EP0119344B1 - Méthode pour rendre des documents résistants à la photocopie et papier anti-copie à cet effet - Google Patents

Méthode pour rendre des documents résistants à la photocopie et papier anti-copie à cet effet Download PDF

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Publication number
EP0119344B1
EP0119344B1 EP83304762A EP83304762A EP0119344B1 EP 0119344 B1 EP0119344 B1 EP 0119344B1 EP 83304762 A EP83304762 A EP 83304762A EP 83304762 A EP83304762 A EP 83304762A EP 0119344 B1 EP0119344 B1 EP 0119344B1
Authority
EP
European Patent Office
Prior art keywords
document
information
front face
light
wavelength
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.)
Expired
Application number
EP83304762A
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German (de)
English (en)
Other versions
EP0119344A1 (fr
Inventor
Norman A. Gardner
Michael P. Voticky
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.)
Individual
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Individual
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Filing date
Publication date
Priority claimed from US06/475,791 external-priority patent/US4632429A/en
Application filed by Individual filed Critical Individual
Priority to AT83304762T priority Critical patent/ATE32274T1/de
Publication of EP0119344A1 publication Critical patent/EP0119344A1/fr
Application granted granted Critical
Publication of EP0119344B1 publication Critical patent/EP0119344B1/fr
Expired legal-status Critical Current

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    • 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

  • This invention relates to rendering documents resistant to photocopying, and inter alia provides a useful anti-photocopying paper.
  • a document has information appearing thereon, with at least a portion of the information being located on a portion of a front face of the document, characterised by said front face portion being coloured so as to produce, in a copying machine being substantially sensitive below 650 nm, a reflection spectral response sufficiently low to render the document portion incapable of being photocopied in an information-readable manner, that is to say with the information having a similar low reflection spectral response, and said document portion being capable of transmitting visible light from the rear face to the front face to cause sufficient contrast between the relatively non-translucent information and the information free background to enable the information to be read by a human eye viewing the front face of the document when visible light is transmitted through the document from the rear face to the front face thereof, said reflection spectral response being substantially zero for light with a wavelength below about 625 nm.
  • the portion of the document carrying information which is not to be photocopied preferably has a transmission factor averaging 3% in the visible light range.
  • the transmission factor ranges from substantially zero for light with a wavelength of about 450 nm to about 5% for light with a wavelength of about 700 nm.
  • the information will be in a substantially black relatively non-translucent colour.
  • the document is particularly resistant to photocopying since photocopies require the document to have an adequate reflection spectral response for light of wavelengths to which the photocopier responds. Most photocopiers do not respond to light with a wavelength above about 625 nm (625 pm), and are most unlikely to respond to light with a wavelength above about 650 nm (650 pm). A document in accordance with the present invention therefore is very effectively resistant to photocopying.
  • a document in accordance with the present invention can be very easily read by means of visible light transmitted through the document from the rear.
  • the visible light may simply be daylight or other ambient light or may be a light which is specifically intended for reading a document in accordance with the present invention.
  • the low reflection spectral response may be provided by applying a suitable ink to a suitable paper or by applying a suitable premanufactured colour film to a suitable paper.
  • Figure 1 is a graph showing the reflection spectral response and transmission factor of anti- photocopying paper in accordance with one embodiment of the invention, and also showing the average spectral response of the human eye and a typical spectral response of a photocopier, and
  • a document comprises a sheet of coloured paper having a transmission factor indicated by the line T and a reflection spectral response indicated by the line T and a reflection spectral response indicated by the line R.
  • Figure 1 also shows the typical spectral response of the human eye by the line E and a possible spectral response of a photocopier by the line P.
  • the line P indicates that the spectral response of the photocopier decreases to zero at a wavelength of about 650 nm (650 um), with a cut-off at about 625 nm (625 ⁇ m), the term 'cut-off' being usually applied to the wavelength at which the spectral response has fallen to less than about 10%.
  • the transmission factor T of the paper increases substantially linearly from zero at a wavelength of about 450 nm (450 pm) to about 5% at a wavelength of about 700 nm (700 pm), therefore averaging about 3% over the visible light range encompassed by the line E. Above the visible light range, the transmission factor increases substantially linearly to about 10% for light with a wavelength of about 1,000 nm (1,000 pm).
  • the reflection spectral response R is very low (substantially zero) below about 700 nm (700 pm), i.e. less than about 1 %, and is also of this order at wavelengths above 700 nm (700 ⁇ m) up to about 1000 nm (1,000 pm).
  • the paper may for example be that sold by Kimberley Clark Corporation under the trade mark UV ULTRA II covered on the front face with matt finished 'black' ink (such as produced by Cal/Ink Limited or Sinclair & Valentine Limited) to give the required transmission factor.
  • Information is then typed, printed or otherwise applied in black or similar dark colour on the front face of the paper so that it is. relatively non-translucent. Any kind of information may of course be applied, including printed, written or drawn text, graphs or illustrations. Frequently, the information may be applied to the paper by means of a photocopier from an original document which is not resistant to photocopying. In such a case, anti-photocopying paper in accordance with the invention will be used as the copy paper in a photocopying machine, with the result that the information will appear on the paper as baked black carbon deposits.
  • the document is illuminated from behind, either by positioning the document so that ambient daylight or artificial light or special artificial light passes therethrough from behind, the information can be easily read by the human eye when viewed from the front because the black or substantially black information will be sufficiently contrasting with the background which is lightened by the transmitted light.
  • the invention is of course applicable to any security documents, including lottery tickets, show and sports events tickets, postal and fiscal stamps, stock shares and bond certificates, credit cards, personal and bank cheques, travellers cheques and bank notes.

