EP0119344A1 - 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
EP0119344A1
EP0119344A1 EP83304762A EP83304762A EP0119344A1 EP 0119344 A1 EP0119344 A1 EP 0119344A1 EP 83304762 A EP83304762 A EP 83304762A EP 83304762 A EP83304762 A EP 83304762A EP 0119344 A1 EP0119344 A1 EP 0119344A1
Authority
EP
European Patent Office
Prior art keywords
document
light
millimicrons
information
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.)
Granted
Application number
EP83304762A
Other languages
German (de)
English (en)
Other versions
EP0119344B1 (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
Original Assignee
Individual
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
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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Classifications

    • 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 an extremely novel and useful anti-photocopying paper.
  • a document has information appearing thereon with at least a portion of the information being located on a front face of the portion of the document, and the front face portion has a colour with a sufficiently low reflection spectral response to render the document portion substantially 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 transmitted light 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.
  • the reflection spectral response is advantageously substantially zero for light with a wavelength below about 625 millimicrons, preferably substantially zero for light with a wavelength below about 650 millimicrons, and more preferably substantially zero for light with a wavelength below about 700 millimicrons.
  • 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 millimicrons to about 5% for light with a wavelength of about 700 millimicrons.
  • the information will be in a substantially black relatively non-translucent colour.
  • the document is particularly resistant to photocopying since photocopiers 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 millimicrons, and are most unlikely to respond to light with a wavelength above about 650 millimicrons. 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 pre-manufactured colour film to a suitable paper.
  • 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 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 millimicrons, with a cut-off at about 625 millimicrons, 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 millimicrons to about 5% at a wavelength of about 700 millimicrons, 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 millimicrons.
  • the reflection spectral response R is very low (substantially zero) below about 700 millimicrons, i.e. less than about 1%, and is also of this order at wavelengths above 700 millimicrons up to about 1,000 millimicrons.
  • 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.
  • the information may be applied to the paper by means of a photocopier from an original document which is not resistant to photocopying.
  • 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 photocopy will be unreadable because the information on the photocopy will not be distinguishable from the background. In other words, the photocopy will show the background in the same colour as the information since the reflection spectral response of the paper is substantially zero below about 700 millimicrons.
  • the document is illustrated 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.
  • Figure 2 shows the relative eye response when viewing the document.
  • Line 1 shows the eye response to viewing by light transmitted through the paper
  • line 2 shows the eye response to viewing by reflected incident light.
  • the transmitted light is easily seen in contrast to the information, particularly at wavelengths to which the human eye is most responsive as indicated by line E in Figure 1.
  • the eye With reflected light, the eye merely perceives the paper to be substantially black and substantially indistinguishable from the information.
  • 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.

Landscapes

  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Paper (AREA)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
  • Credit Cards Or The Like (AREA)
  • Printing Methods (AREA)
  • Cleaning In Electrography (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
  • Ink Jet Recording Methods And Recording Media Thereof (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Inspection Of Paper Currency And Valuable Securities (AREA)
  • Saccharide Compounds (AREA)
  • Medicines Containing Plant Substances (AREA)
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
US475791 1983-03-16
US06/475,791 US4632429A (en) 1981-05-25 1983-03-16 Method of rendering documents resistant to photocopying and anti-copying paper therefor

Publications (2)

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

Citations (4)

* 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
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
US3887742A (en) * 1972-04-13 1975-06-03 Richard E Reinnagel Copy resistant documents
GB2096055A (en) * 1979-09-17 1982-10-13 Auken John A Van Anti-copying systems for copying machines

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55100587A (en) * 1979-01-29 1980-07-31 Toppan Printing Co Ltd Image forming material

Patent Citations (4)

* 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
GB2096055A (en) * 1979-09-17 1982-10-13 Auken John A Van Anti-copying systems for copying machines

Also Published As

Publication number Publication date
AU1811083A (en) 1984-09-20
NO831896L (no) 1984-09-17
CA1214805A (fr) 1986-12-02
DE3375527D1 (en) 1988-03-03
NZ205794A (en) 1987-02-20
HK98688A (en) 1988-12-16
FI831891L (fi) 1984-09-17
NO171099C (no) 1993-01-27
NO171099B (no) 1992-10-19
FI79671B (fi) 1989-10-31
AU560208B2 (en) 1987-04-02
JPH0513318B2 (fr) 1993-02-22
EP0119344B1 (fr) 1988-01-27
JPS59174870A (ja) 1984-10-03
FI831891A0 (fi) 1983-05-26
ATE32274T1 (de) 1988-02-15
DK243283D0 (da) 1983-05-30
DK243283A (da) 1984-09-17
FI79671C (fi) 1990-02-12
ZA833659B (en) 1984-10-31

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