Abstract: Security paper (1) has a security zone (2) for providing protection against mechanical falsification. The security zone comprises a set of cells (3) indented in the paper and optionally interconnected by indented link portions, the thickness of the paper being substantially uniform throughout its area that is complementary to the cells (3) and to the link portions in the security zone (2).

Abstract: The present disclosure relates to a method for printing a secure image on media using an inkjet printing device. The method includes printing an underlayer using an inkjet printing device that penetrates into a front surface of media. The underlayer is configured to define identification indicia. Included in the method is printing a secure image on top of the underlayer using an inkjet printing device. Examination of a back surface opposite the front surface allows viewing of the identification indicia for authenticating the secure image.

Abstract: A method for marking a watermark-type pattern onto at least part of an absorbent paper sheet is described. The method involves stress-deforming the sheet by making it pass between at least one first roll and at least one second roll. A film of additive is applied in unheated manner to at least one of the sheet surfaces during the marking stage, thereby enhancing watermark formation. Additionally described is an absorbent paper sheet including at least one cellulose web ply which is made by the above method.

Abstract: The present invention provides a method of manufacturing an article (9) comprising a fiber layer (5) and at least one electronic chip (7), the fiber layer being formed by depositing fibers on a surface (3) immersed in a dispersion (4) of fiber material.

Abstract: The invention relates to security paper (1) including at least one zone (2; 3) that reacts with nonpolar solvents. The paper also includes a barrier (4) that is impermeable to nonpolar solvents between a first outside face (10) of the security paper and the zone (2; 3) that reacts with the solvents.

Abstract: A method for manufacturing paper having a variable characteristic in a crossmachine direction including the steps of feeding a slurry to a distributor and delivering the slurry from the distributor to a headbox through a plurality of delivery lines. The delivery lines are coupled to the headhox at a plurality of locations spaced across the headbox in a crossmachine direction. The method includes selectively introducing a property altering agent in at least two of the delivery lines at the distributor to selectively alter the properties of the slurry passing through the at least two delivery lines. The method also includes the step of depositing the slurry received by the headbox on a papermaking wire to form paper.

Abstract: Security paper adapted to resist fraudulent alteration of toner-printed information thereon and to make such alteration or attempts at alteration evident has a maximum Scott-Bond strength of 150 J m−2; a Bendtsen roughness of not more than about 150 ml min−1; and is size press or otherwise treated with a thermally-softenable polymer composition, for example acrylic polymer or copolymer, a polyvinyl acetate polymer, a vinyl acetate/ethylene copolymer, or a vinyl acetate/vinyl chloride/ethylene terpolymer. Preferably the paper has filler content of about 15% to about 20% by weight.

Abstract: A counterfeit-resistant document comprises a contrasting layer and a dynamic camouflaging layer. The contrasting layer is highly contrastive and includes a latent message that can be reproduced over a broad range of copy device control settings. The dynamic camouflaging layer is applied over the contrasting layer to suppress the latent message. The visual density of the dynamic camouflaging layer, which comprises a camouflage pattern that is printed in thermochromic ink, inversely varies with temperature. In this manner, the dynamic camouflaging layer is inactivated at room temperatures so that the latent message is suppressed on the original document, and activated at scanning temperatures so that the latent message is exhibited on a reproduction of the original document.

Abstract: Fluorescent particles strongly fluorescing upon irradiation with ultraviolet rays, as well as a process for producing the same, are provided. A water-insoluble fluorescent dyestuff and/or pigment fluorescing upon irradiation with ultraviolet rays and a powdery material including starch, cellulose, other polysaccharides and sugars are mixed and granulated. The surface of granules of the powdery material may be coated with the fluorescent dyestuff and/or pigment. In granulation or coating, a resin having reactive groups reacting with the hydroxyl groups of the powdery material is used in combination, whereby particles excellent in water resistance can be obtained. Further, the interaction between an anionic binder contained in the granules and a cationic material contained in the coating layer or between a cationic binder contained in the granules and an anionic material contained in the coating layer can be utilized to confer water resistance on the particles.

Abstract: The present invention relates to a method of manufacturing a coated paper having at least one mark resembling a watermark, the method being characterized in that said mark is made after the drying step which follows the last coating operation, by performing steps in which: a) a re-wetting solution is applied to at least one face of the coated paper, in one or more determined zones; and b) pressure and heat are applied in said re-wetted zone(s) of the coated paper so as to evaporate said solution and densify the coated paper in said zone(s) relative to the remainder of the paper. The present invention also provides a coated paper including at least one mark resembling a watermark, characterized in that one or more determined zones of the coated paper present a reduction in thickness relative to the remainder of the coated paper, the density per unit area in said zone(s) of the coated paper being identical to that in the remainder of the paper.

