Abstract: A sharp imaging, non-smearing system for latent imaging and subsequent visual development of printed text or the like is provided which can be used on a variety of substrates (e.g., paper, metal, cloth, synthetic resins) and is extremely stable and easy to use. The system involves first imaging a substrate with an invisible ink containing a dissociable transition metal salt such as CuSO.sub.4, with subsequent application of a liquid developer containing a solubilized color precursor such as thiooxalic amide which complexes with dissociated transition metal ion to give a sharp, virtually instantaneously developing, long lasting color. Depending upon the metal salt selected, different colors can be obtained upon development. The system of the invention can be used in a variety of contexts, such as in self-testing materials or novelty items.

Abstract: A carbonless copying color developer comprising a thermoplastic chelated metal modified phenolic resin formed from the in situ reaction of formaldehyde with a mixture of a para-substituted phenol, salicyclic acid, and a metal oxide. The reaction is conducted under hydrous conditions and at atmospheric pressure, with substantially no unreacted metal oxide residue.

Abstract: This invention relates to a new means, generally in kit form, for developing into a visible form fingerprints left on a solid surface, based upon the generation of a vapor-like phase of a cyanoacrylate material, alone or with functionally enhancing additives. This invention further relates to a process utilizing the exothermic polymerization reaction of cyanoacrylate compound, to generate a conjugable vapor-like phase.

Abstract: A method and kit for developing and fixing latent fingerprints on a solid surface is disclosed. The object to be examined for latent fingerprints exposed to fumes which contact the object to develop and fix any latent fingerprints on the surface of the object. The fumes are generated by depositing liquid cyanoacrylate monomer onto a shaped, self-supporting fiber plug constituted by cellulose acetate fibers and a glycerol ester-type plasticizer.

Abstract: A thermal-sensitive record sheet copy system provides multiple copies by applying a coating to one record sheet. The single coating formulation includes ingredients which react to heat to provide a tacky condition having a desirable adhering property and thereby produce images on the two sheets. The coating includes a binder of synthetic polyterpene in the mixture in combination with a thermochromic dye and a phenolic resin.

Abstract: The present invention is a vapor phase activator pad which produces fluorescent vapor fumes for use in a self-contained fingerprinting kit. The vapor phase activator pad is placed into an enclosed area order to fume an object in the area suspected of containing latent fingerprints. The vapor phase activator pad includes a fluorescent dye impregnated gauze pad and a composition. The composition consists of specified chlorinated organic solvents. The gauze pad is chemically treated with the composition so that when a quantity of alkyl-cyanoacrylate is placed onto the vapor phase activator pad. The vapor phase activator pad generates fluorescent vapors of the chemical cyanoacrylate wherein the latent fingerprints become exposed when an ultraviolet light source is shined on the object suspected of containing the latent fingerprints.

Abstract: A printing medium which includes a substrate coated with a compound of the formula: ##STR1## wherein R.sub.3 is a ring group having certain substituents in at least one ortho position with respect to the atom connected to C.dbd.O; and each R.sub.1 and R.sub.2 individually is aryl or alkaryl or are interconnected to form with the nitrogen atom a phenothiazine, phenoxazine, or phenazine or substituted derivative; and coated with an oxidizing agent or reduced form thereof; and method of use.

Abstract: Coating compositions for the production of a pressure-sensitive recording material based on a color former composition and a color developer composition. The color developer composition contains, as developer, at least two water-soluble inorganic metal salts, at least one of which is a nitrate, and is preferably in the form of a wax emulsion. Preferred color developers are mixtures of halides and nitrates.

Abstract: Method of manufacturing an article of synthetic resin which has an electroless provided metal layer in which a mixture of monomeric acrylates and an N-substituted pyrrolidon compound is polymerized, the resulting article is treated with an aromic carboxylic acid substituted with one or more hydroxy groups and/or an amino group, or derivatives thereof, and a metal layer is then provided on the thus treated article by electroless deposition.

Abstract: Potassium hydroxide or another alkaline potassium compound is used to adjust the pH of an aqueous color developing clay coating composition in the manufacture of color developing material for use in pressure-sensitive or similar copying systems. This reduces the decline in reactivity with time of such material and increases initial print intensity compared with conventional material in which the corresponding sodium compound is used for pH adjustment. Especially good results are obtained where the material being coated is a paper of high acidity such as results from rosin/alum sizing.

