EP3393819B1 - Article imprimé, procédé de vérification de l'authenticité d'un article imrimé et système d'articles - Google Patents

Article imprimé, procédé de vérification de l'authenticité d'un article imrimé et système d'articles Download PDF

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Publication number
EP3393819B1
EP3393819B1 EP16831813.7A EP16831813A EP3393819B1 EP 3393819 B1 EP3393819 B1 EP 3393819B1 EP 16831813 A EP16831813 A EP 16831813A EP 3393819 B1 EP3393819 B1 EP 3393819B1
Authority
EP
European Patent Office
Prior art keywords
halftone
approximately
printed
point
circular arc
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.)
Active
Application number
EP16831813.7A
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German (de)
English (en)
Other versions
EP3393819A1 (fr
Inventor
Henrik Ramuta
Stefan Bader
Hanno Schabacker
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.)
Bundesdruckerei GmbH
Original Assignee
Bundesdruckerei 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 Bundesdruckerei GmbH filed Critical Bundesdruckerei GmbH
Publication of EP3393819A1 publication Critical patent/EP3393819A1/fr
Application granted granted Critical
Publication of EP3393819B1 publication Critical patent/EP3393819B1/fr
Active legal-status Critical Current
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/342—Moiré effects
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
    • B42D25/29—Securities; Bank notes
    • 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
    • G07D7/128—Viewing devices
    • 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
    • G07D7/20—Testing patterns thereon
    • G07D7/202—Testing patterns thereon using pattern matching
    • G07D7/207—Matching patterns that are created by the interaction of two or more layers, e.g. moiré patterns