Abstract: The invention relates to a method for producing a security paper or board product carrying micro or nano structures such as diffractive optical elements in which method the diffractive structures are integrated into the security paper or board product at the manufacturing process of said product. The invention also relates to a method for producing a security package carrying diffractive structures in which method the diffractive structures are integrated into the security package at a manufacturing stage of the security package material. The invention further relates to a security package containing authentication information in a form of diffractive structures in which package the diffractive structures are included in the security package at least in one of the following forms: as embossed in the package material, as part of the size or paste or resin used in the manufacturing process of the security package, or as part of the ink used in printing the security package or the security package material.

Abstract: This invention is directed to improvements in paper incorporating an elongate impermeable element, to a method of making such paper and to documents made therefrom.

Abstract: The purpose of the invention is to provide a forgery/alteration protective material which containing a retroreflecting material and having an improved forgery/alteration protecting effect against the process of the upper part of the material.

Abstract: Security fibers having enhanced antifalsification features are prepared by a process which comprises the steps of: i) braiding 5 to 30 denier fibers to form a twine; ii) dyeing the twine with a dye or pigment; iii) drying the dyed twine; and then iv) cutting the dried twine to give the security fibers in the form of cut fibers.

Abstract: The present invention is directed to a method of manufacturing security elements for electronic article surveillance, the security elements being made of at least two layers, and to a security element manufactured according to the method The method comprises the steps of applying a first layer of a cellulose material in a still moist state to a second layer of a cellulose material, with soft magnetic elements which emit a characteristic signal in the interrogating field of an article surveillance system being added to one of the two layers; and subsequently die stamping or cutting out the desired shape of the security elements from the two layers in the dry state. The method provides a low cost manufacturing means for reliably operating security elements.

Abstract: This invention pertains to security paper and methods of making such security paper. The invention comprises a light-colored base paper having a non-protection area of a first thickness, and a protection area of a second thickness on at least one major surface of the base paper wherein the first thickness is greater than the second thickness. The base paper comprises colorant whereby the protection area exhibits a translucence when viewed using transmitted light, and exhibits the colorant as a darker color indication, relative to the non-protection area, when viewed using reflected light. Transmission of light through a combination of paper fibers and the colorant of the invention, both being disposed at the protection area, is discernibly different from transmission of light through the non-protection areas of the base paper, when viewed with a human eye.

Abstract: Security paper (1) has a security zone (2) for providing protection against mechanical falsification. The security zone comprises a set of cells (3) indented in the paper and optionally interconnected by indented link portions, the thickness of the paper being substantially uniform throughout its area that is complementary to the cells (3) and to the link portions in the security zone (2).

Abstract: This invention pertains to security paper and methods of making such security paper. The invention comprises a light-colored base paper having a non-protection area of a first thickness, and a protection area of a second thickness on at least one major surface of the base paper wherein the first thickness is greater than the second thickness. The base paper comprises colorant whereby the protection area exhibits a translucence when viewed using transmitted light, and exhibits the colorant as a darker color indication, relative to the non-protection area, when viewed using reflected light. Transmission of light through a combination of paper fibers and the colorant of the invention, both being disposed at the protection area, is discernibly different from transmission of light through the non-protection areas of the base paper, when viewed with a human eye.

Abstract: This invention pertains to security paper and methods of making such security paper. The invention comprises a light-colored base paper having a non-protection area of a first thickness, and a protection area of a second thickness on at least one major surface of the base paper wherein the first thickness is greater than the second thickness. The base paper comprises colorant whereby the protection area exhibits a translucence when viewed using transmitted light, and exhibits the colorant as a darker color indication, relative to the non-protection area, when viewed using reflected light. Transmission of light through a combination of paper fibers and the colorant of the invention, both being disposed at the protection area, is discernibly different from transmission of light through the non-protection areas of the base paper, when viewed with a human eye.

Abstract: A method and apparatus for incorporating feature substances into a still moist but already sufficiently consolidated paper web provides for directing a feature substance suspension onto the surface of the paper web as a laminar jet with low jet pressure. A special pressure control circuit ensures that the jet pressure is always constant regardless of the number of parallel feature substance suspension jets directed onto the paper web. This makes it possible to incorporate a great variety of line codings in paper under the same process conditions without any visible changes in fiber structure occurring in the paper.

