GB2173767A - Security markings - Google Patents

Security markings Download PDF

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Publication number
GB2173767A
GB2173767A GB08508702A GB8508702A GB2173767A GB 2173767 A GB2173767 A GB 2173767A GB 08508702 A GB08508702 A GB 08508702A GB 8508702 A GB8508702 A GB 8508702A GB 2173767 A GB2173767 A GB 2173767A
Authority
GB
United Kingdom
Prior art keywords
pattern
marking
composite pattern
patterns
security
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.)
Withdrawn
Application number
GB08508702A
Other versions
GB8508702D0 (en
Inventor
Andrew James Smith
David James Remnant
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
Application filed by Individual filed Critical Individual
Priority to GB08508702A priority Critical patent/GB2173767A/en
Publication of GB8508702D0 publication Critical patent/GB8508702D0/en
Publication of GB2173767A publication Critical patent/GB2173767A/en
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
    • G11B23/28—Indicating or preventing prior or unauthorised use, e.g. cassettes with sealing or locking means, write-protect devices for discs
    • G11B23/281—Indicating or preventing prior or unauthorised use, e.g. cassettes with sealing or locking means, write-protect devices for discs by changing the physical properties of the record carrier
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
    • G09F3/02—Forms or constructions
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
    • G09F3/02—Forms or constructions
    • G09F2003/0276—Safety features, e.g. colour, prominent part, logo

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  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Printing Methods (AREA)

Abstract

In a method of producing a security marking two sheets of acetate each bearing a grid of spaced lines are superimposed with one grid inclined relative to the other to produce a "moire" effect. The resulting composition pattern is photographed for printing by off-set lithography using an ultra-violet tinting medium so that at least one component of the pattern is not readily visible. Prints of the resulting pattern are applied to an article to be marked or label for the article. The arrangement is particularly suitable for marking video or audio cassettes.

