EP1673735A1 - Document de valeur - Google Patents

Document de valeur

Info

Publication number
EP1673735A1
EP1673735A1 EP04765833A EP04765833A EP1673735A1 EP 1673735 A1 EP1673735 A1 EP 1673735A1 EP 04765833 A EP04765833 A EP 04765833A EP 04765833 A EP04765833 A EP 04765833A EP 1673735 A1 EP1673735 A1 EP 1673735A1
Authority
EP
European Patent Office
Prior art keywords
value
document
feature substance
substance
feature
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP04765833A
Other languages
German (de)
English (en)
Inventor
Gerhard Schwenk
Thomas Giering
Gerhard Stenzel
Kaule Wittich
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Giesecke and Devrient GmbH
Original Assignee
Giesecke and Devrient GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Giesecke and Devrient GmbH filed Critical Giesecke and Devrient GmbH
Publication of EP1673735A1 publication Critical patent/EP1673735A1/fr
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
    • G07D7/06—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using wave or particle radiation
    • G07D7/12—Visible light, infrared or ultraviolet radiation
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
    • G07D7/004—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using digital security elements, e.g. information coded on a magnetic thread or strip
    • G07D7/0043—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using digital security elements, e.g. information coded on a magnetic thread or strip using barcodes

Definitions

  • the invention relates to a value document, in particular a banknote, with a value document substrate and at least three different feature substances for checking the value document.
  • a document of value is known from the publication WO 97/39428, the substrate of which in one area has various machine-authenticated authenticity features for different security levels.
  • the value document contains a machine-authenticated low security feature that is formed from a single material. When queried, the low security feature provides a yes / no response indicating the presence or absence of the queried property.
  • the low security feature is used for authenticity checking in applications in which a simple detector is used, for example in retail outlets.
  • Another high-security feature which can also be machine-authenticated, has properties that are difficult to prove and enables a more in-depth query of the value document and authentication at a much higher level.
  • Checking the high security feature is complex and takes place, for example, in central banks.
  • This high security feature is a homogeneous mixture of two substances with different physical properties, such as the excitation wavelength for luminescence emission or coercivity etc.
  • the object of the invention is to propose a generic document of value which, in addition to increased security against forgery, also includes a possibility of recognizing the value.
  • value recognition is understood to mean the evaluation of coded information for a specific group of users.
  • the coded information can represent, for example, the denomination, the currency, the series, the country of issue or other features of the banknote.
  • the document of value according to the invention has a first feature substance as well as a second and third feature substance, the second and third feature substance being applied to the value document substrate together in one printing ink.
  • the second feature substance is formed by a luminescent substance and the third feature substance by a material that absorbs in a special spectral range.
  • this combination creates a complex feature system that is very difficult for a counterfeiter to reproduce.
  • the feature system allows users from different user groups to to carry out both an authenticity check and a value recognition on the document.
  • users of a user group can use a characteristic property of the first feature substance for the authenticity check, while users of another user group use a characteristic property, in particular the luminescence of the second feature substance, for the authenticity check.
  • Both user groups can use the absorbent material for value recognition in order to carry out a value recognition in addition to the authenticity check without much additional effort; to be able to make. The exact execution of the authenticity check and the value recognition is described in detail below.
  • These user groups can be central banks, commercial banks, any trading companies, such as local transport companies, department stores or vending machine operators, etc.
  • the first feature substance is introduced in the region of the value document substrate near the surface.
  • the distribution of the first feature substance can be ordered and form a predetermined structure. For example, a streak coding of the feature substance, as described in detail below.
  • the processes described in the publications EP-A-0 659 935 and DE 101 20 818 are suitable, in which the particles of the first marking substance are mixed with a gas stream or a liquid stream and into one wet paper web. To this extent, the disclosures of the cited documents are included in the present application.
  • the first feature substance is distributed substantially uniformly in the volume of the value document substrate, so that sufficiently large volume elements of the same size each contain essentially the same amount of the first feature substance.
  • the distribution can be regular and can take place, for example, in a predetermined regular pattern.
