Abstract: A photosensitive system comprising in intimate admixture (1) a dye in its leuco form, (2) a photooxidant taken from the group of hexaarylbiimidazole compounds, benzophenone, para-aminophenyl ketones, polynuclear quinones and thioxanthenones, and mixtures thereof and in the presence of the admixture is a 5-member-heterocyclic phenylhydrazide compound. The cyclic phenylhydrazide can be present in the admixture, or a dry coating of the admixture, after imagewise exposure, is treated with a solution of the heterocyclic compound. The system is useful in formation of colored images.

Abstract: In a light-sensitive material for tanning development containing unhardened or only slightly hardened gelatin silver halide emulsion layers, the silver content required to obtain maximum density is reduced by incorporating carbon black pretreated with water-miscible compounds which have a higher affinity for carbon black than gelatin. Suitable treatment may be provided by at least two of the following: poly-n-vinyl lactams, polyalkylene oxide derivatives, water-miscible compounds containing at least two OH groups, and polyalkylene oxides with a molecular weight of at least 400.

Abstract: A photographic light sensitive material which contains, in at least one layer, a copolymer having a repeating unit represented by the following general formula (I): ##STR1## wherein R.sub.f represents a perfluoroalkyl group having 2 to 12 carbon atoms which may contain one hydrogen atom at the .omega.-position or a perfluoroalkenyl group; R represents a hydrogen atom or a methyl group; p represents an integer of 1 to 5; m represents an integer of 5 to 50; n represents zero or an integer of 1 to 20; and Y represents a hydrogen atom, an alkyl group having 1 to 24 carbon atoms, an alkenyl group, a phenyl group, an alkylphenyl group or one of the groups represented by R.sub.f ; whereby antistatic property (even under low humidity) and adhesion resisting property are improved without adversely affecting photographic characteristics.

Abstract: A negative image silver halide photographic emulsion comprising substantially surface latent image type monodispersed silver bromide or silver iodobromide grains containing up to about 10 mol% silver iodide, wherein the average grain size of the silver halide grains is about 0.7 micron or less, with the silver halide photographic emulsion containing a binder in an amount of about 250 g or less per mol of silver halide and a compound represented by the following general formula (I):R.sup.1 NHNHCOR.sup.2 (I)wherein R.sup.1 represents an aryl group and R.sup.

Abstract: A lithographic printing plate in which the oleophilic imaging areas are formed as a thin cross-linked block copolymer film adhered to the hydrophilic surface of a backing plate. The block copolymer comprises blocks of copolylacrylate and polyurethane wherein the copolyacrylate blocks are a copolymer of a hydroxy-containing acrylate and a second acrylate component comprising one or more esters of acrylic acid or methacrylic acid or mixtures thereof and the polyurethane blocks are formed of polyoxybutylene as the prepolymer component. In forming the printing plate the block copolymer is deposited as a thin film containing an ultraviolet initiator and a cross linking promoter and the cross-linked imaging areas are formed by exposure to ultraviolet radiation.

Abstract: Within the vacuum atmosphere containing oxygen a cylindrical rotary can and an evaporation source are disposed in opposed relationship and in such a way that the normal line constructed at the center of the evaporation surface of the evaporation source will not intersect the axis of the cylindrical rotary drum. The beam of the evaporating ferromagnetic substance is directed to and impinged against the substrate transported along the rotary drum at right angles to the direction of transport thereof.

Abstract: Screen printing stencils are prepared by affixing to a printing screen substrate an indicia-defining, ultraviolet-sensitive film and cross-linking the film by exposure to ultraviolet radiation. The coating compositions used to form the film comprise copolyacrylate/polyurethane block copolymers, in which the copolyacrylate blocks are copolymers of at least one hydroxy-containing acrylate and at least one acrylate or methacrylate which may be partially substituted with bromine, ultraviolet initiators and cross-linking monomers. Screen printing stencils are provided which are compatible with both water-based and oil-based inks. The disclosed screen printing stencils are used in improved screen-printing methods.

Abstract: A negative exposure mask is prepared by forming a positive mask image of a first metal layer on a transparent substrate and applying a layer of resist which is exposed through the back of the substrate and developed to form a lift-off mask. The lift-off mask is used to form a negative mask image of a second layer of metal on the substrate in the areas not covered by the first metal layer. The first metal layer is then etched away to leave the negative mask image on the substrate.

Abstract: A heat-developable photosensitive material which comprises a support having thereon at least one layer containing (a) an organic silver salt, (b) a catalytic amount of a photosensitive silver halide or a compound which forms a photosensitive silver halide, (c) a reducing agent, and (d) at least one sensitizer selected from the group consisting of compounds represented by the formulae (I) and (II): ##STR1## wherein R represents an unsubstituted or substituted alkyl group having 1 to 4 carbon atoms or an aryl group; and Q represents a group of atoms necessary to complete a rhodanine nucleus, a thiohydantoin nucleus or a 2-thio-2,4-oxazolidine-dione nucleus and wherein said compound represented by the formulae (I) and (II) include at least one carboxyl group as a substituent, and (e) a binder.

Abstract: A method of preparing photographic silver iodobromide or iodochloride emulsions the silver halide crystals of which are of the twinned octahedral or cubic type, which emulsions have improved homogeneity of iodide content and controlled size distribution of the crystal grains, comprising the following steps:(a) Forming a monosized silver iodide dispersion in gelatin;(b) Mixing in the silver iodide dispersion aqueous solutions of silver nitrate and alkali metal or ammonium bromides or chlorides in order to form twinned crystals;(c) Performing Ostwald ripening in the presence of ammonia solution and a controlled silver ion concentration to increase the size of the twinned crystals and dissolve any untwinned crystals;(d) Optionally increasing the size of the twinned crystals by the further addition of silver and halide ions; and(e) Chemically sensitising the emulsion.The new photographic emulsions exhibit a high covering power and contrast on development.