Abstract: A method of and composition for developing latent fingerprints on various surfaces including but not limited to glass, plastic, various metals such as copper, brass and the like and other materials such as paper which involves subjecting the latent fingerprints to gaseous fumes produced by cyanoacrylate ester, sodium bicarbonate and sulfur which will develop the latent fingerprints in a very short period of time thereby enabling the fingerprints to be easily lifted by conventional techniques for comparison with known fingerprints. The method of developing latent fingerprints of this invention may be used at the site of a crime by providing the fumes in a pressurized container so that the fumes can be directed into contact with the surface on which the latent fingerprints appear. The method is also effective at the laboratory by providing a container of sufficient size to receive the article or articles on which the fingerprints occur and a quantity of the composition which produces the fumes.

Abstract: A method of preparing a letterpress printing plate from a liquid photopolymer using an air knife to etch out the unpolymerized liquid to leave the relief image. A new printing plate substrate is used that has a laminae that is paper and a lamina that is a sealing coat on the paper. The paper is a special paper known as tag stock that is 5 to 20 mils thick, has tensile strengths of at least 30 pounds per inch in width in the press direction and at least 20 pounds per inch in width in the cross press direction, and fibers that are independently colored with a dark color having a good light absorption/reflectivity ratio.

Abstract: Transfer-printing supports, which are impregnated or printed with a formulation containing a mixture of a blue disperse dyestuff which sublimes readily and has the formula ##STR1## in which X is hydrogen or halogen, R, R.sup.1 and R.sup.2 denote alkyl with 1 to 4 carbon atoms and R.sup.3 denotes hydrogen or alkyl with 1 to 4 carbon atoms, and yellow to red disperse dyestuffs which sublime readily, give deep and fast black dyeings on polyester materials and polyester mixed materials by the heat transfer-printing process.

Abstract: A layer of an ion exchanged glass is utilized as the master for video disc production. Due to the ion exchange, such glass possesses stored energy in the form of compressive stress. When localized portions of the layer of ion exchanged glass are heated sufficiently, those portions of the glass soften and release the compressive stress energy in the form of localized surface bumps. The presence or absence of surface bumps and/or their height can convey the video information in analog or binary form. Once the ion exchanged master is formed, the master is used in a conventional manner to produce mirror image copies on a suitable, conventional substrate, generally a plastic. The copies are generally formed by a pressing or stamping technique, or by an injection molding technique. The relief surface of the copies can be coated with a conventional light reflective layer to aid in optical read-out of the video information stored by the relief surface.

Abstract: Fingerprints images are formed by applying the distal portion 29 of a finger 32 to a porous pad 10 impregnated with a solution of marking compound. The finger portion may be prewetted or cleaned with cloth 30 impregnated with detergent solution. The finger 32 is then applied to a square 36 of a fingerprint card 38 impregnated with an aqueous solution of polyhydroxy developer such as 8-hydroxy-quinoline and propyl gallate containing a high molecular weight dibasic acid such as azelaic acid. A fingerprint image 40 immediately develops. Traces of the image can be removed with a cleaning solution impregnated cloth 42.

Abstract: The method of and means for the production of markers for the cutting of fabric or material in the garment or allied industries comprising forming a latent electroscopic image pattern on the surface of a dielectric master and toning the image with a primary toner and transferring the primary image toner to a conductive receiving member and fixing and then toning the fixed image with a secondary toner and transferring optionally to the fabric or material or to multiple copy members for marking fabric or material.

Abstract: A hidden image, which can be made detectable by rubbing, is produced by applying to a substrate surface a first ink-like material in image configuration, then applying a second ink-like material to cover the image and an area surrounding the image. Each of the first and second ink-like materials contain one of a color-forming pair of reactants which are colorless or light colored in their unreacted states, but which together produce a colored product when brought into reactive contact. Separation of the two reactants is assured by encapsulating at least one of the reactant pair. Reactive contact is caused by rubbing the printed area or otherwise applying sufficient pressure to rupture the capsules, releasing one of the reactants into intimate contact with the other reactant.

Abstract: Coating compositions for the production of a pressure-sensitive recording material based on a color former composition and a color developer composition. The color developer composition contains, as developer, at least two water-soluble inorganic metal salts, at least one of which is a nitrate, and is preferably in the form of a wax emulsion. Preferred color developers are mixtures of halides and nitrates.

Abstract: A process for reproducing graphic information wherein a magnetic image is formed in a premagnetized layer of acicular chromium dioxide by heating the chromium dioxide selectively to above its Curie point. Ferromagnetic toner particles are then applied uniformly to the chromium dioxide layer, so as to adhere only in the magnetized areas. The toner particles are electrostatically transferred to a substrate and fused into position. Alternating current coronas or other static neutralizing devices are used to neutralize unwanted charges on toner particles which would otherwise cause fuzzy images and unwanted background markings on the final copies.