  • the first feature substance is preferably introduced into the substrate volume with a random distribution. If paper is used as the substrate of value documents, the feature substance is preferably added to the paper pulp before the sheet is formed.
  • a feature substance that absorbs in the infrared spectral range is preferably selected as the third feature substance.
  • “infrared spectral range” is understood to mean the wavelength range from 750 nm and larger, preferably 800 nm and larger.
  • the third feature substance in the visible spectral range is preferably essentially colorless or has only a weak intrinsic color. The third feature substance is then under normal lighting conditions not recognizable or appears to be only slightly conspicuous.
  • the infrared-absorbing feature substance does not provide an active signal that would facilitate analysis of the substance used.
  • the third feature substance does not yet have any significant absorption even at a wavelength of approximately 800 nm, so that it cannot be detected even with commercially available infrared detectors based on silicon.
  • the third feature substance preferably exhibits significant absorption only in the spectral range above approximately 1.2 ⁇ m, preferably in the spectral range between approximately 1.5 ⁇ m and approximately 2.2 ⁇ m. In this case, the infrared absorption of the third feature substance can only be detected with complex and little-used detectors.
  • a substance based on doped semiconductor material is used, for example, as the infrared-absorbing feature substance.
  • Substances that contain a metal oxide are also suitable and are characterized in particular by their resistance to aging.
  • the third feature substance is preferably in particle form with an average particle size of less than 50 nm.
  • the infrared absorbers which can be used in the invention and which have no appreciable absorption in the visible or at about 800 nm, approximately 2.5 ⁇ cyclo-hexadiene-1,4-diylidenes-bis [N, N-bis ( 4 ⁇ dibutylaminophenyl) ammonium] bis (hexafluoroantimonate) with the formula C62H 2 N6F ⁇ 2 Sb 2 , the dyes ADS 990 MC with the formula C32H3oN 2 S 4 Ni, or ADS 1120P with the formula C52H44CI2O6 from the company Siber Hegner GmbH, called Hamburg become.
  • the document of value has a fourth feature substance, which, like the first feature substance, is preferably incorporated into the substrate of the value document.
  • the fourth feature substance can be used in addition or as an alternative to the first feature substance to check the authenticity of the value document.
  • the distribution of the fourth feature substance in the substrate can form a predetermined structure, or can be uniform and in particular have a random distribution.
  • the series or the respective up-grade e.g. a banknote issue.
  • the first feature substance is present in a currency that was originally issued and the first and fourth feature substance in the currency up grade. After a certain transition period, it is conceivable to use only the fourth feature substance.
  • the first feature substance and / or the fourth feature substance can also advantageously be formed by a luminescent substance or a mixture of luminescent substances.
  • Luminescent substances or mixtures which emit in the infrared spectral range and which in particular have a complex, difficult-to-adjust spectral emission characteristic are preferably used for these feature substances.
  • This emission characteristic can be used in particular to distinguish the luminescent substances from similar luminescent substances. However, it can also be used to generate a coding by the shape of the emission and / or excitation spectra of the luminescent substances.
  • the third feature substance is an infrared-absorbing feature substance and the first and / or fourth feature substance is one Luminescent substance formed, which emits in the absorption region of the third feature substance. This allows the interaction of the properties of the luminescent substance and the third feature substance to be used for reading out the coding, as described in detail below.
  • At least one of the luminescent feature substances is preferably a luminescent substance based on a host lattice doped with rare earth elements. Several or all of the luminescent substances can also be formed on the basis of such a doped host lattice. These luminescent substances can e.g. be excited by direct radiation into the absorption bands of the rare earth ions. In preferred variants, absorbing host lattices or so-called “sensitizers” can also be used, which absorb the excitation radiation and transmit it to the rare earth, which then emits the luminescence. It goes without saying that the host lattices> and / or the dopants differ for the different feature substances can be to get different excitation and / or emission ranges.
  • the iris grating absorbs up to about 1.1 ⁇ m in the visible spectral range and optionally, in particular in the case of the first or fourth feature substance, in the near infrared range.
  • the excitation can then take place via light sources, such as halogen lamps, LEDs, lasers, flash lamps or xenon arc lamps, with high effectiveness, so that only small amounts of the luminescent substance are required. This makes it possible, for example, to apply the luminescent substance using customary printing processes. The small amount of substance also makes it difficult for potential counterfeiters to prove the substance used. If the host lattice absorbs up to about 1.1 ⁇ m in the near infrared, we can easily detectable emission lines of the rare earth ions are suppressed, so that only the more difficult to detect emission remains at longer wavelengths.