Abstract: A processor for developing diazo film defined by a pair of flat platens disposed within a housing and spaced apart a distance only slightly greater than the thickness of the film. The housing includes intake and outlet openings aligned with the space between the platens and means for advancing an incoming film from the intake opening, through the space between the platens and for discharging it through the outlet opening. The platen facing the emulsion side of the film is heated and includes at least one passage through which a metered amount of aqueous ammonia is passed for each film that is to be developed. The ammonia is vaporized in the passage and discharged against the emulsion side of the film. A transverse groove in the emulsion facing surface of the platen communicates with the passage to distribute the ammonia vapor over the full width of the film. The developing temperature is between about 150.degree.-200.degree. F.

Abstract: A light-sensitive silver halide photographic material having a cellulose ester film support coated on one side with a silver halide emulsion layer and on the other side with a non-light sensitive layer that is removable during an aqueous processing step. An optional portion of the non-light sensitive layer is coated with a magnetic recording layer formed from a dispersion containing at least 60% by weight of 2-ethoxyethanol. The resulting magnetic recording layer exhibits layer adhesion during subsequent development steps.

Abstract: Disclosed is an alkali-soluble photosensitive composition having an excellent stability in photosensitivity and developing property over a long storage time and a high ink-sensitivity. The composition comprises an aromatic azido compound and a novolak resin prepared by condensation polymerizing, in the presence of an acid catalyst, formaldehyde, a phenol compound of the following formula (I) and another phenol compound or compounds of the following formula (II) and/or formula (III). ##STR1## wherein, R.sub.1 =H or -CH.sub.3, R.sub.2 =alkyl of 3-15 carbon atoms, phenyl or cyclohexyl, and R.sub.3 and R.sub.4 =alkyl of 1-3 carbon atoms.

Abstract: A silver halide multilayer color sensitive material comprising a red-sensitive silver halide emulsion layer, a green-sensitive silver halide emulsion layer and a blue-sensitive silver halide emulsion layer on a support, wherein each silver halide emulsion layer contains a non-diffusible image forming coupler, the improvement which comprises at least one of the silver halide emulsion layers comprising an upper unit silver halide emulsion layer, a middle unit silver halide emulsion layer and a lower unit silver halide emulsion layer, in which the sensitivity of the three unit silver halide emulsion layers decreases in order from the upper unit silver halide emulsion layer to the lower unit silver halide emulsion layer, and at least the middle unit silver halide emulsion layer contains a development inhibitor releasing compound.

Abstract: Photopolymerizable compositions for the manufacture of relief printing plates, especially relief plates for making mats, comprising an alcohol-soluble linear polyamide, a photoinitiator and a mixture of (a) a diether or triether obtained from 1 mole of an aliphatic diol or triol and from 2 to 3 moles of N-hydroxymethylacrylamide or N-hydroxymethylmethacrylamide and (b) an unsaturated ester-urethane obtained from 1 mole of toluylene diisocyanate and 2 moles of a hydroxyalkyl acrylate or methacrylate, (a) and (b) being mixed in specific ratios.

Abstract: A thermally developable light-sensitive material containing at least (a) an organic silver salt, (b) a photocatalyst and (c) a reducing agent in a support and/or in one or more layers thereon and, additionally containing (d) at least one phthalazinone, and (e) at least one phthalimide, having improved shelf life particularly at high humidity, providing pure black tone images, and further providing a high speed upon heat development.

Abstract: Light-sensitive compositions containing a quinone diazide which are useful in positive-working photoresists and positive-working lithographic printing plates are developed with a developing composition comprising methyltriethanol ammonium hydroxide. The developing composition provides the advantage that it is free of metal ions and, accordingly, does not contaminate the surface of the image. It is additionally advantageous in that it provides extended development latitude, increased exposure latitude, improved resist contrast, improved prebake latitude, a low depletion rate and minimal loss of image layer thickness.

Abstract: A method of preparing color separated font characters and components in which positive proofs of the characters of the font intended for color printing are arranged by rows in linear spaced relation with the color components of each character of the font disposed one above the other on a flat plane in predetermined spaced relation. The color separated components and characters of the font are then printed on a transparent film for subsequent transfer of selected characters of the font to a layout sheet for photographic reproduction and forming plates or engravings to be printed in two or more colors.

Abstract: A method of processing photographic silver dye bleach materials which have been exposed imagewise is provided. The process steps are (1) silver developing, (2) dye bleaching, (3) silver bleaching and (4) fixing. The treatment baths for the process steps (2), (3) and (4), or the combined treatment baths useful for process step (3) with at least one the process steps (2) or (4) contain water-soluble tertiary phosphines as silver ligands. These phosphines effect an acceleration of the dye and silver bleaching and they are further suitable stabilizers and optionally antioxidants which yield stable treatment baths.

Abstract: A film or paper for producing a colored image from a monochromatic source image comprising four silver halide emulsion layers. A first layer of slow speed emulsion produces an underexposed negative image while a second layer of slow speed emulsion produces an underexposed positive image. The two remaining layers of fast speed emulsion produce an overexposed positive image and an overexposed negative image.A novel process is disclosed wherein the film or paper is developed in a first developer and only two emulsion layers given reversal exposure. The four emulsions are then developed to three opposite tonal gradations in the three subtractive primary colors, thereby producing a false color image.