Abstract: Speckle-patterned paper is produced on the paper machine without the use of printing techniques by first preparing speckle-forming material and then introducing this into a contrasting color papermaking furnish. Paper is then made from the speckle-containing furnish in the normal way. The speckle-forming material is produced either by agglomerating a mixture of papermaking fibre, particulate pigment and, preferably, a latex or other binder or by dry comminution of cellulose fibre aggregates in the form of paper or entangled fibre clumps.

Abstract: A novel substrate for the manufacture of security documents, said substrate comprising conductive polymer particles.

Abstract: This invention pertains to security paper and methods of making such security paper. The invention comprises a light-colored base paper having a non-protection area of a first thickness, and a protection area of a second thickness on at least one major surface of the base paper wherein the first thickness is greater than the second thickness. The base paper comprises colorant whereby the protection area exhibits a translucence when viewed using transmitted light, and exhibits the colorant as a darker color indication, relative to the non-protection area, when viewed using reflected light. Transmission of light through a combination of paper fibers and the colorant of the invention, both being disposed at the protection area, is discernibly different from transmission of light through the non-protection areas of the base paper, when viewed with a human eye.

Abstract: A method for making a paper sheet comprising at least one region which is thinner than the rest of the sheet. According to the method, a first paper layer (3) is formed on a wire in a first wet end of a paper-making machine, a second paper layer (5) is formed on a wire in a second wet end of the paper-making machine, one of the two paper layers has a number of localized tinner regions (8) so that the thickness (e2) of said paper layers in said regions is up to 50% less than the thickness (et) of the rest of the sheet, and the two layers are joined together and dried. The resulting paper may be used in banknotes or checks.

Abstract: A security feature (1) that is used with a substrate (2). The security feature includes a plurality of fluorescent micro-particles (1A) that form a background component of the security feature and a plurality of fluorescent discrete particles (1B) that form a foreground component of the security feature. The discrete particles are larger in size than the micro-particles and are optically distinguishable from the micro-particles under at least one illumination condition. In the preferred embodiment the security feature is applied as a coating to the substrate, and the security feature further includes a coating binder (1C) in which the micro-particles and the discrete particles are contained. The coating binder can be made of, for example, at least one of an ink base, an adhesive, an epoxy, a varnish, a polymer solution, or a dry material having binding properties. The coating binder may be substantially transparent or substantially opaque.

Abstract: A counterfeit-resistant document comprises a contrasting layer and a dynamic camouflaging layer. The contrasting layer is highly contrastive and includes a latent message that can be reproduced over a broad range of copy device control settings. The dynamic camouflaging layer is applied over the contrasting layer to suppress the latent message. The visual density of the dynamic camouflaging layer, which comprises a camouflage pattern that is printed in thermochromic ink, inversely varies with temperature. In this manner, the dynamic camouflaging layer is inactivated at room temperatures so that the latent message is suppressed on the original document, and activated at scanning temperatures so that the latent message is exhibited on a reproduction of the original document.

Abstract: This invention pertains to security paper and methods of making such security paper. The invention comprises a light-colored base paper having a non-protection area of a first thickness, and a protection area of a second thickness on at least one major surface of the base paper wherein the first thickness is greater than the second thickness. The base paper comprises colorant whereby the protection area exhibits a translucence when viewed using transmitted light, and exhibits the colorant as a darker color indication, relative to the non-protection area, when viewed using reflected light. Transmission of light through a combination of paper fibers and the colorant of the invention, both being disposed at the protection area, is discernibly different from transmission of light through the non-protection areas of the base paper, when viewed with a human eye.

Abstract: A method of manufacturing a thread-inserted window paper produces paper in which a thread is exposed to windows which are intermittently formed, and have clear contours, and in which thread is exposed surely at the window portions to make the thread clearly recognizable visually. The method is capable of being carried out with a relatively simple apparatus. Wet paper (1) in which a thread (T) is embedded in the paper layer is guided while being in intimate contact with a center roll (3) having protrusions (2) arranged on the surface thereof intermittently at a predetermined distance, the surface of the wet paper on the protrusions is frictionally rubbed by a friction roll (4) thereby moving fibers at the surface of the wet paper on the protrusions to form exposed portions of the thread intermittently on the surface of the wet paper and the wet paper is then dried by a customary method.

Abstract: A method for manufacturing paper having colored stripes, the method comprising the steps of feeding a slurry to a distributor and delivering the slurry from the distributor to a headbox through a plurality of delivery lines. The delivery lines are coupled to the headbox at a plurality of locations spaced across the headbox in a crossmachine direction. The method further comprises the steps of selectively introducing a first coloring agent in at least two of the delivery lines to selectively color the slurry passing through the at least two delivery lines and depositing the slurry received by the headbox on a papermaking wire to form striped paper.