  • luminescent substances are used which absorb even in the visible spectral range, preferably over the largest part of the visible spectral range, particularly preferably into the near infrared range. Even then, emissions in these more accessible spectral ranges are suppressed.
  • the host lattice can have, for example, a perovskite structure or a garnet structure and can be doped with a rare earth element emitting in the infrared spectral range, such as praseodymium, neodymium, dysprosium, holmium, erbium, thulium or ytterbium. Further possible configurations of the host lattice and the dopant are in the
  • EP-B-0 052 624 or EP-B-0 053 124 listed the disclosures of which are included in the present application.
  • the first and / or fourth feature substance is printed on the value document substrate.
  • gravure printing, screen printing, letterpress printing, flexographic printing or offset printing can be considered as printing processes.
  • the printing inks can contain color pigments, which particularly preferably have transparent areas in the absorption and emission area of the feature substances.
  • a certain absorption by the printing ink is also tolerable, as long as the signals of the feature substances are not completely damped thereby.
  • the absorption by the printing ink is preferably below 50%.
  • the first and / or fourth feature substance are applied or introduced in the form of a coding on the value document substrate in order to further increase the security against forgery of the value document.
  • the second and third feature substances are also advantageously printed in the form of a coding on the value document substrate.
  • the printing inks used here can also contain further color pigments which, as already explained, particularly preferably have transparent areas in the absorption and emission area of the feature substances.
  • the coded application of the third feature substance enables simple and reliable value recognition on the document.
  • the codes formed by the first feature substance, the fourth feature substance or the second and third feature substance can represent any type of characters or patterns, such as an alphanumeric character string.
  • At least one of the codes preferably represents a barcode.
  • the barcode is understood to be any one- or two-dimensional pattern that consists of strips or areas with the feature substances (“bars”) and strips or areas between the bars without feature substances (“gaps ”) consists.
  • the bar / gap sequence represents a binary sequence of numbers that represents any information, including encrypted information, about the value document.
  • the barcode can be invisible to the naked eye in particular and can only be detected in a special spectral range by its emission or absorption after irradiation with a suitable light source. Barcodes are particularly suitable for machine reading and. deliver an almost error-free reading result, especially in connection with check digits. As barcodes For example, common formats such as code 2/5, code 2/5 interleaved, code 128 or code 39, but also special formats used only for the value documents according to the invention are possible. Two-dimensional barcodes, which offer a particularly strongly condensed recording and increased redundancy, which makes them less sensitive to production tolerances, can also be used.
  • the first marking substance with a stripe structure in the form of a bar code can be introduced into the substrate, the second and third feature substances can be printed in the form of a further bar code, while the fourth characteristic substance is printed in the form of an alphanumeric character string.
  • At least one of the codings extends over a predominant part of a surface of the value document, in particular over the substantially entire surface of the value document.
  • a coding or a part thereof can be provided with a certain offset from document to document.
  • the documents are produced in endless format, this can be achieved, for example, by using a printing roller, the scope of which is a non-integer multiple of the document size.
  • a series of successive documents can then encode the same content or of the same form, the individual documents being distinguishable from one another due to the different offset.
  • the same result can be achieved in sheetfed printing if several printing plates with mutually offset codes or coding parts are used in accordance with the desired repetition rate.
  • the value document substrate is preferably a printed or unprinted cotton fiber paper, cotton / synthetic fiber paper, a cellulose-containing paper, or a coated, printed or unprinted plastic film.
  • a laminated substrate can also be used.
  • the material of the substrate is not essential for the invention if it only allows the introduction or application of the required feature substances.
  • the documents of value according to the invention are preferably banknotes, shares, credit cards, identity or identity cards, passports of any kind, visas, vouchers etc.
  • the second and third feature substances are applied to the document substrate using a printing method, for example gravure printing, screen printing, letterpress printing, flexographic printing, ink jet, digital, transfer or offset printing methods can be used for this purpose.
