EP1233106A1 - Papier de sécurité et autres articles de sécurité - Google Patents

Papier de sécurité et autres articles de sécurité Download PDF

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Publication number
EP1233106A1
EP1233106A1 EP02001228A EP02001228A EP1233106A1 EP 1233106 A1 EP1233106 A1 EP 1233106A1 EP 02001228 A EP02001228 A EP 02001228A EP 02001228 A EP02001228 A EP 02001228A EP 1233106 A1 EP1233106 A1 EP 1233106A1
Authority
EP
European Patent Office
Prior art keywords
security
article according
security article
segment
emission
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
EP02001228A
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German (de)
English (en)
Other versions
EP1233106B1 (fr
Inventor
Christoph Weder
Paul Smith
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.)
Landqart AG
Original Assignee
Landqart AG
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
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Application filed by Landqart AG filed Critical Landqart AG
Publication of EP1233106A1 publication Critical patent/EP1233106A1/fr
Application granted granted Critical
Publication of EP1233106B1 publication Critical patent/EP1233106B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
    • B42D25/21—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose for multiple purposes
    • 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
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • B42D25/378—Special inks
    • B42D25/391—Special inks absorbing or reflecting polarised light
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
    • D21H21/40—Agents facilitating proof of genuineness or preventing fraudulent alteration, e.g. for security paper
    • D21H21/44—Latent security elements, i.e. detectable or becoming apparent only by use of special verification or tampering devices or methods
    • D21H21/48—Elements suited for physical verification, e.g. by irradiation
    • 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
    • G09F3/0291—Labels or tickets undergoing a change under particular conditions, e.g. heat, radiation, passage of time
    • G09F3/0292—Labels or tickets undergoing a change under particular conditions, e.g. heat, radiation, passage of time tamper indicating labels
    • 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
    • G09F3/0291—Labels or tickets undergoing a change under particular conditions, e.g. heat, radiation, passage of time
    • G09F3/0294—Labels or tickets undergoing a change under particular conditions, e.g. heat, radiation, passage of time where the change is not permanent, e.g. labels only readable under a special light, temperature indicating labels and the like
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S283/00—Printed matter
    • Y10S283/901—Concealed data