Abstract: Two-color recording paper comprising an ink film and a thermosensitive recording paper which are separably mated together. The ink film has a thin film base and an ink layer of a first hue coated on the film base. The ink layer contains a mixture of a colored material such as dye with a thermoplastic material which is solid at ordinary temperature and becomes fluid at high temperature. The thermosensitive recording paper has a substrate and a coloring layer coated on the substrate. The coloring layer contains a developer which colors in a second hue different from the hue of the ink layer. The ink film and the thermosensitive recording paper are overlapped separably with an ink surface of the ink film and a coloring surface of the thermosensitive recording paper facing each other.

Abstract: The invention relates to a developable surface comprising a carrier layer having thereon at least two deposits of one or more invisible inks in adjacent or overlapping relationship, said deposits in the developed state being unresolvable.

Abstract: A pressure-sensitive copying material which employs a color-producing substance and a color substance-accepting material is disclosed. The color substance-accepting material contains, as reaction components, a chloride of a metal having an atomic weight of from 50-66, together with a urea or its derivatives and a binding agent. The color-producing substance includes a dyestuff which is combined with the binding agent and reacts with the color substance-accepting material during color formation.

Abstract: A method of marking plastic lenses to selectively identify a lens by impregnating a fluorescent material into the surface of the lens so that when the lens is exposed to ultraviolet light it fluoresces.

Abstract: An apparatus which develops a latent image by advancing a conductive developer composition comprising marking particles into contact therewith. The apparatus interacts with the developer composition causing the developer composition to have higher and lower regions of conductivity. In the regions of higher conductivity, development of the solid areas within the latent image is optimized. Development of lines within the latent image is optimized in the regions of lower conductivity.

Abstract: This invention relates to an apparatus and method for developing latent fingerprints on an object by fuming said object with the vapors of the chemical cyanoacrylate. Apparatus is disclosed comprising a first chamber to contain the object and to close to form an air tight seal, a second chamber to contain the chemical pool and vapors thereof and a pump system. The method involves pumping the vapors from the second chamber into the first chamber to develop the latent fingerprints on the object to be tested.

Abstract: Copy sheet comprising substantially transparent dye layer which can undergo color shift in response to color developer composition. Preferred dye comprises pH sensitive dye and preferred color developer comprises weak acid.

Abstract: A plastic surface-printing method which comprises the steps of drawing an image on a plastic surface by an ink composition containing a coloring material; enclosing the printed plastic surface in a cover wherein there is placed a flash discharge tube; causing the flash discharge tube to emit light beams to irradiate heat pulses on the printed plastic surface; applying pressure on the printed plastic surface due to the expansion of air in the cover resulting from the application of heat pulses; and fixing an inked image on the plastic surface.

Abstract: Color developing ink suitable for pressure-sensitive recording, especially applicable to printing machines utilizing relief and offset printing techniques, which comprises (i) at least one proton-releasing or electron accepting solid acid selected from the group consisting of phenol resins, aromatic carboxylic acids and the metal salts thereof, and (ii) an aliphatic ester containing 8 to 25 carbon atoms, and which has stable printing aptitude and adequate color developing ability, does not swell a rubber roll installed in a printing machine and can provide colored image with excellent light resistance.

Abstract: A plurality of fingerprints of a person are recorded by applying a solution of a first substantially colorless chemical reagent to the fingertips. Essentially invisible fingerprints are obtained by gently pressing the fingers having the solution of the first chemical reagent thereon on a suitable recording sheet. Subsequently the recording sheet is exposed to sublimed vapors of a second chemical reagent. The first and second chemical reagents are selected to react with one another to yield a highly colored substance which is formed on the surface of the recording sheet providing a visible image of the fingerprints. Ferric chloride and a 8-hydroxyquinoline are ideally suited chemical reagents for use in this invention. An apparatus of unitary construction incorporating a replaceable dispensing pad having the solution of the first chemical, is disclosed.

Abstract: A first method of revealing a fingerprint involves the charging of the surface bearing the fingerprint to a high electric potential and applying finely divided carbon to the charged surface to form a pattern thereon corresponding to the fingerprint.The finely divided carbon may be dusted or sprayed on or may be in suspension in a dielectric liquid into which the charged surface is introduced.In another method the surface is charged while submerged in the dielectric liquid, under the action of an electric field in the dielectric.In another method an electrically charged sheet is brought into contact with a surface bearing a fingerprint and after being removed, the charged sheet has applied to its surface finely divided carbon which adheres thereto depending on the charge pattern remaining thereon after contact with the fingerprint.The pattern of finely divided carbon can be fixed in position by applying thereover a transparent protective layer.