  • a printing method for example gravure printing, screen printing, letterpress printing, flexographic printing, ink jet, digital, transfer or offset printing methods can be used for this purpose.
  • the document of value has a further printing layer which partially or completely covers the areas of the document of value provided with the second and third feature substance.
  • the printing layer can be opaque in the visible spectral range and transparent or translucent in the emission range of the second feature substance and / or in the absorption range of the third feature substance. be cent.
  • the print layer then hides the presence of the second and third feature substance in the visible spectral range, but allows the detection of the luminescence of the second feature substance or the absorption of the third feature substance at the corresponding wavelengths. If the printing layer completely covers the areas of the value document provided with the second and third feature substance, then it must be transparent or translucent both in the emission area of the second feature substance and in the absorption area of the third feature substance in order to allow the respective feature properties to be recorded.
  • the authenticity of the value document is checked and the document is recognized for value by at least one characteristic property of the first and / or second feature substance for checking the authenticity of the value document and the absorption of the third feature substance for value recognition of the value document is used.
  • the authenticity of the value document is preferably determined by users of different user groups on the basis of different feature substances. This means that if the user belongs to a first user group, the authenticity of the value document is determined on the basis of the first feature substance. If the user belongs to a second user group, the characteristic property of the second feature substance is available for authenticity detection. Both user groups carry out the value recognition on the basis of the absorption properties of the third feature substance.
  • the checking or processing by a user of the first user group can be carried out by using at least one characteristic property of the first and / or fourth feature substance to check the authenticity of the value document. For example, some of the users from the first user group can use the first feature substance for the authenticity check, while another part can use the fourth feature substance.
  • the value recognition is preferably carried out by irradiating at least a partial area of the value document with radiation from the absorption area of the third feature substance, determining the absorption of the third feature substance in the partial area at a wavelength from the irradiation area, and determining the value on the basis the specific absorption is performed.
  • the irradiation is advantageously carried out in the infrared spectral range and the absorption is expediently determined by a spatially resolved measurement of the transmitted and / or remitted infrared radiation.
  • the value can also be recognized by at least a partial area of the value document with radiation from the excitation area of the luminescent first and / or fourth feature substance is irradiated, the emission of the first and / or fourth feature substance is determined at a wavelength from the absorption range of the third feature substance, and the value recognition is carried out on the basis of the specific emission.
  • the third feature substance does not absorb at a certain emission wavelength of the first feature substance, while it absorbs at least part of the emission radiation at a certain emission wavelength of the fourth feature substance.
  • the emission of the first feature substance at a certain wavelength is therefore the expected 100%, while the emission of the fourth feature substance is at another certain wavelength, for example 50% based on the expected 100%.
  • a certain absorber can be easily detected. In counterfeiting it is therefore not sufficient to use any absorbent substance, but the absorber must also have a very specific spectrum which interacts with the spectrum of the first and / or fourth feature substance.
  • This alternative variant is based on an interaction between the. Properties of the first or fourth and the third feature substance.
  • the absorption of the third feature substance is not determined by a remission or transmission measurement, as in the previously described method, but by the suppressed luminescence emission of the first or fourth feature substance in the areas provided with the third feature substance.
  • the radiation is preferably carried out in the infrared spectral range, for example at 0.8 ⁇ m to 1.0 ⁇ m, and the emission is measured in a spatially resolved manner to demonstrate the local absorption.
  • the described method additionally allows the measured emission curve to be standardized. Is the absorbing coding print on the front of the value document, besides the front-side luminescence emission modulated by absorption, the back-side luminescence emission is also measured.
  • the value document is irradiated with excitation light from the rear and the essentially constant rear-side emission of the first and / or fourth marking substance is recorded as a reference value.
  • the front-side emission can then be related to this reference value and thereby normalized.
  • the irradiation is advantageously carried out using a light-emitting diode or laser diode.
