solution which contains the following constituents in the quantities indicated per liter aqueous solution and, optionally, other typical consituents:3-15 g of the following color developer compound ##STR1## or a corresponding quantity of salts thereof, 8-35 g PO.sub.4.sup.3 ions,at least 0.2 g antioxidant and2.1-4.2 g KBrand which is adjusted to a pH value of 10.5 to 12.5, the regeneration quota amounting to between 50 and 120 ml/m.sup.2 developed material and the refill solution containing the individual constituents in a such a concentration that, for the above-mentioned regeneration quota, the in-use developer solution always contains the constituents shown above in the quantities indicated.

Abstract: A process of making biaxially oriented polyethylene terephthalate photographic film having a controlled amount of curl in the longitudinal direction, wherein the file is subjected to longitudinal stretching while being asymmetrically heated across its thickness, then wound into a stock roll, and the stock roll thus obtained is heat-tempered. The stock roll after heat-tempering may be longitudinally slit, cut and rewound into smaller rolls in a winding direction opposite to the direction of the longitudinal curl induced in the film during the longitudinal asymmetrical heat-stretching.

Abstract: An arrangement for wet processing running lengths of exposed photographic reversal film has a pair of rinsing tanks downstream of a developing tank in which the film undergoes an initial development. The film consecutively advances through the two rinsing tanks. A liquidtight container is mounted on the inner surface of the second rinsing tank adjacent to the path of the film and spans the width of such path. At least a portion of the container is disposed below the level of the bath in the second rinsing tank and this portion of the container is provided with a window which is transparent to light and extends across the width of the path followed by the film. A light source is arranged in the container behind the window. The film travels by the window with the emulsion facing the latter and is subjected to an additional exposure as it traverses the window.

Abstract: A light-tight magazine for dispensing recording sheets one by one from a stack in which the sheets are separated from each other by intervening spacing foils (17), the spacing foils being held against removal from the magazine by means of ear portions (20, 21) that protrude laterally beyond the sides of the stack and are engaged by means of fixed abutment walls (27, 28) in the magazine interior.

Abstract: A laminate is produced by bonding together two hydrophobic thermoplastic resin sheets at least one of which carries at least one hydrophilic colloid layer containing a photograph and/or other information on its inner side, by the steps comprising:(1) treating such information-bearing hydrophilic colloid layer with an aqueous composition containing a self-cross-linkable reaction product of:(i) an epihalohydrin or an Alpha-dihalohydrin,(ii) a water-soluble polyamide, and(iii) a water-soluble polyamine containing at least two nitrogen atoms separated by at least three carbon atoms and optionally also by at least one oxygen or sulphur atom and having at least two hydrogen atoms attached to different nitrogen atoms,(2) drying thus treated layer, and(3) applying heat and pressure to bond the hydrophobic resin sheets together with such hydrophilic colloid layer sandwiched there-between.

Abstract: The production of a photosensitive silver halide emulsion by precipitation of the silver halide in the presence of gelatine, flocculation and washing of the silver halide precipitated in the presence of the gelatine and redispersion with addition of more gelatine, precipitation being carried out in the presence of a gelatine having a gold number of at most 10 .mu.mol/g gelatine and a cysteine content of at most 6 ppm and redispersion being carried out with a gelatine having a gold number of at least 23 .mu.mol/g gelatine, leads to an emulsion of uniform grain distribution in which undesirably high fogging is avoided.

Abstract: The present invention provides a photographic element comprising a dimensionally stable hydrophobic transparent polyester film support, at least one light-sensitive silver halide emulsion layer, and at the side of said support opposite to that of said emulsion layer(s), a subbing layer essentially consisting of poly-N-vinyl pyrrolidone, and an antihalation layer comprising carbon black dispersed in a water-insoluble alkali-soluble copolymer of 1 to 65% by weight of a C.sub.1 -C.sub.4 alkyl methacrylate, 10 to 79% by weight of a C.sub.1 -C.sub.8 alkyl acrylate, and 10 to 50% by weight of acrylic acid or methacrylic acid.

Abstract: An electrophotographic recording material comprising a conductive support and a photosensitive layer containing a photoconductive compound that has p-type charge generating capacity and is a trisazo compound which is the reaction product of the coupling reaction between a coupler compound that does not contain a carboxylic acid or sulphonic acid group and a diazonium salt represented by the following general formula (I): ##STR1## wherein: each of L, M and Y (same or different) represents a phenylene group including a phenylene groups substituted with one or more substituents selected from the group consisting of lower alkyl (C.sub.1 -C.sub.2), nitro, methoxy, ethoxy or halogen, or represents said phenylene group fused-on with the necessary atoms to close a saturated or unsaturated carbocyclic or heterocyclic ring or ring system including said ring or ring-system in substituted form, and X.sup.- is an anion.