Description

SPECIFICATION Security markings This invention relates to security markings which may be applied for example to video, audio or data recordings so that a genuine recording can be distinguished from an unauthorised copy.
In accordance with one aspect of the present invention there is provided a method of producing a security marking comprising the steps of taking at least two patterns, forming a composite pattern by superimposition of the two patterns, and reproducing the composite pattern on an article to be marked, or a label therefor, using a medium having at least a component which is not readily visible.
Preferably, the composite pattern is reproduced by printing using an ultra-violet tinting medium.
Furthermore, the two patterns are preferably such that a more' effect is produced in the composite pattern.
In accordance with another aspect of the present invention, there is provided a security marking in which a more' pattern is formed on a substrate, the moor6 pattern being visible under ultra-violet light.
Thus, a composite pattern can be produced which is unique even when the two basic patterns are each, for examplae, a simple fine grid of lines or an array of small dots. In order to check whether an article bearing a marking is genuine, firstly a check is made using an ultra-violet source to see whether the article bears such a security marking. If it does, then the pattern on the marking can be compared with a copy of the authentic composite pattern to see whether the marking corresponds.
It is difficult to forge such a security marking.
Specialised equipment would be necessary to photograph the marking because ultraviolet light is needed to render the marking visible; ultraviolet light would fog a normal photograph. Furthermore, copying using other methods is difficult in view of the intricacy of the pattern. The authentic security markings are, however, relatively simple and cheap to be produced.
There follows a description of an example of the invention.
Two sheets of acetate each bear a grid of lines with a spacing of, for example, 4 lines per millimetre. The sheets are superimposed with one grid inclined relative to the other so that a moor6 effect is produced. The composite pattern produced by the two grids is photographed, and the photograph is used as the artwork for printing the composite pattern by offset lithography using an ultra violet tinting medium on sticky-backed labels to be affixed to video cassettes. The artwork is also used to produce an image of the composite pattern in normal inks for use in checking the authenticity of the security markings.
The markings may be of any desired size. They may be printed directly onto the recording cassette and/or onto an information leaflet provided with each recording.
Different composite patterns may be used for different recordings.
1. A method of producing a security marking comprising the steps of taking at least two patterns, forming a composite pattern by superimposition of the two patterns, and reproducing the composite pattern on an article to be marked, or a label therefor, using a medium having at least a component which is not readily visible.
2. A method as claimed in Claim 1, wherein the composite pattern is reproduced by printing using an ultra-violet tinting medium.
3. A method as claimed in Claim 1 or 2, wherein the two patterns are such that a moor6 effect is produced in the composite pattern.
4. A method as claimed in any preceding claim, wherein the step of forming the composite pattern includes photographing the two patterns.
5. A method as claimed in any preceding claim, wherein one of the patterns is formed on a translucent sheet, the step of forming the composite pattern including superimposing the translucent sheet on the other pattern.
6. A method of producing a security marking substantially as hereinbefore described.
7. A method as claimed in any preceding claim, in combination with the step of reproducing a ready visible copy of the composite pattern for the purpose of checking the authenticity of security markings.
8. A security marking in which a moor6 pattern is formed on a substrate, the moor6 pattern being visible under ultra-violet light.
9. A security marking as claimed in Claim 8, in the form of a label.
10. A security marking as claimed in Claim 8, wherein the moire pattern is formed on a cassette or housing of a video, audio or data recording.
11. A security marking substantially as hereinbefore described.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (11)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Security markings This invention relates to security markings which may be applied for example to video, audio or data recordings so that a genuine recording can be distinguished from an unauthorised copy. In accordance with one aspect of the present invention there is provided a method of producing a security marking comprising the steps of taking at least two patterns, forming a composite pattern by superimposition of the two patterns, and reproducing the composite pattern on an article to be marked, or a label therefor, using a medium having at least a component which is not readily visible. Preferably, the composite pattern is reproduced by printing using an ultra-violet tinting medium. Furthermore, the two patterns are preferably such that a more' effect is produced in the composite pattern. In accordance with another aspect of the present invention, there is provided a security marking in which a more' pattern is formed on a substrate, the moor6 pattern being visible under ultra-violet light. Thus, a composite pattern can be produced which is unique even when the two basic patterns are each, for examplae, a simple fine grid of lines or an array of small dots. In order to check whether an article bearing a marking is genuine, firstly a check is made using an ultra-violet source to see whether the article bears such a security marking. If it does, then the pattern on the marking can be compared with a copy of the authentic composite pattern to see whether the marking corresponds. It is difficult to forge such a security marking. Specialised equipment would be necessary to photograph the marking because ultraviolet light is needed to render the marking visible; ultraviolet light would fog a normal photograph. Furthermore, copying using other methods is difficult in view of the intricacy of the pattern. The authentic security markings are, however, relatively simple and cheap to be produced. There follows a description of an example of the invention. Two sheets of acetate each bear a grid of lines with a spacing of, for example, 4 lines per millimetre. The sheets are superimposed with one grid inclined relative to the other so that a moor6 effect is produced. The composite pattern produced by the two grids is photographed, and the photograph is used as the artwork for printing the composite pattern by offset lithography using an ultra violet tinting medium on sticky-backed labels to be affixed to video cassettes. The artwork is also used to produce an image of the composite pattern in normal inks for use in checking the authenticity of the security markings. The markings may be of any desired size. They may be printed directly onto the recording cassette and/or onto an information leaflet provided with each recording. Different composite patterns may be used for different recordings. CLAIMS
1. A method of producing a security marking comprising the steps of taking at least two patterns, forming a composite pattern by superimposition of the two patterns, and reproducing the composite pattern on an article to be marked, or a label therefor, using a medium having at least a component which is not readily visible.
2. A method as claimed in Claim 1, wherein the composite pattern is reproduced by printing using an ultra-violet tinting medium.
3. A method as claimed in Claim 1 or 2, wherein the two patterns are such that a moor6 effect is produced in the composite pattern.
4. A method as claimed in any preceding claim, wherein the step of forming the composite pattern includes photographing the two patterns.
5. A method as claimed in any preceding claim, wherein one of the patterns is formed on a translucent sheet, the step of forming the composite pattern including superimposing the translucent sheet on the other pattern.
6. A method of producing a security marking substantially as hereinbefore described.
7. A method as claimed in any preceding claim, in combination with the step of reproducing a ready visible copy of the composite pattern for the purpose of checking the authenticity of security markings.
8. A security marking in which a moor6 pattern is formed on a substrate, the moor6 pattern being visible under ultra-violet light.
9. A security marking as claimed in Claim 8, in the form of a label.
10. A security marking as claimed in Claim 8, wherein the moire pattern is formed on a cassette or housing of a video, audio or data recording.
11. A security marking substantially as hereinbefore described.
GB08508702A 1985-04-03 1985-04-03 Security markings Withdrawn GB2173767A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08508702A GB2173767A (en) 1985-04-03 1985-04-03 Security markings

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08508702A GB2173767A (en) 1985-04-03 1985-04-03 Security markings