Definitions

  • the invention relates to a printed article, a method for checking the authenticity of a printed article and an article system.
  • Grid generally designates a regular system of intersecting lines (grid lines) which extend over an area to be printed and along which grid dots are arranged as printed elements.
  • grid lines Such raster systems are used in printing technology in order to be able to reproduce halftone images, for example.
  • a printing grid is printed on the surface to be printed.
  • the raster dots included in the print raster are arranged along the raster lines.
  • the raster dots can have different dot shapes, for example round or angular dot areas.
  • the number of raster dots per unit of length is referred to as the raster width or raster frequency. The smaller the dot spacing between adjacent halftone dots, the greater the halftone frequency.
  • amplitude modulated and frequency modulated screens are always the same distance from one another.
  • the grid points themselves can be of different sizes or the same size.
  • frequency-modulated print screens lack uniformity in the screen dot distribution.
  • the raster points are arranged according to a random distribution, resulting in a random distribution of the point distances between adjacent raster points.
  • a security and/or value document in particular a banknote, can be removed, with security features and with a verification element for verifying the security feature.
  • the pamphlet EP 0 279 526 A2 discloses a security document.
  • the pamphlet DE 699 17 947 T2 relates to a method and apparatus for authenticating documents by applying the intensity profile of moiré patterns.
  • the document FR 2 830 791 A discloses a document, such as a banknote or lottery ticket, which is printed with a first motif in a visible ink, oriented at a first angle to a reference axis, and overprinted with a second motif in an ink that is invisible in daylight but invisible under UV light is visible.
  • the second motif appears in a contrasting color to the first motif and is at a second angle to the reference axis; it also includes a third motif at an angle to the other two, revealed by a moiré effect.
  • the object of the invention is to specify improved technologies in connection with the forgery-proof formation of printed articles using halftone printing technology.
  • the authenticity of the printed article should be easily verifiable.
  • a printed article which has a display surface and a printing surface which is arranged in the region of the display surface.
  • the printing surface is printed with a printing grid in which grid dots are arranged at constant grid spacing along grid lines.
  • the grid lines are each designed as a circular arc.
  • a method for checking the authenticity of a printed article is created.
  • a printed article is provided as a test specimen, with the printed article having a printing surface in the region of a visible surface, which is printed with a printing grid in which grid dots are arranged with constant dot spacing along grid lines, each of which is an arc of a circle.
  • a test device is provided in the method.
  • the test means has a transparent test surface with a test print grid printed on it, in which grid dots with the same grid width as the grid dots of the print grid are arranged on the test object.
  • the test equipment is placed on the test item in such a way that the print pattern of the test item and the test print screen of the test equipment overlap.
  • the print screen of the test specimen and the test print screen of the test equipment are shifted relative to one another, for example rotated, until a moiré image becomes visible for the print screen and the test print screen.
  • an article system is created that is prepared for an authenticity check of the type mentioned above.
  • the article system has a printed article and a test device.
  • a printing surface is arranged in the area of a visible surface, which is printed with a printing grid in which grid dots are arranged with constant point or element spacing along grid lines, each of which is an arc of a circle.
  • the test means has a transparent test surface with a test print grid printed thereon, in which grid dots with the same grid width as the grid dots of the print grid are arranged on the printed article.
  • the raster dots of the printing raster can be designed to be the same or different in terms of their dot shape.
  • the dot shape can be round or square.
  • a circular shape or a square shape can be provided.
  • the print screen can be produced as a single color or as a multicolored print screen.
  • the printing surface can partially or completely cover the visible surface of the printed article.
  • a plurality of printing surfaces formed separately from one another can be provided, each of which is printed with a printing grid, it being possible for the printing grids of the printing surfaces which are separated from one another to be of the same or different design.
  • the print screens in different print areas can differ in terms of the dot spacing along the arc-shaped screen lines.
  • the size of the raster dots in the various print areas can be different.
  • the test means can have a plurality of test print grids which are formed with different grid widths, the grid widths corresponding to the grid widths of the plurality of print grids.
  • the test means with several test print grids of different grid widths can be provided regardless of whether the printed article has several print grids. In this way, a test device that can be used for various printed articles can be provided.
  • the printed article can, for example, be a printed document, for example a security document such as an identity card or a passport, in particular made of paper or in the form of a plastic card. Alternatively, it can be a paper document, such as a deed or certificate.
  • the printed document can also consist of materials other than paper, for example a plastic film or a cardboard material.
  • the printing surface with the printing grid arranged thereon can also be arranged on any other article.
  • the print screen can be printed on a sheet, which is then subsequently attached to the article, for example by gluing, which thereby becomes a printed article, ie an article on which the print surface with print screen is arranged.
  • the raster lines of the printing raster can extend along a circular arc in such a way that the raster lines and thus also the raster dots arranged along the raster line are not arranged on a closed circle.
  • the circular arc is not part of a set of several circular arcs that together form a (closed) circle in the printing grid.
  • the raster dots form the elements of the print raster (raster elements) of any size and any shape.