  • an infrared-absorbing third feature substance has, for example, several advantages over codings which are formed by substances which are luminescent in the visible spectral range.
  • the automatic readability of the IR coding is only slightly disturbed by an underlying background print. Soiling in the infrared spectral range is much less disturbing than in the visible and in the ultraviolet spectral range.
  • the signal / noise ratio of a measuring head is also significantly better with reflectance measurements than with fluorescence measurements, so that a higher resolution can be achieved.
  • the advantage of the described methods is that, in addition to the authenticity check, both user groups can carry out a value recognition on the document without great additional effort.
  • Another advantage is that the users of the first and second user groups use different feature substances for the authenticity check. Therefore For example, an analysis of a device for verifying the authenticity of the second user group does not reveal any reference to the procedure for verifying the authenticity of the first user group, since this detection device does not query any of the properties of the second feature substance.
  • FIG. 1 shows a schematic illustration of a banknote according to an exemplary embodiment of the invention
  • FIG. 2 shows a section through the banknote of FIG. 1 along the line II-II,
  • FIG. 3 shows a section of a banknote according to another exemplary embodiment of the invention
  • FIG. 5 shows a section of a banknote according to a further exemplary embodiment of the invention, and 6 is a rear view of the banknote of FIG. 5.
  • FIGS. 1 and 2 show a schematic illustration of a bank note 10 which is equipped with four different feature substances and which allows the authenticity to be checked and the value to be recognized by different user groups.
  • 1 shows the bank note 10 in a top view and
  • FIG. 2 shows a cross section along the line II-II of FIG. 1.
  • two of the feature substances namely the first feature substance 14 and the fourth feature substance 20, are evenly distributed in the form of particles in the volume of the paper substrate 12 of the bank note 10.
  • the particles of the first and fourth feature substance 14, 20 can be added to the paper or fiber mass before the sheet formation or can be introduced into the fiber matrix only after the layer formation.
  • the first feature substance 14 is formed by a luminescent substance based on a host lattice doped with rare earth metal, which emits after excitation in the infrared spectral range at wavelengths around 1.5 ⁇ m.
  • the fourth feature substance 20 is formed by a mixture of different luminescent substances which emits radiation with a complex and difficult to reproduce spectral distribution after excitation.
  • a second feature substance 16 and a third feature substance 18 are printed together in a printing ink 22 on the front of the bank note 10 and form two different codes 24 and 26.
  • the first code 24 is formed by a bar code in which the denomination of the bank note 10 is filed.
  • the second coding 26 is an alphanumeric coding and contains, for example, the denomination the banknote 10 in plain text and possibly further encrypted information about the banknote.
  • the second feature substance 16 is formed, for example, by a luminescent substance, which can be specifically selected so that its luminescence can be easily excited and detected using commercially available detectors.
  • the third feature substance 18 is formed by an infrared-absorbing material and is essentially colorless in the visible spectral range.
  • the authenticity check and the value recognition can now be carried out by two different user groups using different combinations of the four feature substances 14, 16, 18 and 20 or the codes formed by them.
  • the banknote 10 of the exemplary embodiment is designed for a first user group with high security requirements and a second user group with comparatively low security requirements.
  • the second user group can be, for example, simple machines accepting banknotes in parking lots or vending machines. Inexpensive detection devices for authenticity testing and value recognition are particularly useful for this application.
  • a user of the second user group checks the authenticity of a bank note 10 by irradiating the bank note with light from the excitation area of the second feature substance 16 and detecting a corresponding luminescence signal. If a correct luminescence signal is received, the banknote is rated as genuine by the user. The presence of the correct luminescence signal is sufficient, a spatially resolved evaluation is not necessary. Due to the choice of the luminescent substance 16 can this detection is therefore very simple and is carried out with commercially available, inexpensive detectors.
  • a user of the second user group can, if necessary, carry out a value recognition using the coding 24 formed by the infrared-absorbing third feature substance 18.
  • the bank note in the area of the coding 24 is irradiated with infrared radiation and the transmitted or remitted radiation is measured in a spatially resolved manner, for example along the line II-II in FIG. 1.
  • the infrared absorption of the third feature substance 18 leads, in accordance with the shape of the barcode coding 24, to a modulation of the measured signal, from which the value of the banknote can be easily determined if the coding scheme is known.
