Abstract: A method of color processing in which an imagewise exposed color photographic silver halide material is processed by a procedure which comprises treating it with a color developer solution and then with a developer/amplifier solution containing a color developing agent and hydrogen peroxide in which said solutions are replenished so that the overflow from the developer/amplifier solution is treated to remove hydrogen peroxide and used to form the sole replenisher for the color developer solution while the overflow from said color developer solution is disposed of as the net overflow of the two processing solutions.

Abstract: An imagewise exposed photographic silver halide color material is treated in a first processing bath containing a developer solution comprising a color developing agent. After treatment in the first bath, the photographic material is treated in a second processing bath containing a developer/amplifier solution comprising an amplifying oxidant and the color developing agent, wherein developer solution is carried over with the photographic material from the first bath to the second bath. The second bath is replenished with developer/amplifier replenisher solution. The first bath is replenished with developer replenisher solution in sufficient volume to cause overflow of the developer solution from the first bath, which overflow is conveyed from the first bath to the second bath. The concentration of the color developing agent in the developer/amplifier solution of the second bath is maintained at 0.1 to 20 g/l.

Abstract: According to the present invention a method for producing a negative image is provided, comprising the following steps:image-wise exposing an imaging element comprising on a support, a light-sensitive silver halide emulsion layer comprising silver halide grains having an average volume of not more than 0.02 .mu.m.sup.3 and a layer containing non-light-sensitive water insoluble silver salt, to produce a latent image in said layer of light-sensitive silver halidedeveloping said latent image to produce physical development nuclei of silverdissolving the non-light-sensitive silver salts using a silver salt complexing agent andallowing the thus formed silver salt complexes to diffuse to the layer containing said image-wise formed physical development nuclei of silver to image-wise deposit and develop said silver salt complexes on said image-wise formed physical development nuclei of silver in the presence of (a) developing agent(s).

Abstract: A method of forming a dye image in a photographic silver halide element containing a dye-providing compound and having in a layer thereof an imagewise distribution of catalytic silver which comprises the step of treating the material with a redox amplifying solution comprising a reducing agent and a redox amplification oxidant characterized in that the redox amplification oxidant is removed from the solution after use and the so-treated solution is re-used after the addition of fresh redox amplification oxidant.

Abstract: The present invention is directed to a method of processing imagewise exposed photographic color silver halide materials in which, after the dye image is formed, the photographic material is treated with an aqueous stabilizing solution containing iodide ions but no fixing agent.

Abstract: A light-stable physical developer comprising a solution of silver ions, a desensitizing agent and a reducing agent. A method for the detection of one or more components of an aggregate formed between at least one specific binding agent and its corresponding bindable substance by labelling at least one component of said aggregate with a marker and contacting said aggregate with said light-stable physical developer, whereby under influence of the marker a metal particle is formed which can be detected. Further the invention also relates to products, e.g. a test-kit adapted for carrying out the above mentioned method.

Abstract: A method of removing silver chloride from a photographic silver halide material during processing which comprises treatment with an aqueous fixing solution containing an alkali metal sulphite as sole silver halide solvent. to remove substantially all of silver chloride in less than 50 seconds.

Abstract: A method of locally providing metal on a surface of a substrate, in which the substrate is provided at the surface with an electrocatalythic image. The surface is then brought into contact with an electroless metal-plating solution. The electrocatalythic image is capable of binding metal to it from the metal-plating solution. Due to the fact that the image is brought into contact with the metal-plating solutin, the image is gradually strengthened with metal from the solution. With images smaller than 10 .mu.m, this strengthening is prevented, however, due to the fact that oxygen is present in the solution. Because oxygen is reduced, a reduction of metal ions in the solution cannot occur, as a result of which no metal deposition takes place on the image. According to the invention, the reduction of oxygen in the solution is counteracted at least relatively so that also in the case of images smaller than 10 .mu.m metal ions are reduced without hindrance to the metal, which is then deposited on the image.

Abstract: There is disclosed a light-sensitive silver halide photographic material having at least one silver halide emulsion layer on a support, which comprises the light-sensitive photographic material contains light-sensitive silver halide grains, metal salt grains having internal fog and a polyhydric alcohol having at least two hydroxyl groups having a melting point of 40.degree. C. or higher.