  • the halftone dots can have the same halftone dot size. For example, it can be circular or angular grid points of the same size.
  • the grid point or grid element size may change along the grid line.
  • the halftone dot size can increase steadily or continuously along the halftone line.
  • the changing raster dot size can be provided for individual or all raster lines of the printing raster.
  • the printed screen of the article can have a screen ruling in a range from about 100 lpi to about 700 lpi.
  • the screen ruling of the print screen corresponds to 100 to 700 lines per inch (lpi).
  • the printing screen can be printed using a sympathetic ink.
  • a sympathetic ink For example, it can be a printing ink that only becomes visible when illuminated with UV light.
  • a first tangent to a first point of the circular arc and a second tangent to a second point of the circular arc enclose an angle in the range from about 3 degrees to about 15 degrees, preferably in a range from about 5 degrees to about 10 degrees, which corresponds to the central angle of the circular arc bounded by the first point and the second point, the second point of the circular arc projected perpendicular to the first tangent having a distance along the first tangent in the range from about 10 cm to about 22 cm from the first point of the circular arc.
  • the distance can range from about 15 cm to about 22 cm.
  • the print screen can be an amplitude modulated print screen.
  • the circular arcs of the print screen can all have the same curvature. Alternatively, it can be provided that the circular arcs of the printing screen have different curvatures. For example, a steadily or continuously increasing curvature of the raster lines can be provided over the distribution of the raster lines of the printing raster.
  • the grid points can be arranged along straight grid lines.
  • the raster dots can be arranged along curved lines whose curvature differs from that of the raster lines of the print raster to be checked; in particular, a different arc radius can be provided.
  • the moiré image that occurs when the test piece and test equipment are placed one on top of the other can be visible to the naked eye.
  • the authenticity check is carried out with the aid of an optical imaging system, for example a camera system, with which an image is generated on a screen in order to make the formation of the moiré image detectable.
  • test print grid can be printed on a transparent substrate, for example a transparent plastic film.
  • a printing grid 4 is printed on the material of the printed article 1, for example paper or plastic.
  • the printing screen 4 can be single-colored or multi-colored.
  • the printed article 1 can be, for example, a security document such as an ID card or a passport.
  • the identity card can be designed, for example, as a plastic card, optionally as a chip card.
  • the printed article 1 can be a paper document, for example a document or a certificate.
  • the printing surface 3 with the printing grid 4 arranged thereon can also be arranged on any other articles.
  • the print screen 4 can be printed on a sheet which is then subsequently attached to the article, for example by means of Stick on, which thereby becomes a printed article, ie an article on which the printing surface 3 with the printing grid 4 is arranged.
  • the printing grid 4 has grid dots or elements 5, which are formed with a circular shape in the illustration shown.
  • the grid points 5 are arranged along grid lines 6 with constant point spacing.
  • the grid lines 6 are each an arc of a circle.
  • the halftone dots 5 all have the same dot size.
  • test print grid 10 shows a schematic representation of a test print grid 10 with grid dots 11, which are arranged with constant grid dot spacing or dot spacing along straight grid lines 12.
  • the screen width or screen frequency is the same for the screen dots 5 in the print screen 4 and for the screen dots 11 in the test print screen 10 .
  • the test print grid 10 is printed on a substrate material which is transparent in intermediate areas 13 .
  • the test print grid 10 can be used to carry out an authenticity check for the printed article 1 by the test print grid 10 being placed over the print grid 4 as part of a test medium, for example a hand sheet or a card.
  • the test print grid 10 can be printed, for example, on a transparent film that is part of the test means.
  • the print screen 4 and the test print screen 10 can be arranged superimposed relative to one another during testing in such a way that a moiré image is created for the two screens, which shows curved line structures, which is the result of the combination of the print screen 4 with the circular arc screen lines 6 on the one hand and the beauticianrasters 11 is with the straight grid lines, the two grids are formed in the embodiment shown with the same grid width.
  • the authenticity of the printed article 1 can thus be determined in a simple manner with the aid of the testing means using the characteristic Moiré image. It can be checked whether the printed screen 4 is actually formed with the curved screen lines 6 in the printed article 1 .
  • the grid lines 6 of the printing grid 4 have a rather small curvature, which is a less observant observer may not be able to see it with the naked eye.
  • FIG. 4 shows a schematic representation to explain the curvature of a raster line 20 of the raster lines 6 designed as a circular arc in the printing raster 4.
  • the respective tangents 23, 24 are applied to a section of the raster line 20 in a first point or element 21 and a second point or element 22.
  • the tangents 23, 24 enclose an angle ⁇ , which is in a range from about 5 degrees to about 10 degrees.
  • the first and second points 21, 22 are at a distance s along the tangent 23 to the first point 21. This distance is, for example, about 10 cm to about 22 cm, alternatively about 15 cm to about 22 cm.
  • FIG. 1 shows a schematic representation of an embodiment of the printing screen 4 forming a test specimen, which is arranged on an article.
  • the print screen 4 is formed with screen dots along grid lines in the shape of arcs of a circle.
  • a reference print pattern 50 is shown, in which the raster dots are arranged along straight raster lines.
  • a test print grid 10 is shown, on which the grid points are arranged along straight grid lines.
  • the test print grid 10 is printed on a transparent film.
  • the test print grid 10 is placed on the print grid 4 and the comparison print sample 50 for testing.
  • the screens have a screen width of 70 lpcm (lpcm - lines per cm).
  • Differing moire images 51, 52 are then created by means of relative displacement of the grids on the test specimen and test equipment.
  • the characteristic moire image 51 arises, which differs from the usual moire image 52.

