Abstract:
APPARATUS FOR DEVELOPING SHEET MATERIAL INCLUDING A RECORDING LAYER HAVING DIFFERENTIALLY SOLVENT-SOLUBLE AREAS THEREIN BY REMOVING THE MORE SOLUBLE AREAS. THE APPARATUS CONSISTS OF COOPERATING SHEET RUBBING MEMBERS AND SQUEEZE ROLLERS WHICH ARE CARRIED RESPECTIVELY WITHIN THE ABOVE A CONTAINER OF SOLVENT ON FRAME SECTIONS HINGED TOGETHER ABOUT A HORIZONTAL AXIS AT THEIR LOWER ENDS. THE HINGE PERMITS THE RUBBING MEMBERS AND ROLLERS TO BE SEPARATED FOR THE ADMISSION OF THE SHEET MATERIAL AND BROUGHT TOGETHER FOR FRICTIONALLY ENGAGING THE SHEET MATERIAL ON REMOVAL THEREOF FROM THE CONTAINER BY ROTATION OF SAID SQUEEZE ROLLERS. AT LEAST ONE RUBBING MEMBER HAS A SURFACE OF POROUS RESILIENT MATERIAL FOR CONTACTING SAID RECORDING LAYER.
Abstract:
A RECORDING LAYER OF FINELY DIVIDED THERMOPLASTIC PARTICLES IS IMAGEWISE HEATED TO WATER-IMPERMEABILITY AND A MELTABLE MATERIAL LIKE A WAX WHICH MELTS BELOW THE TEMPERATURE OF WATER-IMPERMEABILITY OF THE THERMOPLASTIC PARTICLES AND IS EITHER CARRIED IN THE THERMOPLASTIC PARTICLE LAYER OR IN A LAYER UNDER IT IS HEATED TO MELTING AND DIFFUSES THROUGH THE UNHEATED AREAS OF THE THERMOPLACTIC PARTICLE LAYER TO A RECEIVING SUPPORT.
Abstract:
A method of and material for recording information using a recording material having a water-permeable recording layer consisting essentially in one embodiment of a continuous phase of film-forming hydrophilic colloid binder having uniformly distributed therethrough finely divided particles of a hydrophobic oil, wax, or thermoplastic polymer, together with finely divided particles of an inorganic photoconductive compound, and in another embodiment of a continuous phase of a film-forming hydrophilic colloid binder having uniformly distributed therethrough finely divided particles of a hydrophobic oil, wax, or thermoplastic polymer, together with a water-soluble organic photoconductive dye, wherein such recording layer is imagewise exposed to active electromagnetic radiation to render the exposed areas substantially impermeable to water, while the unexposed areas remain permeable but without significantly increasing the temperature of such layer and is thereafter developed by contacting the same with an aqueous liquid to produce a visible change by penetration or removal of the unexposed regions of the layer by such liquid. The binder should be present in a ratio of about 1:1 to 1:10 relative to the hydrophobic particles, while the photoconductor is present in a ratio of 1:3 to 5:3 in the case of an inorganic photoconductor and at least about 0.05 percent by weight in the case of the organic photoconductive dye, both relative to the hydrophobic particles.
Abstract:
A process for producing planographic prints wherein the printing plate is prepared from a heat-sensitive recording material formed of a support, an interlayer of a water-permeable hydrophilic colloid and an external water-permeable layer of at least one hydrophobic substance which melts on heating and in such molten condition is absorbed into the hydrophilic colloid interlayer by exposing such recording material to a pattern of heat to bring about differential absorption of the hydrophobic substance in the heated regions of the layer thereof to thereby expose portions of the hydrophilic layer in a pattern corresponding to the heat pattern. The planographic plate thus produced is inked with a generally hydrophilic printing ink selectively adhering to the hydrophilic portions, and the ink is transferred to a copy material to produce the desired print. Preferably, the hydrophobic substance is miscible or compatible in its molten state with the hydrophilic colloid of the interlayer. A particularly useful printing ink consists of a colored hydrophilic continuous phase in which is dispersed a lipophilic phase of coloration distinct from that of the hydrophilic phase.
Abstract:
Recording layers of the type disclosed in U.S. Pat. No. 3,476,937 are used for subtitling photographic film, particularly motion picture film. A heat and/or pressure sensitive layer of such type is applied as an over-coating on the film to be subtitled, exposed to a heat pattern according to the subtitle so as to reduce the water permeability of the heated areas thereof, contacted with an aqueous liquid chemically degrading the binder in such layers so that the layer is removed in the heated areas, after which the film which carries the developed photographic image in a conventional emulsion layer thereon is contacted with a liquid, which may be the same liquid used to chemically degrade the overlayer, which either degrades the binder of the conventional emulsion layer to permit removal thereof or bleaches the visible image-forming material, i.e., the developed silver image or colored dye image, in the emulsion layer, the degradation or bleaching effect taking place in the areas where the overlayer has been removed. The remaining areas of the overlayer can be finally removed by rubbing the same while wet with an aqueous liquid.
Abstract:
An improvement on U.S. Pat. No. 3,476,937 wherein the recording material contains, in addition to a continuous phase of hydrophilic binder and a dispersion phase of thermoplastic hydrophobic particles in a weight ratio relative to the binder of at least 1:1, a light-sensitive silver halide and a developing agent for such halide present in the surface layer and/or in an adjacent underlying layer so that exposure and photographic development by means of an alkaline solution produces a silver image in heat-conductive relationship with the thermoplastic particles and subsequent uniform exposure by the developed silver image, the heat generated in the silver image by such absorption rendering the areas of the surface layer in heat-conductive relationship therewith relatively less hydrophilic.