  • the first user group with their higher security requirements can. include banks, for example, in which the authenticity of the banknotes is checked using high-quality and complex detectors.
  • the first feature substance 14, with its difficult to detect infrared emission at 1.5 ⁇ m, serves this user group as an authenticity indicator.
  • the fourth feature substance 20 with its complex spectral emission can be used for the authenticity check.
  • the value recognition of the banknote is also carried out by a user of the first user group using the infrared-absorbing third feature substance 18, but unlike the second user group using the more difficult to read alphanumeric coding 26.
  • reading out the alphanumeric is sufficient Coding 26 is not a simple line scan. Rather, the Infrared absorption of the coding 26 is measured in a two-dimensionally spatially resolved manner and the measured signal is subjected to a pattern recognition.
  • the coded information can be in plain text or can be encrypted using a suitable encryption algorithm.
  • the coding 26 can contain the same information as the coding 24, but it can also have different or additional information for the first user group. If the coding 26 contains other information, the users of the first user group can additionally read out the coding 24.
  • the complex evaluation of the coding 26 also carries out an additional authenticity check of the bank note 10 for the first user group. If an invalid coding is recognized during the value recognition by the coding 26, the banknote can be classified as not authentic, even if the checking of the first feature substance 14 did not produce any abnormalities.
  • the second coding 26 may also be missing.
  • the first and second user groups then use the code 24, which is comparatively easy to read, for value recognition.
  • the high-quality authenticity check via the first or fourth feature substance 14 or 20 of the first user group also guarantees the correctness of the value of the banknote read using infrared absorption.
  • Fig. 3 shows a further embodiment of the invention.
  • the paper substrate 12 has two separately produced, connected paper layers 30 and 32.
  • the first feature substance 14 was introduced into the paper layer 30 during paper production, the second feature substance 20 into the paper layer 32.
  • one of the Paper layers, for example layer 30, contain both feature substances, while the other paper layer is not provided with a feature substance.
  • the alphanumeric coding 26 is additionally overprinted with a printing layer 34, which is opaque in the visible spectral range, but is transparent or translucent in the absorption range of the third feature substance 18.
  • the print layer then hides the presence of the third feature substance 18 in the visible spectral range, but allows the detection of its infrared absorption by the users of the first user group.
  • a luminescent substance is selected as the first feature substance 14, which in the absorption range of the third feature substance 18 emitted.
  • FIG. 4 (a) shows the course 40 of the luminescence emission measured on the back of the bank note 10 along the line II-II after excitation of the first feature substance 14. Since the first feature substance 14 is evenly distributed in the substrate 12 and the back of the bank note does not absorb Contains structures, there is a largely constant emission signal 40, the size of which can serve as a reference value for the subsequent measurement on the front of the banknote. If the luminescence emission is measured along the line II-II on the front side of the bank note 10, the course 42 shown in FIG. 4 (b) is approximately obtained. At the points where the line II-II the coding 24 results or 26 crosses 18 gaps 44 or depressions in the measured due to absorption by the third feature substance Luminescence curve 42. Overall, the information contained in the codes 24 or 26 can thus be read out by an indirect measurement of the IR absorption. Since an interaction effect of the properties of the first and third marking substances is used for the readout process, the security feature is very difficult for third parties to reproduce.
  • FIGS. 5 and 6 Another embodiment of the invention is shown in FIGS. 5 and 6.
  • the banknote 50 has a first and second coding 24, 26 which are printed on the front of the banknote using a printing ink 22 containing a luminescent substance and an infrared-absorbing marking substance.
  • the fourth marking substance 20 is evenly distributed in the paper substrate 12 in the paper substrate 12.
  • the luminescent first feature substance 14 in the form of strips 52 extending over the entire surface of the banknote is introduced in the region of the paper substrate 12 near the surface.
  • the width of the individual strips 52 and the width of the respective spaces 54 form a bar code in which any information about the bank note 10, for example the denomination and currency, is stored in encrypted form.
  • the bar code 52, 54 can be read out by irradiating the back of the banknotes with excitation light and measuring the luminescence emission of the first feature substance 14 along the line VV.
  • the excitation areas of the first and second marking substances are not selected to overlap, so that the bar code is read out 52, 54 and the authenticity check based on the second marking substance do not interfere with each other.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Inspection Of Paper Currency And Valuable Securities (AREA)
  • Credit Cards Or The Like (AREA)