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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 Vision & Pattern Recognition (AREA)
  • Business, Economics & Management (AREA)
  • Accounting & Taxation (AREA)
  • Finance (AREA)
  • Printing Methods (AREA)

Claims (9)

  1. Article imprimé (1), pourvu d'une surface visible (2) et d'une surface d'impression (3), qui est placée dans la zone de la surface visible (2), la surface d'impression (3) étant imprimée avec une trame d'impression (4), sur laquelle des points de trame (5) sont placés avec un écart constant entre les points le long de lignes de trame (6), qui sont chaque fois un arc de cercle (20), une première tangente (23) à un premier point (21) de l'arc de cercle et une deuxième tangente (24) à un deuxième point (22) de l'arc de cercle (20) incluant un angle (β) de l'ordre d'environ 3 degrés à environ 15 degrés, de préférence dans un ordre d'environ 5 degrés à environ 10 degrés, l'angle (β) correspond à l'angle central de l'arc de cercle délimité par le premier point (21) et par le deuxième point (22), et le deuxième point (22) de l'arc de cercle (20) projeté à la perpendiculaire sur la première tangente (23) présentant le long de la première tangente (23) un écart de l'ordre d'environ 10 cm à environ 22 cm par rapport au premier point (21) de l'arc de cercle (20).
  2. Article (1) selon la revendication 1, caractérisé en ce que les points de trame (5) de la trame d'impression (4) présentent la même taille de point de trame.
  3. Article (1) selon la revendication 1, caractérisé en ce que pour des points de trame (5) qui se situent sur la même ligne de trame (6), la taille de point de trame varie le long de la ligne de trame (6).
  4. Article (1) selon au moins l'une quelconque des revendications précédentes, caractérisé en ce que la trame d'impression (4) présente une linéature de trame dans un ordre d'environ 100 Ipi à environ 700 Ipi.
  5. Article (1) selon au moins l'une quelconque des revendications précédentes, caractérisé en ce que la trame d'impression (4) est imprimées à l'aide d'une encre sympathique.
  6. Article (1) selon au moins l'une quelconque des revendications précédentes, caractérisé en ce que la trame d'impression (4) est une trame d'impression modulée en amplitude.
  7. Article (1) selon au moins l'une quelconque des revendications précédentes, caractérisé en ce que les arcs de cercle de la trame d'impression (4) présentent tous la même courbure.
  8. Procédé, destiné à vérifier l'authenticité d'un article (1) imprimé, lors duquel :
    - l'on met à disposition une éprouvette sous la forme d'un article (1) imprimé selon au moins l'une quelconque des revendications précédentes, l'article (1) imprimé comportant dans une zone d'une surface visible (2) une surface d'impression (3), qui est imprimée d'une trame d'impression (4), sur laquelle les points de trame (5) sont placés avec un écart constant entre les points le long de lignes de trame (6), qui sont chacune un arc de cercle, une première tangente (23) à un premier point (21) de l'arc de cercle et une deuxième tangente (24) à un deuxième point (22) de l'arc de cercle (20) incluant un angle (β) de l'ordre d'environ 3 degrés à environ 15 degrés, de préférence dans un ordre d'environ 5 degrés à environ 10 degrés, l'angle (β) correspond à l'angle central de l'arc de cercle délimité par le premier point (21) et par le deuxième point (22), et le deuxième point (22) de l'arc de cercle (20) projeté à la perpendiculaire sur la première tangente (23) présentant le long de la première tangente (23) un écart de l'ordre d'environ 10 cm à environ 22 cm par rapport au premier point (21) de l'arc de cercle (20),
    - l'on met à disposition un moyen d'essai, le moyen d'essai comportant une surface d'essai (13) transparente, avec une trame d'impression (10) d'essai imprimée sur celle-ci, sur laquelle sont placés des points de trame (11) de linéature de trame identique à celle des points de trame (5) de la trame d'impression (4) sur l'éprouvette,
    - l'on pose le moyen d'essai sur l'éprouvette, de telle sorte que la trame d'impression (4) de l'éprouvette et la trame d'impression d'essai (10) du moyen d'essai se chevauchent, et
    - l'on déplace l'une par rapport à l'autre la trame d'impression (4) de l'éprouvette et la trame d'impression d'essai (10) du moyen d'essai, jusqu'à faire apparaître une image moirée pour la trame d'impression (4) et la trame d'impression d'essai (10).
  9. Système d'article, élaboré pour une vérification d'authenticité selon la revendication 8 et comportant :
    - un article (1) imprimé, lequel dans la zone d'une surface visible (2) comporte une surface d'impression (3) qui est imprimée d'une trame d'impression (4), sur laquelle les points de trame (5) sont placés avec chaque fois un écart constant entre les points le long de lignes de trame (6), qui sont chacune un arc de cercle (20), une première tangente (23) à un premier point (21) de l'arc de cercle et une deuxième tangente (24) à un deuxième point (22) de l'arc de cercle (20) incluant un angle (β) de l'ordre d'environ 3 degrés à environ 15 degrés, de préférence dans un ordre d'environ 5 degrés à environ 10 degrés, l'angle (β) correspond à l'angle central de l'arc de cercle délimité par le premier point (21) et par le deuxième point (22), et le deuxième point (22) de l'arc de cercle (20) projeté à la perpendiculaire sur la première tangente (23) comportant le long de la première tangente (23) un écart de l'ordre d'environ 10 cm à environ 22 cm par rapport au premier point (21) de l'arc de cercle (20), et
    - un moyen d'essai, lequel comporte une surface d'essai (13) transparente, pourvu d'une trame d'impression d'essai (10) imprimée sur celle-ci, sur lequel des points de trame (11) sont placés avec la même linéature de trame que les points de trame (5) de de la trame d'impression (4) sur l'article (1) imprimé.
EP16831813.7A 2015-12-23 2016-12-22 Article imprimé, procédé de vérification de l'authenticité d'un article imrimé et système d'articles Active EP3393819B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015122798.3A DE102015122798A1 (de) 2015-12-23 2015-12-23 Bedruckter Artikel, Verfahren zur Echtheitsprüfung eines bedruckten Artikels und Artikelsystem
PCT/DE2016/100613 WO2017108035A1 (fr) 2015-12-23 2016-12-22 Article imprimé, procédé d'authentification d'un article imprimé et système d'articles