Abstract: An agent for protecting the surface of a lithographic printing plate which is an emulsion comprising an oil phase containing a plasticizer having a solidifying point of 15.degree. C. or less and a surfactant, and an aqueous phase having dissolved therein a hydrophilic high molecular weight compound.

Abstract: The present invention provides a heat-sensitive recording sheet which is composed of a support and a heat-sensitive layer formed on said support, said heat-sensitive layer consisting essentially of a color-developable substance and an organic acid substance capable of making said color-developable substance develop a color when heated and containing at least one member selected from the group consisting of condensate of higher fatty acid amide and formaldehyde and condensate of higher fatty acid and ethylene diamine and at least one member selected from the group consisting of vegetable waxes and mineral waxes.

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 fade resistant, visually undetectable identification mark is imparted to an optically clear plastic lens or the like by providing a marking composition comprising a fluorescent dye and a liquid carrier material, and preferably including an inert sublimable solid diluent, applying the composition in a selected pattern on the surface of an article to be marked, removing the carrier material from the composition to leave a solid residue of the fluorescent dye and inert solid diluent, and permanently transferring the dye to a surface layer of the article as by heating. The mark enables a manufacturer to identify a particular article as its product by exposing it to ultraviolet radiation, yet the mark does not adversely affect the visible light optical properties of the article.

Abstract: Color-forming precursor compositions comprising a metal-complexing compound having a plurality of ligand groups and color-activating compositions comprising transition metal salts of oleophilic, organic acids are combined to form dark, permanent images on substrates. The methods and compositions are particularly useful for providing permanent fingerprints and other dermographs.

Abstract: An infra-red responsive fingerprint composition and method for manufacturing by sifting and mixing a minor proportion of finely divided carbon black (50 to 75 millimicrons) and a major proportion of infra-red responsive finely divided pigments containing milori blue (250 to 400 mesh), manganese dioxide (300 to 400 mesh), aluminum powder (1 to 75 microns) and mica (10 to 20 microns). A small amount of gum arabic as binder is included to facilitate adhesion of the print powder to latent prints. On white surfaces the fingerprint powder is black. On dark surfaces the fingerprint powder is brightly reflective so that when lifted or transferred to a white backing the color changes from brightly reflective to black. The reflective color becomes even more vivid under infra-red. Storage is preferably in tightly sealed containers in the presence of dessicant capsules to prevent moisture pick-up and caking of the gum arabic.

Abstract: A novel metal modified novolak resin is prepared. The metal modified novolak resin is an electron acceptor and is further characterized by its compatability with the surface properties of a paper substrate. The metal modified novolak resin comprises a reaction product of a novolak resin and a metal salt. The novolak resin is a reaction product of a mixture containing a para-substituted phenol selected from the group consisting of paraalkylphenols having alkyl groups of about 1 to about 12 carbon atoms, para-phenylphenol and mixtures thereof, salicylic acid and formaldehyde.The novel metal modified novolak resin is prepared by heating a mixture containing one or more para-substituted phenols, salicylic acid, formaldehyde and an acid catalyst for a period of time sufficient to substantially completely react the phenols, salicylic acid and formaldehyde to form a melted novolak resin. The melted novolak resin is mixed with a zinc salt in an inert atmosphere to form the metal modified novolak resin.

Abstract: Aqueous solutions are provided for treating image-bearing lithographic plates.

Abstract: Aqueous solutions are provided for treating image-bearing lithographic plates.

Abstract: Hidden entries are provided on a receptor sheet by applying the desired intelligence to the sheet with a chemical densensitizing agent capable of preventing the formation of a visible image on the receptor sheet when the sheet is contacted with a mark-producing agent. The resulting visible image is provided in the form of a negative wherein the background of the visible image is provided by the mark-forming agent, while the foreground of the visible image is the densensitized portion of the sheet. The mark-forming system comprises a chromogenic composition which is applied to the surface of the receptor sheet adjacent the desensitized portion thereof. The coreactant for the chromogen may either be present on the receptor sheet prior to providing the hidden image thereon by means of a chemical desensitizer, or may be admixed with the chromogen prior to application thereof to the surface of the sheet.

Abstract: This invention relates to materials and methods used in informational, testing, educational, amusement and other paper-based feedback systems embodying invisible images comprising a color-forming reactant material which can be rendered temporarily visible by the application of a coreactant. The systems may also include visible printed images and are suitable for multiple reuse.