Abstract: Method and apparatus for intensification and reflective read-out of underexposed films, radiographs, and the like are shown which include means for converting a metallic silver particle image to a highly reflective image. The film containing the highly reflective image is placed in a black-walled cavity which may contain a particle-free liquid, such as water. The image is raster scanned by a laser beam, and light reflected from the image is detected by a photomultiplier. The photomultiplier output is digitized and the digitized signal is stored for subsequent computer enhancement and display.

Abstract: Producing metal images or patterns on and/or below the surface of a substrate material comprising a semiconducting light-sensitive compound, such as titanium dioxide or zinc oxide which after exposure of a metal compound releases this metal in the form of nuclei. Exposure takes place in the solution of the metal compound by means of a moving beam of laser light whereby the nuclei pattern is directly "written". Thereafter, the nuclei image is intensified in known manner to produce a visible image or a conductive pattern, for example by means of an electroless plating solution. Use: the recording of information as well as the production of printed circuit boards.

Abstract: Optical patterns formed by localized optical density or refractive index variations in glass are produced by impregnating a porous glass support with a photolyzable organometallic compound and selectively exposing the glass to a photolyzing light source to cause the photolytic decomposition of the organometallic compound in exposed portions of the glass. The patterns are fixed, if desired, by removing unreacted organometallic compound from the pores.

Abstract: A printed circuit board is formed by forming a negative resist pattern over the surface of a substrate, etching the surface, sensitizing and catalyzing the surface, stripping the negative mask and catalytic layer thereover leaving a positive catalytic circuit pattern on the substrate and electrolessly plating copper over the catalytic image. A preferred variation of this method includes flash plating a thin porous electroless deposit over the catalyzed substrate prior to stripping the resist layer.

Abstract: A chalcogenide such as As.sub.2 S.sub.3 is coated on a substrate at a very low rate of deposition in a vacuum evaporator and is coated with a thin silver layer. The silver coated layer is exposed to illumination in a quantity insufficient to form an etchable layer by conventional techniques and the silver is increased by treatment with a silver-containing agent capable of depositing silver on the image, preferably in the presence of radiation. NaAgSO.sub.3 is a presently preferred agent. The resulting image-bearing layer is photo-doped by exposure to band-gap radiation and the member is then etched.

Abstract: A photosensitive element comprising a support carrying photosensitive silver halide grains in a substantially predetermined spaced array and methods for forming such photosensitive elements.

Abstract: A method for making a laser recording and data storage medium by first exposing a Lippman emulsion to light in order to form a depthwise nuclei gradient, then physically developing the emulsion until a reflective surface layer of spheroid silver particles, having the desired degree of reflectivity, is attained and then chemically developing the remaining nuclei to form a dark underlayer of filamentary silver particles.

Abstract: A laser recording medium consisting of shiny silver particles in a colloid matrix having at least one superposed layer of colloid matrix containing dispersed metal particles other than silver to lower the reflectivity of the medium.

Abstract: A gold-toning neutron-activation process for intensifying or amplifying the ontrast in extremely weak images in photographic negatives where the exposure level may be as low as 1.5% of optimum. The method involves three main steps: (a) gold toning of the silver image on the negative; (b) neutron activation of the gold image to produce radioisotopes; and (c) transferring the image to an unexposed autoradiographic film as the ionizing radiation from the radioactive gold exposes the film to produce intensification of the contrast.

Abstract: A broadband laser recording and data storage medium for direct read after writing, formed from a photosensitive silver-halide emulsion in four steps. First, a non-saturating actinic radiation exposure is used to create latent images. A normal photographic development is used to produce a medium of gray neutral density. The surface of the remaining silver halide is fogged in a water or alcohol based solution to create a very thin layer of silver precipitating nuclei on the surface. Finally, a single-step, negative silver diffusion transfer process is used to dissolve the unexposed and undeveloped silver halide, forming silver ion complexes.

Abstract: Electrographic image patterns are developed using marking particles containing a catalyst or catalyst precursor. The developed image pattern is then amplified by contacting it with high gain chemical-redox amplification composition.

Abstract: A method of replicating data from a master transmissive optical data storage medium whereby the resulting product displays areas of low reflectivity and high reflectivity. Actinic radiation is shone through transmissive areas onto a silver-halide emulsion photosensitive medium. The photosensitive medium is then chemically developed black. Next, the developed medium is fogged to create a latent image layer of silver precipitating nuclei. Finally, the fogged medium is placed in a monobath comprising a weak silver-halide reducing agent and a rapid-acting silver-halide solvent for partial chemical development and substantial physical development. The resulting product displays areas of low reflectivity, which correspond to the transmissive areas of the master, in a reflective field.