Publications (2)

Publication Number Publication Date
EP3393819A1 EP3393819A1 (fr) 2018-10-31
EP3393819B1 true EP3393819B1 (fr) 2022-08-10

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Application Number Title Priority Date Filing Date
EP16831813.7A Active EP3393819B1 (fr) 2015-12-23 2016-12-22 Article imprimé, procédé de vérification de l'authenticité d'un article imrimé et système d'articles

Country Status (3)

Country Link
EP (1) EP3393819B1 (fr)
DE (1) DE102015122798A1 (fr)
WO (1) WO2017108035A1 (fr)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1138011A (en) * 1965-07-06 1968-12-27 Canadian Bank Note Co Ltd Improvements in printed matter for the purpose of rendering counterfeiting more difficult
GB2204272B (en) * 1987-02-18 1991-06-19 Metal Box Plc Security documents
WO1995004665A1 (fr) * 1993-08-10 1995-02-16 Hardy Business Forms Limited Donnees imprimees incrustees, procede et appareil afferents
US6819775B2 (en) * 1996-07-05 2004-11-16 ECOLE POLYTECHNIQUE FéDéRALE DE LAUSANNE Authentication of documents and valuable articles by using moire intensity profiles
DE19729918B4 (de) * 1997-07-04 2010-07-01 Securency International Pty Ltd., Craigieburn Sicherheits- und/oder Wertdokument
DE69917947T2 (de) * 1999-11-29 2005-07-21 Ecole polytechnique fédérale de Lausanne (EPFL) Neue verfahren und vorrichtung zum authentifizieren von dokumenten durch anwendung des intensitätsprofils von moiremuster
FR2830791B1 (fr) * 2001-10-15 2004-01-23 Finega Nouveau support identifiable
DE102011084819B4 (de) * 2011-10-19 2018-08-02 Bundesdruckerei Gmbh Verfahren zur Verifikation eines Sicherheitsdokuments mit einem Muster unter Verwendung einer Anzeigevorrichtung

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Publication number Publication date
WO2017108035A1 (fr) 2017-06-29
EP3393819A1 (fr) 2018-10-31
DE102015122798A1 (de) 2017-06-29

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