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  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Paper (AREA)
  • Credit Cards Or The Like (AREA)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
  • Cleaning In Electrography (AREA)
  • Printing Methods (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
  • Medicines Containing Plant Substances (AREA)
  • Saccharide Compounds (AREA)
  • Ink Jet Recording Methods And Recording Media Thereof (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Inspection Of Paper Currency And Valuable Securities (AREA)

Claims (15)

1. Document porteur d'information y apparaissant, une partie au moins de l'information étant située sur une partie d'un recto du document, caractérisé en ce que ladite partie de recto est colorée de façon à donner, dans une machine à copier sensiblement sensible au-dessous de 650 nm, une réponse spectrale de réflexion assez faible pour rendre ladite partie de document inapte à une photocopie permettant la lecture de l'information, et ladite partie de document étant capable de transmettre la lumière visible du verso au recto pour faire apparaître entre l'information relativement non translucide et le fond exempt d'information un contraste suffisant pour permettre la lecture de l'information par l'oeil humain examinant le recto du document quand de la lumière visible est transmise à travers le document du verso au recto de celui-ci, ladite réponse spectrale de réflexion étant sensiblement nulle pour de la lumière à longueur d'onde inférieure à environ 625 nm.
2. Document selon la revendication 1, dans lequel ladite réponse spectrale de réflexion est sensiblement nulle pour de la lumière à longueur d'onde inférieure à environ 700 nm.
3. Document selon la revendication 1 ou 2, dans lequel ladite partie de document a un facteur de transmission qui est en moyenne d'environ 3 % dans le domaine de la lumière visible.
4. Document selon l'une quelconque des revendications 1 à 3, dans lequel ladite partie de document a un facteur de transmission compris entre une valeur sensiblement nulle poure de la lumière à longueur d'onde d'environ 450 nm et environ 5% pour de la lumière à longueur d'onde d'environ 700 nm.
5. Document selon l'une quelconque des revendications 1 à 4, dans lequel ladite information est d'une couleur sensiblement noire relativement non translucide.
6. Méthode pour rendre un document porteur d'information résistant à la photocopie, cette méthode comprenant l'application de ladite information sur une partie d'un recto du document, caractérisée en ce que ledit recto est coloré de façon à provoquer, dans une machine à copier sensible au-dessous de 650 nm, une réponse spectrale de réflexion assez faible pour rendre ladite partie de document inapte à une photocopie permettant la lecture de l'information, et ladite partie de document étant capable de transmettre de la lumière visible du verso au recto pour établir un contraste suffisant entre l'information relativement non translucide et le fond exempt d'information pour permettre la lecture de l'information par un oeil humain observant le recto du document quand de la lumière visible est transmise à travers le document du verso au recto de celui-ci, ladite réponse spectrale de réflexion étant sensiblement nulle pour de la lumière à longueur d'onde inférieure à environ 625 nm.
7. Méthode selon la revendication 6, dans laquelle ladite réponse spectrale de réflexion est sensiblement nulle pour de la lumière à longueur d'onde inférieure à environ 700 nm.
8. Méthode selon la revendication 6 ou la revendication 7, dans laquelle ladite partie de document a un facteur de transmission qui est d'environ 3 % dans le domaine de la lumière visible.
9. Méthode selon l'une quelconque des revendications 6 à 8, dans laquelle ladite partie de document a un facteur de transmission allant d'une valeur sensiblement nulle pour de la lumière à longueur d'environ 450 nm à environ 5% pour de la lumière à longueur d'onde d'environ 700 nm.
10. Méthode selon l'une quelconque des revendications 6 à 9, dans laquelle ladite information est d'une couleur sensiblement noire non translucide.
11. Papier antiphotocopie présentant un recto coloré de façon à provoquer, dans une machine à copier sensiblement sensible au-dessous de 650 nm, une réponse spectrale de réflexion suffisamment faible pour rendre le document inapte à une photocopie permettant la lecture de l'information, après application d'information par dactylographie ou autrement sur ledit recto, et ledit papier étant apte à transmettre de la lumière visible du verso au recto pour provoquer entre l'information relativement non translucide et le fond exempt d'information un contraste suffisant pour permettre la lecture de l'information par un oeil humain observant le recto du document quand de la lumière visible est transmise à travers le document du verso au recto de celui-ci, ladite réponse spectrale de réflexion étant sensiblement nulle pour de la lumière à longueur d'onde inférieure à environ 625 nm.
12. Papier selon la revendication 11, dans lequel ladite réponse spectrale de réflexion est sensiblement nulle pour de la lumière à longueur d'onde inférieure à environ 700 nm.
13. Papier selon la revendication 11 ou la revendication 12, dans lequel ladite partie de document a un facteur de transmission qui est un moyenne d'environ 3 % dans le domaine de la lumière visible.
14. Papier selon l'une quelconque des revendications 11 à 13, dans lequel ladite partie de document a un facteur de transmission compris entre une valeur sensiblement nulle pour de la lumière à longueur d'onde d'environ 450 nm et environ 5 % pour de la lumière à longueur d'onde d'environ 700 nm.
15. Papier selon l'une quelconque des revendications 11 à 14, dans lequel ladite information est d'une couleur sensiblement noire relativement non translucide.
EP83304762A 1983-03-16 1983-08-17 Méthode pour rendre des documents résistants à la photocopie et papier anti-copie à cet effet Expired EP0119344B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83304762T ATE32274T1 (de) 1983-03-16 1983-08-17 Verfahren um dokumente kopierwiderstandsfaehig zu machen und dazu geeignetes nicht kopierbares papier.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US06/475,791 US4632429A (en) 1981-05-25 1983-03-16 Method of rendering documents resistant to photocopying and anti-copying paper therefor
US475791 1983-03-16