Abstract: The sensitivity/fog ratio can be improved by using photographic silver halide emulsions containing gelatine which has a cysteine content of less than 10 ppm and a gold number of .gtoreq.23 .mu.mol/g.

Abstract: To produce outdoor advertising installations which are equipped to be illuminated and have different areas appearing, respectively, dark and light by daylight, with the brightness of the different areas being reversed by night under the influence of artificial light acting from the back, areas which appear bright by daylight on the outermost plate (information plate) are back printed with a bright covering and behind that with a dark covering and areas which appear dark by daylight are back printed dark with a regular pattern of lines or points.

Abstract: Particulate toner material for use in the development of latent electrostatic images, wherein said particulate toner material is capable of acquiring by triboelectric contact electrification a net positive charge and contains thermoplastic resin(s) as binder in combination with a colorant and a colorless compound capable of imparting a positive charge to the particulate toner material in contact electrification, wherein said colorless compound contains at least one piperidine nucleus substituted with an --NH-acyl group, N-substituted ureido or N-substituted thioureido group.

Abstract: Package for pancakes, consisting of plate-like plastic pallets (1) which protect the outer pancakes and, if necessary, raised rubs (3) in the center of the pallets, the diameter of which corresponds to the inside diameter of the bores of the winding cores and wherein the package can be sealed by means of a shrink film (4) coated thereon. The inner surfaces (2) of the plastic pallets (1) taper off in a sloping manner towards the outside at least in the region of the tape reel (5) of the pancakes, so that the inner surfaces (2) rest against the pancake in a uniform manner over the entire region of the tape reel (5) (FIG. 1).

Abstract: Dye-donor element for use according to thermal dye transfer methods, said element comprising a support having thereon a dye/binder layer comprising a 2-N-alkyl-substituted carbamoyl-4-[N-(p-substituted aminoaryl)-imino]-1,4-naphthoquinone cyan dye carried by a polymeric binder resin, said dye being a 2-N-alkyl-substituted carbamoyl-4-[N-(p-substituted aminoaryl)-imino]-1,4-naphthoquinone cyan dye, the N-alkyl group of which is methyl that is substituted with a branched-chain non-cyclic C.sub.3 -C.sub.18 alkyl group or the N-alkyl group of which is a C.sub.2 -C.sub.4 straight chain alkyl group that on its omega-carbon atom is substituted with a branched chain C.sub.3 -C.sub.18 alkyl group, an aryl group, or a cycloalkyl group.

Abstract: Method for the production of a multicolor filter array wherein individual color pixels are delineated by a light absorbing contour pattern, which method comprises the steps of:(a) providing a photosensitive dye receptor material being a photographic silver halide emulsion material incorporating at least one waterpermeable silver halide emulsion layer on a support and containing optionally a mordanting agent suited for fixing dyes in said silver halide emulsion layer and/or in another layer in waterpermeable relationship therewith,(2) depositing pixelwise different dyes or dye precursors compounds wherefrom dyes can be formed by chemical reaction on said photosensitive dye receptor material,(3) photo-exposing said at least one silver halide emulsion layer of said dye receptor material to a light pattern resulting in a latent image in the form of a contour line pattern delineating the individual color pixels obtained in said dye receptor material, and(4) developing said latent image to form in said dye receptor

Abstract: 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 formulaFe(X).sub.2 DTPA,whereinX denotes alkali or ammonium,as bleaching agent, and the stabilizing bath contains a fungicide, HEDP and a hexametaphosphate.

Abstract: An exposed and developed photographic filmstrip having a series of image areas is conveyed along a path and is photoelectrically scanned at a first location of the path to detect regions characterized by marked density jumps. A signal is generated in response to detection of each such characteristic region and a first distance measuring device disposed near the first location assigns a first distance reading to each characteristic region upon detection thereof. The first distance readings are representative of the positions of the characteristic regions longitudinally of the filmstrip. Each signal is stored together with the respective first distance reading. The stored signals and first distance readings are used to calculate the positions of the image areas longitudinally of the filmstrip, and the calculated positions are likewise stored. From the first location, the filmstrip travels to a second location of the path where a notch is punched in the filmstrip adjacent to each image area.

Abstract: Color images with improved Dmin/Dmax-relationship can be obtained from color photographic recording materials comprising color providing compounds in association to silver halide emulsion layers and comprising an additional binder in said silver halide emulsion layers or in adjacent non-lightsensitive layers a polymer having recurring structural units of a polymerized monomer which contains at least one urethane and/or urea group.

Abstract: A gradation variable black-and-white paper containing only one light sensitive silver halide emulsion layer in which transfer of sensitization is prevented may be obtained by sensitization with at least one compound corresponding to the following formula ##STR1## in which at least one of the groups R.sub.1, R.sub.5 or R.sub.6 is halogen.