EP0428828B1 - Procédé pour la détection des copies - Google Patents

Procédé pour la détection des copies Download PDF

Info

Publication number
EP0428828B1
EP0428828B1 EP90114925A EP90114925A EP0428828B1 EP 0428828 B1 EP0428828 B1 EP 0428828B1 EP 90114925 A EP90114925 A EP 90114925A EP 90114925 A EP90114925 A EP 90114925A EP 0428828 B1 EP0428828 B1 EP 0428828B1
Authority
EP
European Patent Office
Prior art keywords
fluorescent
colour
color
orange
offset ink
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.)
Revoked
Application number
EP90114925A
Other languages
German (de)
English (en)
Other versions
EP0428828A3 (en
EP0428828A2 (fr
Inventor
Folker Jung
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.)
BAYROPA JUNG GmbH
Original Assignee
BAYROPA JUNG 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6393928&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0428828(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by BAYROPA JUNG GmbH filed Critical BAYROPA JUNG GmbH
Publication of EP0428828A2 publication Critical patent/EP0428828A2/fr
Publication of EP0428828A3 publication Critical patent/EP0428828A3/de
Application granted granted Critical
Publication of EP0428828B1 publication Critical patent/EP0428828B1/fr
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
    • G03C5/08—Photoprinting; Processes and means for preventing photoprinting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
    • B41M3/14—Security printing
    • B41M3/144—Security printing using fluorescent, luminescent or iridescent effects
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
    • G03G21/04—Preventing copies being made of an original
    • G03G21/043—Preventing copies being made of an original by using an original which is not reproducible or only reproducible with a different appearence, e.g. originals with a photochromic layer or a colour background

Definitions

  • the invention relates to a method for recognizing copies which are produced by means of a color copier of documents.
  • DE-B 29 08 742 is concerned with the protection against forgery of documents which are copied by means of light-sensitive emulsions. It is assumed that the document is printed with two colors, which have the same reflectance in white light within the human visibility limit and thus appear in the same color. Outside the human visibility limit, however, one color has a steep increase in reflectance. If such a document is reproduced, there is a color shift of the one color in the copy. However, this is only possible if the subtraction color mixing process is used and the reproduction colors do not evenly cover the associated wavebands.
  • a fluorescent film on a document is to be used to prevent the image on the document and located under the film from appearing on the copy.
  • the film absorbs part of the light from the light source of the copier up to a certain wavelength.
  • the light above this Wavelength penetrates the layer and is absorbed by the image and reflected by the background.
  • this contrast is not perceived by the copier, since the layer reflects the absorbed light with a longer wavelength.
  • a fluorescent material is applied to a support and the lacquer is covered with a high-gloss finish, so that the material is not recognizable in normal light, but can be recognized by UV radiation.
  • a marking made of a fluorescent material is applied to the document, which emits visible light when irradiated with an IR radiation source, which light is detected by a detector, whereby a copying process can be interrupted.
  • the task is to design the process in such a way that the color copies produced can be clearly distinguished from the originals.
  • Both paper or cardboard and the printing process must therefore not be expensive.
  • the second requirement is to be able to check the authenticity of these notes by mere visual inspection, preferably without the inspector holding the notes in hand must take.
  • two colors of the same hue are used, one of which is fluorescent and the other non-fluorescent.
  • the print on the original shows a uniform color in normal light, but the non-fluorescent color appears duller.
  • the fluorescent color is falsified and also reproduced with a blunt effect and contrasts in color with the other color that has not been falsified.
  • the non-fluorescent color having a hue which corresponds to the color tone of the fluorescent color which was falsified when copied.
  • the original thus has different shades, one of which is dull, while the copy appears in a uniform dull shade.
  • the method is particularly suitable if the documents are, for example, tickets that are checked by inspectors and in which the color copies can be distinguished from the original tickets by a significantly different color.
  • the color differences between the document and the color copies can be seen from afar.
  • the effect of a fluorescent color is used to absorb light up to a certain wavelength and in a longer wavelength to reflect.
  • orange or yellow-orange are used as fluorescent offset colors, then these colors are reproduced on the color copy in light to medium brown color. If the fluorescent offset color is red, then this red appears in the color red-brown on the copy. If the fluorescent offset color is pink, then this color appears in the color copy in magenta. However, the non-fluorescent colors orange or yellow-orange, red and pink appear correct on the copy.
  • the documents and the color copies can also be distinguished by the fact that the color copies show no fluorescence of the colors, which means that they appear significantly duller than on the original documents.
  • a fluorescent color and a non-fluorescent color with different hues in the document, wherein the non-fluorescent color has a hue that corresponds to the distorted hue of the fluorescent color in the copy.
  • the document therefore does not have a uniform color tone, while a uniform color tone is reproduced on the color copy.
  • Preferred color combinations are fluorescent orange or yellow-orange and non-fluorescent medium brown, fluorescent red and non-fluorescent red-brown as well as fluorescent pink and non-fluorescent magenta.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Credit Cards Or The Like (AREA)
  • Printing Methods (AREA)
  • Cleaning In Electrography (AREA)
  • Holo Graphy (AREA)
  • Photoreceptors In Electrophotography (AREA)
  • Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems (AREA)

Claims (10)

