Abstract: This finger-printing packet consists primarily of an inked sheet, for placement in a suitable jig, to apply ink to a person's finger, so as to obtain excellent finger-prints on a finger-print form. It further includes a foil cover, suitably adhered to the inked surface of the sheet, and a corner tab enables the user to remove the foil cover from the sheet easily.

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: A fingerprint card holding device that simplifies the procedure for taking fingerprint impressions on fingerprint cards. The device includes a platen means upon which the card is placed, a hoop means for holding the card to the platen means, an indexing means for locating the card in the correct positions and an actuating means for moving the card for rolling the prints of the fingers of the right hand, the fingers of the left hand and for making the flat fingerprints of both hands.

Abstract: A document with a color pattern which is resistant to forgery by photo reproducing process, at least a portion of the color pattern comprising, a coloring material having a spectral reflection factor curve which is relatively high at a wavelength in at least one of the areas below 450 nm and about 650 nm, with respect to the rest of the curve. A method is also disclosed for avoiding reproduction of a document having colored areas using photo reproducing processes.

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 technique for making a permanent imprint of trichoglyphs (cowlicks). A liquid solvent is applied to the surface of the trichoglyph. A flexible sheet of solvent-soluble material is pressed over the wetted trichoglyph area. The sheet is marked and indexed with respect to externally recognizable anatomical features of the animal adjacent to the trichoglyph area. This results in the impression of the trichoglyph configuration in geometric relation to indexed markings on the sheet indicative of the position of the trichoglyph on the body of the animal. The sheet is subsequently removed and dried. The resulting impression can be used to produce prints for later comparison purposes and for recording of the trichoglyph features.

Abstract: Latent fingerprints can be detected and visualized by application to the suspected locale, of a solution, in a volatile organic solvent of selected silver salts soluble in said solvent. Suitable salts include silver perchlorate and silver trifluoroacetate. The solution is preferably applied as a spray. This non-aqueous solution minimizes smudging, "running", warping and other damage to water-sensitive material (usually inks, dyes and/or cellulosic substrates).

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: 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: The imaging layer coated side of a heat-responsive recording medium is selectively heat-sinked by the raised portions of live skin tissue contacting the same so that only the unheat-sinked portions of the recording medium will reach an imaging temperature. The source of heat for the film may be a flash lamp directed against the opposite substrate side of the film where the electromagnetic energy thereof is converted into heat when absorbed by the substrate, or may be a source of externally applied heat transmitted through the substrate to the imaging layer of the film. In the latter case, the recording medium is preferably initially in spaced relationship with a heat contact plate which is to be contacted by a heat source, which may be the end face of a piston either pre-heated to a given temperature or having a current heatable resistance thereon to be pulsed with current. In the former case the plunger end face preferably has a low heat conductivity coating thereon.

Abstract: A method of making fish prints by using paper or silk cloth to which special chemicals which show color reaction to the secretion or humor at the surface of a fish body was previously applied, and paper or silk cloth to be used exclusively for such fish prints.

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: Method and apparatus for recording sweat gland activity which provides a pictorial representation thereof by physical contact of an iodide treated skin area with a dry sensitized substrate. In one preferred embodiment, the sensitized substrate comprises a sheet material which has been coated with an aqueous solution containing from 1 to 10 percent by weight of starch and from 2 to 10 percent by weight of a suitable oxidizing agent such as potassium persulfate. Alternately, the dry sensitized substrate comprises a starch-oxidizing agent mixture which has been impregnated into an absorbent base layer. With slight modification of the foregoing embodiment, the present invention also provides a method and apparatus for obtaining inkless fingerprints by forming a sensitized coating in situ on a substrate. For fingerprinting purposes, the sensitized coating is preferably formed from a quick drying starch-oxidizing agent solution including alcohol as a solvent.

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: A method of producing an imprinting device having a supporting member and an impression conforming film thereon comprising depositing a thin, conformable elastomeric coating on a web from a mixture of resinous elastomer, filler and liquid solvent, drying the coating to form a film; applying a coating of wet ink on one surface of the film and bonding the film to the supporting member and the method of producing the thin flat conformable film.

Abstract: An inkless fingerprinting system comprises a porous, non-yielding reagent pad saturated with a substantially colorless metallic salt solution, preferably based on ferric chloride, and means for applying an organic developer, preferably 8-hydroxyquinoline, to a latent fingerprint obtained by pressing the distal surface of a finger against the reagent pad and transferring the reagent adhering to the ridges of the finger onto a paper or plastic surface. The reagent and the developer interact to form a colored chelate and, thereby, render the fingerprint visible.