Definitions

  • the present invention relates to security paper and Security articles in general, ie articles whose counterfeiting prevents or complicates one or more security elements shall be.
  • the present invention relates equally to one Method of making such security items as well Methods of using the same.
  • Security elements are used which have the purpose to prevent the falsification of these objects by unauthorized persons or to complicate (R. van Renesse "Optical Document Security” (1997), Artech House, Boston).
  • Such are equally Security elements used to ensure authenticity or To mark the validity of objects or, more generally, to enable or facilitate the identification of objects.
  • security threads or - Stripes for example made of a metal coated Plastic can exist in security papers, in particular wide for use in banknotes and similar securities common.
  • security threads or strips for example be embedded in the security paper and this If necessary, these security elements can then be printed not easily recognized when the object is in Reflection is considered. But they appear as a dark shadow, when the object is illuminated and thus in transmission is observed.
  • security against counterfeiting Security articles for example security papers guarantee many suggestions have been made recently been made to security elements with certain properties provided so that not only the presence of security elements in and of itself, but especially the existence special properties the authenticity of the secured object guarantee (US 4,897,300; US 5,118,349; US 5,314,739; US 5,388,862; US 5,465,301, DE-A 1,446,851; GB 1,095,286).
  • a security thread which has a multi-colored micro-printing; the printing ink can also be fluorescent. With Different colors are printed on this thread so small or so close together that they are not visible to the naked eye can be distinguished and therefore the viewer as monochrome patterns appear.
  • the micro-printing and their different colors can be contrasted with a magnifying glass or of a microscope.
  • a similar Security element is described in GB 1,095,286, the in that prior art patent claimed micro-printing consists of signs and patterns.
  • US 4,897,300 describes a security paper in which several security threads are embedded with different, luminescent dyes are printed.
  • the latter are colorless or paper colored in the unexcited state therefore not or only barely visible to the viewer.
  • Excitation for example by irradiation with ultraviolet (UV) Light, luminesce the security threads, which have a size, which enables detection by the naked eye. additionally result from the overlapping of different colors Security threads characteristic mixed colors.
  • a security thread or strip is therefore made Plastic so integrated into the paper so that "window" in the Paper surface gives a direct view of parts of the surface of the Release security elements, such as in GB 1,552,853, GB 1,604,463 or EP 0,059,056.
  • security paper and others To create security articles their identification by such Security elements made possible or facilitated or their Authenticity or validity through such security elements is marked.
  • Other objects of the present invention are developing a method of making this Security articles and their use. These tasks are solved according to the invention in that security elements are used, which have at least one photoluminescent Have segment which is linearly polarized Photoluminescence and / or linearly polarized absorption is marked.
  • security element refers to a, for example, shaped object which can have a wide variety of shapes, for example, but not only, fiber, thread, rod, film, sheet, layer, tape, plate, disc, snippet and / or combinations thereof ,
  • the security element can be homogeneous and continuous and can be structured or patterned and can contain several individual elements, zones or pixels.
  • security article refers to objects whose counterfeiting is to be prevented or made more difficult by one or more security elements or whose authenticity or validity is to be identified by one or more security elements or which are to be identified by one or more security elements, for example, but not only, Banknotes, checks, shares, bonds, ID cards, passports, driver's licenses, entrance tickets, stamps, bank cards, credit cards.
  • security paper refers to security items that consist essentially of paper.
  • the polar axis of a linear polarizer or analyzer is the direction of the electric field vector of light that is transmitted through the polarizer or analyzer.
  • the polarization axis of a segment or - if applicable as appropriate - security elements or another object is the direction of the electric field vector of light which is emitted or absorbed by the corresponding segment, security element or other object.
  • a segment is a part of an object, in particular a security element, on which the characteristic degree of polarization and the polarization axis for the emission and absorption are adequately determined can be.
  • the degree of polarization for the emission is expressed by the dichroic ratio in emission .
  • the dichroic ratio in emission is defined as the ratio of the integrated photoluminescence emission spectra measured, with unpolarized excitation, by a linear polarizer whose polar axis is arranged parallel and perpendicular to the polarization axis of the examined segment.
  • the degree of polarization for absorption is expressed by the dichroic ratio in absorption .
  • the dichroic ratio in absorption is defined as the ratio of the absorptions measured at the excitation wavelength by a linear polarizer (analyzer) whose polar axis is arranged parallel and perpendicular to the polarization axis of the examined segment.
  • the excitation wavelength is defined as the wavelength that is used for optical excitation for the photoluminescence of the security element or its photoluminescent segments.
  • absorption and emission refer to optical processes.
  • Dichroic properties of a film made of 2% by weight EHO-OPPE / UHMW-PE with a draw rate of 80 (in the referred to below as material A).
  • Polarized absorption spectra recorded for incident Light which is parallel (solid line) and perpendicular (dashed line) is polarized to the polarization axis of the film.
  • Polarized emission spectra under isotropic excitation at 365 nm measured by a polarizer (analyzer) with its polar axis parallel (solid line) and perpendicular (dashed line) polarized to the polarization axis of the film.
  • the present invention is based on our surprising Discovery that photoluminescent materials are what by linearly polarized photoluminescence or linear polarized absorption or both are characterized and reflected in can bring a shape according to the invention, security elements can be manufactured, which for the production of Security papers and security articles in general can be used.
  • security papers according to the invention and Security articles in general through great counterfeit security and distinguish easily recognizable authenticity features.
  • Such materials brought into a suitable form and for the production of Security elements are used that make up Have security papers and security articles manufactured.
  • the Security element can have various forms, for Example, but not only, fiber, thread, rod, film, sheet, layer, Ribbon, plate, disc, snippet and / or combinations thereof.
  • security elements in more complex forms for example, but not only, logos, letters, characters, numbers etc. be used.
  • the surface can also be used, for example of the security element are structured, for example by Printing or embossing.