Publications (2)

Publication Number Publication Date
GB8508702D0 GB8508702D0 (en) 1985-05-09
GB2173767A true GB2173767A (en) 1986-10-22

Family

ID=10577137

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08508702A Withdrawn GB2173767A (en) 1985-04-03 1985-04-03 Security markings

Country Status (1)

Country Link
GB (1) GB2173767A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2182632A (en) * 1985-10-29 1987-05-20 Ultramark Adhesive Products Li Labels
GB2195270A (en) * 1986-08-22 1988-04-07 Plessey Co Plc Marking of articles with photochromic compounds
WO1995021446A1 (en) * 1994-02-02 1995-08-10 Warner Music Manufacturing Europe Gmbh Identification process of optically readable disk-shaped information carriers
WO2001039138A1 (en) * 1999-11-29 2001-05-31 Ecole Polytechnique Federale De Lausanne (Epfl) New methods and apparatus for authentication of documents by using the intensity profile of moire patterns
FR2830791A1 (en) * 2001-10-15 2003-04-18 Finega Document identifiable under UV light by moire effect and contrast has overprinted motifs in visible and invisible inks

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3594933A (en) * 1969-04-01 1971-07-27 Spectronics Corp Identification device
US3620590A (en) * 1969-05-27 1971-11-16 Applied Laser Technology Inc Holographic method and apparatus for information storage and retrieval
US3628271A (en) * 1969-09-26 1971-12-21 Hc Ind Fluorescent marking
US3668795A (en) * 1969-05-27 1972-06-13 Applied Laser Technology Inc Identification means
US3675948A (en) * 1969-09-10 1972-07-11 American Bank Note Co Printing method and article for hiding halftone images
US3755935A (en) * 1971-05-28 1973-09-04 Maran Plastic Co Double photograph identification card
EP0046327A1 (en) * 1980-08-20 1982-02-24 De Nederlandsche Bank N.V. Printed matter having elements to indicate counterfeiting, and method for manufacturing such printed matter
GB2119111A (en) * 1982-04-16 1983-11-09 Hollusions Limited Method and apparatus for making holograms
GB2136352A (en) * 1982-12-03 1984-09-19 Hollusions Limited Hologram Devices and Method of Manufacture

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3594933A (en) * 1969-04-01 1971-07-27 Spectronics Corp Identification device
US3620590A (en) * 1969-05-27 1971-11-16 Applied Laser Technology Inc Holographic method and apparatus for information storage and retrieval
US3668795A (en) * 1969-05-27 1972-06-13 Applied Laser Technology Inc Identification means
US3675948A (en) * 1969-09-10 1972-07-11 American Bank Note Co Printing method and article for hiding halftone images
US3628271A (en) * 1969-09-26 1971-12-21 Hc Ind Fluorescent marking
US3755935A (en) * 1971-05-28 1973-09-04 Maran Plastic Co Double photograph identification card
EP0046327A1 (en) * 1980-08-20 1982-02-24 De Nederlandsche Bank N.V. Printed matter having elements to indicate counterfeiting, and method for manufacturing such printed matter
GB2119111A (en) * 1982-04-16 1983-11-09 Hollusions Limited Method and apparatus for making holograms
GB2136352A (en) * 1982-12-03 1984-09-19 Hollusions Limited Hologram Devices and Method of Manufacture

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2182632A (en) * 1985-10-29 1987-05-20 Ultramark Adhesive Products Li Labels
GB2182632B (en) * 1985-10-29 1990-07-11 Ultramark Adhesive Products Li Labelling
GB2195270A (en) * 1986-08-22 1988-04-07 Plessey Co Plc Marking of articles with photochromic compounds
GB2195270B (en) * 1986-08-22 1990-05-23 Plessey Co Plc Marking of articles with photochromic compounds
WO1995021446A1 (en) * 1994-02-02 1995-08-10 Warner Music Manufacturing Europe Gmbh Identification process of optically readable disk-shaped information carriers
WO2001039138A1 (en) * 1999-11-29 2001-05-31 Ecole Polytechnique Federale De Lausanne (Epfl) New methods and apparatus for authentication of documents by using the intensity profile of moire patterns
FR2830791A1 (en) * 2001-10-15 2003-04-18 Finega Document identifiable under UV light by moire effect and contrast has overprinted motifs in visible and invisible inks

Also Published As

Publication number Publication date
GB8508702D0 (en) 1985-05-09

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)