Abstract: A security paper indicates exposure to a solvent by a solvent resistant color signal. A metal mordant dye first co-reactant and a mordant dye second co-reactant form an organic solvent-insoluble colored reaction product when the paper is washed with an organic solvent. The metal mordant dye first co-reactant and a mordant dye second co-reactant are chemically isolated from each other so as to prevent the coordinate covalent bond from forming until the paper is washed with an organic solvent. The chemical isolation can be effected by encapsulation or other physical separation of the co-reactants. The organic solvent-insoluble colored reaction product, once formed, remains entrapped in the web when the paper is washed with an organic solvent. The chemical isolation prevents the organic solvent-insoluble colored reaction product from forming upon the application of pressure alone to the paper.

Abstract: The invention relates to security paper and in particular to a method for the manufacture of security paper that is provided with high-quality watermarks. In particular such a method comprises forming a papermaking suspension comprising cellulosic fibers and polyvinyl alcohol fibers, which polyvinyl alcohol fibers are soluble in water at temperatures of from 95 to 100 degrees C, dewatering the papermaking suspension through an emboseed wire mesh or other embossed means, wherein the embossing creates a profile of peaks and troughs corresponding to the light and dark areas of the watermark, and the formed paper after dewatering with the watermark feature is thereafter dried to provide the resulting security paper.

Abstract: An authenticatable paper product is prepared by adding to a papermaking furnish fibers treated with from about 50-200 lb/ton of a fluorescent whitening agent (FWA). The paper made from the papermaking furnish will include fluorescent cellulosic fibers in an amount ranging from between 0.1-4.0 lb/ton to achieve FWA concentrations within the range of 1-20 ppm.

Abstract: This invention relates to a method for producing anti-counterfeit paper. Such processes of this type, generally, add a certain percentage of wood fiber lumens which have been loaded with one or more fluorescent agents. These wood fiber lumens would look normal under regular light, but will glow when exposed to various manners of radiation.

Abstract: An authenticable paper product is prepared from a bleached chemical papermaking furnish containing a minor but detectable amount of lignin containing fibers selected from the group consisting of mechanical, thermomechanical, chemi-thermomechanical and bleached-chemi-thermomechanical.

Abstract: The invention relates to a method of producing visible, preferably transparent or translucent, continuous streaks and/or delimited fields in paper in conjunction with forming a paper web in a paper machine. The method is characterized by essentially preventing dewatering of paper stock/paper fibres on one or more surfaces of a wire in the forming unit of a paper machine in conjunction with forming a paper web in the machine, and by applying a special stock that contains fibres which differ from the other fibre material deposited on the wire, optionally together with an arbitrary filler and/or binder. The invention also relates to a valuable document, such as a banknote, produced from the aforedescribed paper.

Abstract: Anti-falsification paper is provided in which a thread is exposed at window portions provided on the surface of the paper, and which does not produce any cockles even when wound up continuously in a roll and has good appearance in terms of design. This anti-falsification prevention paper is combination paper having at least two paper layers including an outermost layer and an inner layer. Window portions are formed in the outermost layer at intervals in a longitudinal direction of the paper. In the window portions there are formed watermarks of letters or pictures, and a thread inserted between the outermost layer and the other layer is exposed at these window portions. The ratio between the length (X) of the window portions in the longitudinal direction of the paper and the length (Y) in the same direction of non-window portions between the window portions is set at 3:1 to 1:2 to securely prevent the formation of cockles during the winding of paper.

Abstract: The invention relates to improvements in security features in paper and in particular to a method of making paper and transparentising selected areas of paper to provide enhanced security features. The invention thus provides a method of making paper comprising the step of depositing fibers (12) onto a support surface (13) to form a porous absorbent sheet (14), applying a transparentising resin to at least portion of said porous sheet and subsequently impregnating the porous sheet with a sizing resin.

Abstract: In a method for providing papers of value with authenticity features, a homogeneous mixture is produced in a defined concentration from a feature substance present in powder form and a gas. This mixture is ejected at high speed from at least one nozzle disposed at a given distance from the paper web and transferred onto the running paper web.

Abstract: A saturated paper suitable for use in a clean room environment, which paper includes a fibrous web in which at least about 50 percent of the fibers comprising the web, on a dry weight basis, are cellulosic fibers. The paper also includes a saturant which is present in the saturated paper at a level of from about 10 to about 100 percent, based on the dry weight of the fibrous web. The saturant, in turn, includes from about 98 to about 70 percent, on a dry weight basis, of a latex reinforcing polymer having a glass transition temperature of from about -40.degree. C. to about 25.degree. C.; and from about 2 to about 30 percent, on a dry weight basis, of a cationic polymer. The saturant is adapted to render the saturated paper durable, low linting, and ink jet printable.