Abstract

La présente invention concerne un document de valeur, en particulier un billet de banque, comprenant un substrat de document de valeur et au moins trois substances caractéristiques différentes destinées à la vérification du document qui présente une première substance caractéristique, et pour lequel une deuxième et une troisième substance caractéristique sont appliquées dans une encre d'impression de façon commune sur le substrat de document de valeur. Selon l'invention, la deuxième substance caractéristique est une substance luminescente et la troisième substance caractéristique est un matériau qui absorbe la lumière dans un domaine spectral particulier.
EP04765833A 2003-10-08 2004-10-05 Document de valeur Ceased EP1673735A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10346634A DE10346634A1 (de) 2003-10-08 2003-10-08 Wertdokument
PCT/EP2004/011127 WO2005036477A1 (fr) 2003-10-08 2004-10-05 Document de valeur

Publications (1)

Publication Number Publication Date
EP1673735A1 true EP1673735A1 (fr) 2006-06-28

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP04765833A Ceased EP1673735A1 (fr) 2003-10-08 2004-10-05 Document de valeur

Country Status (6)

Country Link
US (1) US7845570B2 (fr)
EP (1) EP1673735A1 (fr)
CN (1) CN1867946A (fr)
BR (1) BRPI0415233B1 (fr)
DE (1) DE10346634A1 (fr)
WO (1) WO2005036477A1 (fr)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10346631A1 (de) * 2003-10-08 2005-05-19 Giesecke & Devrient Gmbh Wertdokument
FR2895124B1 (fr) * 2005-12-21 2008-02-08 Banque De France Procede de securisation de documents,machine et procede d'authentification associes.
DE102006017764A1 (de) † 2006-04-12 2007-10-18 Bundesdruckerei Gmbh Sicherheits- und/oder Wertdokument
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US7845570B2 (en) 2010-12-07
WO2005036477A1 (fr) 2005-04-21
BRPI0415233A (pt) 2006-12-12
DE10346634A1 (de) 2005-05-12
CN1867946A (zh) 2006-11-22
US20070158433A1 (en) 2007-07-12
BRPI0415233B1 (pt) 2017-07-18

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