Abstract: A broadband laser recording and data storage medium for direct read after writing, formed from a photosensitive silver-halide emulsion in four steps. First, a non-saturating actinic radiation exposure is used to create latent images. A normal photographic development is used to produce a medium of gray neutral density. The surface of the remaining silver halide is fogged in a water or alcohol based solution to create a very thin layer of silver precipitating nuclei on the surface. Finally, a single-step, negative silver diffusion transfer process is used to dissolve the unexposed and undeveloped silver halide, forming silver ion complexes.

Abstract: A method for making a reflective data storage medium by creating a volume concentration gradient of silver precipitating nuclei on one surface of a silver halide emulsion coated photoplate. This volume concentration is then built up by a silver diffusion transfer negative development using primarily solution physical development until the surface becomes reflective. Lastly, a thermal annealing step is used to increase reflectivity, recording sensitivity and produce a more uniform contrast ratio.

Abstract: A reflective laser recording and data storage medium, for direct reading after writing, formed from a photosensitive silver-halide emulsion wherein a surface latent image exposure on the recording area forms a depthwise gradient of silver nuclei. A single step negative silver diffusion transfer process is used to develop silver nuclei of the latent image and dissolve unexposed silver halide elsewhere, forming silver ion complexes. These complexes are transported by diffusion transfer to the developing silver nuclei sites where silver is precipitated and adsorbed to form a high concentration of non-filamentary particles at a surface of a low melting temperature dielectric matrix which is highly reflective of light and electrically non-conducting.

Abstract: A reflective laser recording and data storage medium, for direct reading after writing, formed from a photosensitive silver-halide emulsion wherein a surface latent image exposure on the recording area forms a depthwise gradient of silver nuclei. A single step negative silver diffusion transfer process is used to develop silver nuclei of the latent image and dissolve unexposed silver halide elsewhere, forming silver ion complexes. These complexes are transported by diffusion transfer to the developing silver nuclei sites where silver is precipitated and adsorbed to form a high concentration of non-filamentary particles at a surface of a low melting temperature dielectric colloid matrix which is highly reflective of light and electrically non-conducting.

Abstract: Additive method of manufacturing metal patterns on synthetic resin substrates, printed circuits in particular. A nuclear image of a desired pattern is obtained by means of a salt of a metal which may occur in more than one valency and a noble metal salt by inactivating the substrate area outside the desired pattern by photo-oxidation by means of exposure to light in the presence of oxygen. The ultimate metal pattern is deposited by electroless metal deposition on the nuclear image.

Abstract: Tellurium images are formed by the decomposition of tellurium (II) coordination complexes in the presence of a catalyst. The complexes are characterized in that at least one of the four coordination positions of the tellurium (II) is occupied by a sulfur containing ligand. Preferred ligands that can be coordinated with tellurium are sulfur containing bidentate anionic ligands. Complexes formed using these preferred ligands are more hydrolytically stable than other tellurium (II) complexes having sulfur containing ligands and yet are still capable of providing catalytic amplification.

Abstract: A photographic process comprising exposing imagewise a photosensitive layer containing a divalent tin basic salt to actinic rays to form a pattern consisting of non-reducing exposed areas and reducing non-exposed areas and contacting the exposed photo-sensitive layer with a developer capable of forming or erasing color by reduction to thereby form a visible image corresponding to said non-exposed areas or said exposed areas.

Abstract: Volume dielectric holograms are prepared by methods which have in common the intra-emulsion diffusion transfer of silver atoms within the emulsion by a process of dissolving undeveloped silver halide, and diffusing and precipitating said dissolved silver on precipitation sites provided by the development of the exposed silver halide. The resulting metallic silver is then rehalogenated to substantially reconstitute the original silver halide volume of the emulsion.

Abstract: A method of depositing a metal on a surface is disclosed. The method comprises coating the surface with a sensitizing solution comprising at least a reducible salt of a non-noble metal. The coated surface is selectively treated to reduce the metal salt to metallic nuclei to form a catalytic pattern thereon capable of directly catalyzing the deposition of a metal on the nuclei from an electroless metal deposition solution. The selectively treated surface is then exposed to a stripping solution comprising an organic acid selected from (a) a carboxylic acid having a structural formula of ##STR1## where R is a member selected from the hydrogen radical, H, and an alkyl group having 1 to 3 carbon atoms, (b) citric acid and (c) a mixture of any of the foregoing acids, to essentially remove portions of the coated surface which have not been selectively treated.