  • Essential characteristic of Security article according to the present invention is the Fact that the security element is at least one has a photoluminescent segment which is linear polarized photoluminescence and / or linearly polarized Absorption is marked or that the security element has at least one segment that is linearly polarized Absorption is characterized.
  • linearly polarized absorption of such segments causes that to be linear polarized excitation light which, for example, by a external light source in connection with a linear polarizer can be generated by the segment depending on the orientation of the Polarization axis of the segment and the polarization direction of the Excitation light, is absorbed to different degrees, which is the case with the Viewing through the naked eye to a strong light / dark Contrast can result.
  • a part becomes a segment an object, in particular a security element, at which the characteristic degree of polarization for the emission and the absorption can be adequately determined.
  • this Segments may differ from case to case and the Polarization measurements with various experimental Arrangements, for example conventional spectrometers, microscopic methods etc.) can be done.
  • Is considered Security element for example, a uniaxially oriented film from Dimensions 5 cm x 5 cm x 2 ⁇ m from material A (see example A) If necessary, the entire film can be used as a segment be considered when measuring the degree of polarization in the can be done essentially at any point and from it in Framework of measurement and production accuracy essentially but comparable results with regard to the degree of polarization Polarization axis can be obtained.
  • Example a fiber shaped into a circle with a Diameter of 0.5 mm and a length of 20 cm from the same Material can be considered as a combination of many segments, because the polarization axis in this determined from polarization measurements Case has a strong dependence on location.
  • this element shows this element also optical effects, analogous to the above described and in the sense of this invention, which by a Combination of individual segments can be described.
  • the security elements in security articles according to the present invention suitably contain one or more luminescent dyes which cause the polarization properties according to the present invention.
  • Suitable luminescent dyes can be found, for example, in European patent applications 97111229.7 and 98101520.9 and in the publications and patents cited in these patent applications.
  • certain oligomers and polymers for example poly (2,5-dialkoxy- p -phenylene ethynylene) derivatives, such as EHO-OPPE and O-PPE or poly (p-phenylene vinylene) Derivatives such as (poly [2-methoxy-5- [2'-ethylhexyloxy] p -phenylene vinylene] (MEH-PPV) are very useful for preferred embodiments of the present invention: Suitable methods for the production of security elements for use according to the present invention can be found, for example, in European patent applications 97111229.7 and 98101520.9 and the publications and patents cited in these patent applications. As can be seen from the following experiments, the security elements or segments of such security elements for use in security articles according to the present invention can be produced, for example, by the anisotropic deformation of ductile mixtures.
  • security threads or strips can be used, according to a preferred Embodiment variant of the present invention, too have different emission colors and in certain Patterns, for example in a special arrangement of the Polarization axes.
  • security elements can be advantageous with different emission colors and the fibers can have a wide variety of shapes, for example stretched or curved fibers can be used, which according to the present invention differ can lead to optical effects.
  • EHO-OPPE samples with number average molecular weights, M n , of 10,000 gmol -1 and 84,000 gmol -1 HMW-EHO-OPPE
  • Ultra high molecular weight polyethylene (UHMW-PE, Hostalen Gur 412, weight average molecular weight ⁇ 4 10 6 gmol -1 , Hoechst AG) was used as the carrier polymer.
  • Xylene puriss. Pa, Fluka AG was used as the solvent.
  • the highly stretched samples from this example have one highly polarized absorption and polarized emission on, as Figure 1 for a film of 2 wt .-% EHO-OPPE with a Draw rate of 80 shows.
  • This special material in the referred to below as material A (measured at an excitation wavelength of 485 nm) Dichroic ratio in absorption of 57, a dichroic Ratio in emission of 27 and a yellow-green emission color on.
  • An analog film of 1% by weight MEH-PPV with one Draw rate of 80 material in the examples below B), however, points (measured at a Excitation wavelength of 510 nm) a dichroic ratio in Absorption of 21, a dichroic ratio in emission of 27 and an orange-red emission color.
  • a security paper was produced by embedding a strip of 1 mm width and a thickness of approximately 2 ⁇ m made of material A (2) in a paper (1) with the dimensions 17 cm x 7 cm, so that the polarization axis of the strip is parallel to the short sides of the paper was oriented (Figure 3a).
  • the paper (1) was printed (3) and the stripe (2) was neither clearly visible in normal daylight nor in normal room lighting, neither in reflection nor in transmission by the naked eye.
  • the green-yellow photoluminescence of the strip (2) could be recognized immediately by the naked eye when the security paper was irradiated with a UV lamp (Bioblock, VL-4LC, 4 Watt).
  • Example 1 was repeated, but in addition a second strip of 1 mm wide and about 2 ⁇ m thick made of material B (4 ) was embedded in the paper (1) , so that the polarization axis of this strip (4) parallel to the long sides of the Paper (1) was oriented ( Figure 3b).
  • the paper (1) was printed (3) and the stripes (2 and 4) were neither easily recognizable in normal daylight nor in normal room lighting, neither in reflection nor in transmission by the naked eye.
  • the green-yellow and orange-red photoluminescence of the two strips (2 and 4) could be immediately recognized by the naked eye when the security paper was irradiated with a UV lamp (Bioblock, VL-4LC, 4 watts).
  • Example 1 was repeated, but instead of the strip, fibers with a diameter between approximately 30 and 400 ⁇ m and a length between approximately 1 and 10 mm made of material A (5 ) were embedded in the paper (1) (FIG. 3c).
  • the paper (1) was printed (3) and the fibers (5) could not be seen either in normal daylight or in normal room lighting, neither in reflection nor in transmission by the naked eye.
  • the green-yellow photoluminescence of the fibers could be recognized immediately by the naked eye when the security paper was irradiated with a UV lamp (Bioblock, VL-4LC, 4 watts).
  • a security card was produced by laminating a 0.5 mm wide and approximately 2 ⁇ m thick strip of material A (7) onto an opaque card (6) made of yellow colored PVC with the dimensions 8 cm x 5 cm, such that the polarization axis of the strip (7) was oriented parallel to the short sides of the card (6) ( Figure 3d).
  • the strip (7) was not easily visible to the naked eye in normal daylight or in normal room lighting.
  • the green-yellow photoluminescence of the strip (7) could be recognized immediately by the naked eye when the card was irradiated with a UV lamp (Bioblock, VL-4LC, 4 watts).
  • Example 4 was repeated, but instead of opaque card (6) made of yellow colored PVC, a transparent card made of polycarbonate (8) was used and in addition a second 0.5 mm wide and about 2 ⁇ m thick strip of material B (9) was laminated on, so that the Polarization axis of this second strip (9) was oriented parallel to the long sides of the card (8) ( Figure 3e).
  • the green-yellow and orange-red photoluminescence of the two strips (7 and 9) can be recognized immediately by the naked eye when the card (8 ) has been irradiated with a UV lamp (Bioblock, VL-4LC, 4 watts).