Abstract: Security paper carries an intricate tactile surface profile pattern which has been imparted to the paper during its manufacture, at a stage after initial de-watering but before final drying, by passing the paper through a nip between a forming surface corresponding to the desired pattern and a backing surface. The tactile pattern is of excellent durability, and its intricacy offers a high degree of security. The tactile pattern is visible when viewed under low angle light, which facilitates verification or authentication of security documents made using the patterned paper.

Abstract: The present invention relates to a method for producing security paper which includes a security feature. The method comprises forming paper in a wet state, which paper incorporates on or more security features, applying to the paper a sizing agent, thereafter applying to one or both sides of the sized paper a coating comprising an unpigmented polyurethane. The unpigmented polyurethane may optionally comprise a functional additive provided that the presence of the functional additive does not increase the opacity of the paper by more than 1%. After the polyurethane has been applied the paper is dried. The coating composition provides a film, when cast on a glass surface, having a Konig hardness of from 15 to 130 seconds.

Abstract: A method and apparatus for making a data carrier (1) such as a paper of value or the like having an optically variable element (5,6) such as a hologram, applied to the surface, and an additional printed pattern (2), applied for example by steel intaglio printing, wherein the surface of the data carrier (15,16,20,21) is made smoother in the area of the optically variable element than in the remaining surface and the optically variable element is applied to the smoother area.

Abstract: The invention is concerned with the production of filaments or fibers each of which carries a recognizable "signature" (encoding). These filaments or fibers are produced by taking a film (preferably a plastics film) applying a code directly onto the film across the effective width of the film and then dividing the film substantially at right angles to the code into longitudinal filaments, so that the encoding is then present in each of the filament in exactly the same "signature" as in the code applied to the film.

Abstract: Articles for use with security documents are disclosed which include planchettes and security threads that comprise a plastic substrate having at least one security feature employing soft magnetic metal located thereon. Preferred articles comprise at least two security features where a first security feature is made up of an optionally repeating pattern of soft magnetic metal adapted to generate a signal or a series of signals in an interrogation field applied by a detection system for remote detecting and optionally for remote reading or identifying the article. A second security feature is a public security feature that comprises magnetic and/or non-magnetic metal formed indicia. The first and second security features of this invention can be coextensive features.

Abstract: Interference pigments based on titanium dioxide-coated silicatic platelets which have been heated in a reducing atmosphere are useful for producing forgeryproof documents and packaging.

Abstract: A printable sheet having a high printing quality and a high handling resistance. At least one of the sides of the sheet is treated with a composition which comprises at least one filler and at least one elastomeric binder. The elastomeric binder is selected from the group consisting of aqueous dispersions of polyurethane, acrylate copolymers, optionally carboxylated styrene-butadiene copolymers, and polymers of which one of the monomers is acrylonitrile, isoprene, or neoprene, or mixtures thereof. The sheet can be used for manufacturing protected documents.

Abstract: The invention relates to an antifalsification paper having a security element in the form of a thread or band which consists of a transparent plastic film with an at least partly opaque coating. The security element has at least a first opaque coating and a transparent area bordering on this opaque coating, and information extending from the first opaque coating into the transparent area.

Abstract: The present invention relates to a paper of value having an embedded security element, preferably an optically variable element in the form of hologram, diffraction or interference structures applied to the paper surface, and to a method for producing such a paper of value. The paper of value is characterized by the fact that the optically variable element is embedded in the paper of value with the paper surface forming a plane that is even with the surface of the optically variable element.

Abstract: A security element for use in a security document such as a bank note, identity card or the like includes at least a partial metallic coating on a substrate and wherein the metallic coating includes recesses in the forms of characters or patterns that are visually recognizable at least in transmitted light and a magnetic coating of soft-magnetic pigments disposed in overlying relationship with the metallic coating. A security document containing the security element is also described.

Abstract: A security paper is provided for incorporation in a security document, or other document having intrinsic value. The security paper includes a resinous substrate sheet on which indicia are printed. Paper sheets are laminated on either side of the resinous substrate sheet using a suitable adhesive. In the laminated security paper, the indicia printed on the substrate sheet are undetectable when viewed in reflected light, but become apparent when viewed transmitted light within the visible spectrum. The security paper may be incorporated in a security document in which a set of indicia printed on at least one of the outer faces of the paper sheets, such that the indicia on the substrate and the indicia on the document form a total image when viewed in transmitted light. A method for manufacturing the security paper is also provided.