Publications (2)

Publication Number Publication Date
EP0119344A1 EP0119344A1 (fr) 1984-09-26
EP0119344B1 true EP0119344B1 (fr) 1988-01-27

Family

ID=23889168

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83304762A Expired EP0119344B1 (fr) 1983-03-16 1983-08-17 Méthode pour rendre des documents résistants à la photocopie et papier anti-copie à cet effet

Country Status (12)

Country Link
EP (1) EP0119344B1 (fr)
JP (1) JPS59174870A (fr)
AT (1) ATE32274T1 (fr)
AU (1) AU560208B2 (fr)
CA (1) CA1214805A (fr)
DE (1) DE3375527D1 (fr)
DK (1) DK243283A (fr)
FI (1) FI79671C (fr)
HK (1) HK98688A (fr)
NO (1) NO171099C (fr)
NZ (1) NZ205794A (fr)
ZA (1) ZA833659B (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4951163B2 (ja) * 2008-07-03 2012-06-13 美津濃株式会社 スポーツ手袋

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3852088A (en) * 1972-03-20 1974-12-03 Ibm Security document system and method
US3887742A (en) * 1972-04-13 1975-06-03 Richard E Reinnagel Copy resistant documents
FR2247067A5 (en) * 1973-10-04 1975-05-02 Arjomari Prioux Non-photocopiable security document - allows markings to be read by eye but reflects uniform light when illuminated
JPS55100587A (en) * 1979-01-29 1980-07-31 Toppan Printing Co Ltd Image forming material
GB2096055B (en) * 1979-09-17 1985-02-27 Auken John A Van Anti-copying systems for copying machines

Also Published As

Publication number Publication date
FI831891A0 (fi) 1983-05-26
NO831896L (no) 1984-09-17
JPS59174870A (ja) 1984-10-03
JPH0513318B2 (fr) 1993-02-22
AU1811083A (en) 1984-09-20
DE3375527D1 (en) 1988-03-03
FI831891L (fi) 1984-09-17
DK243283D0 (da) 1983-05-30
HK98688A (en) 1988-12-16
NO171099B (no) 1992-10-19
DK243283A (da) 1984-09-17
ZA833659B (en) 1984-10-31
EP0119344A1 (fr) 1984-09-26
FI79671C (fi) 1990-02-12
AU560208B2 (en) 1987-04-02
FI79671B (fi) 1989-10-31
NZ205794A (en) 1987-02-20
NO171099C (no) 1993-01-27
ATE32274T1 (de) 1988-02-15
CA1214805A (fr) 1986-12-02

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