  1. Procédé pour la détection de copies, réalisées au moyen d'un photocopieur couleur, de documents tels que, par exemple, des titres de transport, caractérisé en ce que le document est imprimé avec une encre offset fluorescente et une encre offset non fluorescente dont les tonalités sont sensiblement identiques, et en ce que l'encre fluorescente est reproduite par le photocopieur couleur dans une tonalité altérée oui peut être distinguée de celle de la copie de l'encre non fluorescente.
  2. Procédé pour la détection de copies, réalisées au moyen d'un photocopieur couleur, de documents tels que, par exemple, des titres de transport, caractérisé en ce que le document est imprimé avec une encre offset fluorescente et une encore offset non fluorescente, qui sont différentes entre elles quant à leurs tonalités, et en ce que l'encre offset non fluorescente présente une tonalité qui correspond à la tonalité altérée de la copie de l'encre fluorescente.
  3. Procédé selon la revendication 1, caractérisé en ce que la tonalité utilisée est la couleur orangée.
  4. Procédé selon la revendication 1, caractérisé en ce que la tonalité utilisée est la couleur jaune-orangé.
  5. Procédé selon la revendication 1, caractérisé en ce que la tonalité utilisée est la couleur rouge.
  6. Procédé selon la revendication 1, caractérisé en ce que la tonalité utilisée est la couleur rose.
  7. Procédé selon la revendication 2, caractérisé en ce que l'on utilise de l'encre offset fluorescente de couleur orangée ou jaune-orangé et de l'encre offset non fluorescente de couleur brun moyen.
  8. Procédé selon la revendication 2, caractérisé en ce que l'on utilise de l'encre offset fluorescente de couleur rouge et de l'encre offset non fluorescente de couleur rouge-brun.
  9. Procédé selon la revendication 2, caractérisé en ce que l'on utilise de l'encre offset fluorescente de couleur rose et de l'encre offset non fluorescente de couleur magenta.
  10. Procédé selon l'une des revendications 1 à 9, caractérisé en ce que l'on utilise côte à côte plusieurs encres offset fluorescentes.
EP90114925A 1989-11-21 1990-08-03 Procédé pour la détection des copies Revoked EP0428828B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3938603A DE3938603A1 (de) 1989-11-21 1989-11-21 Verfahren zum erkennen von kopien
DE3938603 1989-11-21

Publications (3)

Publication Number Publication Date
EP0428828A2 EP0428828A2 (fr) 1991-05-29
EP0428828A3 EP0428828A3 (en) 1991-08-14
EP0428828B1 true EP0428828B1 (fr) 1994-06-15

Family

ID=6393928

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90114925A Revoked EP0428828B1 (fr) 1989-11-21 1990-08-03 Procédé pour la détection des copies

Country Status (3)

Country Link
EP (1) EP0428828B1 (fr)
AT (1) ATE107234T1 (fr)
DE (2) DE3938603A1 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IL99930A0 (en) * 1991-11-01 1992-08-18 Egged Israel Transport Coopera Low contrast color combination for preventing copying via color photocopying
DE4220344C2 (de) * 1992-06-24 1994-06-23 Trautwein Gmbh & Co Gegen Vervielfältigung und/oder mißbräuchliche Entfernung und Wiederverwendung geschützte Plakette
DE4236143A1 (de) * 1992-10-26 1994-04-28 Bayer Ag Gegen unbefugtes Kopieren geschützte Substrate und Verfahren zu ihrer Herstellung
EP0603117B1 (fr) * 1992-12-03 1996-12-27 Ciba-Geigy Ag Procédé pour la fabrication des papiers de sécurité imprimés et colorés
IT1275363B (it) * 1994-07-21 1997-08-05 Alagao Ag Procedimento per la protezione anticontraffzione di documenti realizzati su supporti di carta o di altri materiali opportuni
DE29501488U1 (de) * 1995-01-31 1995-03-30 Granderath Gmbh J Fälschungssicherer Fahrausweis
DE29513468U1 (de) * 1995-08-22 1997-01-02 Hummel Gmbh U Co Fälschungssicheres Dokument
GB9719459D0 (en) * 1997-09-12 1997-11-12 Bank Of England Printed articles
GB2370349A (en) * 2000-12-19 2002-06-26 Innovision Res And Technology Information providing apparatus such as a question and answer game
GB0228303D0 (en) † 2002-12-04 2003-01-08 Rue De Int Ltd Security device and method
KR100908898B1 (ko) * 2004-10-15 2009-07-23 켄지 요시다 도트패턴의 리드 방법
US7520601B2 (en) 2004-10-29 2009-04-21 Agfa Graphics, N.V. Printing of radiation curable inks into a radiation curable liquid layer

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3713861A (en) * 1969-12-04 1973-01-30 Xerox Corp Inhibitor device
US4277514A (en) * 1978-03-07 1981-07-07 Toppan Printing Co., Ltd. Forgery resistant document with colored areas and method for thwarting reproduction of same
DE2910176A1 (de) * 1979-03-15 1980-09-25 Guenter Alt Verfahren und vorrichtung zur kennzeichnung von druckprodukten
JPS58184967A (ja) * 1982-04-23 1983-10-28 Ricoh Co Ltd 機密文書複製防止方法
GB2139955B (en) * 1983-05-20 1987-03-04 Gen Electric Plc Preventing unauthorised copying

Also Published As

Publication number Publication date
ATE107234T1 (de) 1994-07-15
DE59006135D1 (de) 1994-07-21
DE3938603A1 (de) 1991-05-23
EP0428828A3 (en) 1991-08-14
EP0428828A2 (fr) 1991-05-29

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