Abstract: This invention relates to alkali developable, paper-based systems printed with invisible phenolphthalein inks and made reusable through many development cycles by employing critical concentrations of dye reactants in conjunction with a paper having a defined water soluble acidity-alkalinity.

Abstract: A magnetic image decorator is disclosed wherein two or more rotatable cylindrical magnetic augers disposed in a sump of magnetically attractable toner are used in conjunction with cooperating knife blades to decorate a surface containing a latent magnetic image and to distribute and redistribute toner particles to maintain a level sump.

Abstract: Fingerprint powder and method for developing latent fingerprints therewith, such powder comprised of a powder carrier, especially a mixture of silica and talc, containing a coloring agent, preferably a fluorescent dye. The fingerprint powder can be applied by blowing the powder over a surface containing latent fingerprints, or by brushing or pouring the powder on such surface, or by immersion thereof in such powder, thus developing and revealing a bright, sharp fingerprint, which can be photographed or lifted by applying tape or a strippable coating over the print.

Abstract: Latent fingerprints having a latency of several weeks are applied to paper substrates using compositions comprising trimeric aliphatic acids of at least 30 carbon atoms which are substantive to paper fibers are substantially non-volatile, and are non-hardening, non-toxic and non-hygroscopic. The latent fingerprints are developed as desired by dusting in the conventional manner with toner particles, suitably, comprising magnetic particles in oleophilic matrix.

Abstract: An electro-thermosensitive recording material comprising (1) a support at least the surface of which is electrically conductive, and (2) a conductive recording layer formed on the conductive surface of the support, the recording layer containing (a) a film-forming chlorine-containing polymer and (b) dispersed in the polymer, an acid-sensitive leuco dye and at least one zinc compound selected from the group consisting of zinc oxide optionally doped with a different metal, zinc hydroxide, zinc sulfide, zinc carbonate, zinc acrylate and zinc stearate.

Abstract: A novel metal modified novolak resin is prepared. The metal modified novolak resin is an electron acceptor and is further characterized by its compatability with the surface properties of a paper substrate. The metal modified novolak resin comprises a reaction product of a novolak resin and a metal salt. The novolak resin is a reaction product of a mixture containing a para-substituted phenol selected from the group consisting of paraalkylphenols having alkyl groups of about 1 to about 12 carbon atoms, paraphenylphenol and mixtures thereof, salicylic acid and formaldehyde.The novel metal modified novolak resin is prepared by heating a mixture containing one or more para-substituted phenols, salicylic acid, formaldehyde and an acid catalyst for a period of time sufficient to substantially completely react the phenols, salicylic acid and formaldehyde to form a melted novolak resin. The melted novolak resin is mixed with a zinc salt in a inert atmosphere to form the metal modified novolak resin.

Abstract: A ribbon, adapted for use on an impact printer, is provided wherein the ribbon is impregnated with a first substantially colorless substance which acts as a color-former when reacted with a second substantially colorless substance acting as a color-developer, present on a portion of a substrate. Upon the transfer of the color-former from the ribbon to the substrate by impact, a colored image will form on those areas of the substrate which are coated or impregnated with the color-developer. Images may thus be selectively transferred to an interior ply of a multi-ply business forms assembly by the conventional transfer methods without appearing on the exterior, impact receiving ply of such an assembly.

Abstract: Heat-sensitive recording materials having a recording layer comprising a soluble heat-sensitive organic high molecular weight compound which is folded to show a granular state on a support, and a recording process for obtaining images which comprises imagewise applying heat to the recording layer to insolubilize the high molecular weight compound and removing by dissolving the portion of the recording layer where the high molecular weight compound is not insolubilized.

Abstract: A recording process, wherein an organic reducing compound being present in a supported or self-supporting layer and corresponding to one of the following general formulae (I) and (II): ##STR1## wherein: R.sub.1 represents hydrogen, an aliphatic group of a cycloaliphatic group, andR.sub.2 represents an aliphatic oxy group, a cycloaliphatic oxy group, an aryloxy group, an amino group of the formula ##STR2## in which R.sub.3 and R.sub.4 (same or different) represent hydrogen, an aliphatic, a cycloaliphatic or an aromatic group or R.sub.3 and R.sub.4 represent together the necessary atoms to close a heterocyclic nitrogen containing nucleus; ##STR3## wherein R.sub.5 represents an aliphatic, cycloaliphatic, aromatic or heterocyclic group, is caused to effect in said layer under the influence of information-wise heating an information-wise reduction of a reducible reaction partner.