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Credit Cards Or The Like (AREA)
  • Paper (AREA)
  • Burglar Alarm Systems (AREA)
  • Polarising Elements (AREA)
  • Facsimile Transmission Control (AREA)
  • Inspection Of Paper Currency And Valuable Securities (AREA)
EP02001228A 1998-09-25 1999-09-22 Papier de sécurité et autres articles de sécurité Expired - Lifetime EP1233106B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH195898 1998-09-25
CH195898 1998-09-25
EP99942696A EP1115949B1 (fr) 1998-09-25 1999-09-22 Papier de securite et autres articles de securite

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP99942696.8 Division 1999-09-22

Publications (2)

Publication Number Publication Date
EP1233106A1 true EP1233106A1 (fr) 2002-08-21
EP1233106B1 EP1233106B1 (fr) 2004-02-18

Family

ID=4222583

Family Applications (2)

Application Number Title Priority Date Filing Date
EP02001228A Expired - Lifetime EP1233106B1 (fr) 1998-09-25 1999-09-22 Papier de sécurité et autres articles de sécurité
EP99942696A Revoked EP1115949B1 (fr) 1998-09-25 1999-09-22 Papier de securite et autres articles de securite

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP99942696A Revoked EP1115949B1 (fr) 1998-09-25 1999-09-22 Papier de securite et autres articles de securite

Country Status (10)

Country Link
US (1) US7108286B1 (fr)
EP (2) EP1233106B1 (fr)
AT (2) ATE230455T1 (fr)
AU (1) AU754452B2 (fr)
BR (1) BR9914061A (fr)
CA (1) CA2344198C (fr)
DE (2) DE59903926D1 (fr)
ES (1) ES2190245T3 (fr)
PL (1) PL346760A1 (fr)
WO (1) WO2000019016A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006007745A1 (fr) * 2004-07-21 2006-01-26 Landqart Caracteristique de securite et procede de production de cette caracteristique

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1446528B1 (fr) * 2001-11-22 2006-04-26 Landqart Papier infalsifiable et articles infalsifiables
WO2003085608A2 (fr) * 2002-04-04 2003-10-16 Landqart Dispositif de verification de caracteristiques de securite
WO2003085609A2 (fr) * 2002-04-04 2003-10-16 Landqart Dispositif de verification de caracteristiques de securite
AU2003205497C1 (en) * 2002-07-19 2009-05-21 Landqart Security feature for value documents
GB0228303D0 (en) * 2002-12-04 2003-01-08 Rue De Int Ltd Security device and method
EP1452338A1 (fr) * 2003-02-28 2004-09-01 Eidgenössische Technische Hochschule (ETH) Caractéristiques de sécurité dichroiques à motifs
GB0307615D0 (en) * 2003-04-02 2003-05-07 Ucb Sa Authentication means
EP1479797A1 (fr) * 2003-05-22 2004-11-24 Landqart Fibre photoluminescente, papier fiduciaire et d'autres articles de sécurité
CH696744A5 (de) * 2003-07-07 2007-11-15 Landqart Sicherheitspapier und Verfahren zu dessen Herstellung.
DE10331798B4 (de) * 2003-07-14 2012-06-21 Giesecke & Devrient Gmbh Sicherheitselement, Wertgegenstand, Transfermaterial und Herstellungsverfahren
NL1026430C2 (nl) * 2004-06-16 2005-12-19 Vhp Ugchelen Bv Veiligheidspapier, omvattende een door zijden begrensd substraatoppervlak, voorzien van een luminescentie vertonend veiligheidskenmerk.
EA011116B1 (ru) * 2007-10-12 2008-12-30 Альтшулер, Владимир Давидович Защитный элемент, способ его изготовления, содержащая его защитная метка и способ идентификации подлинности изделий, маркированных защитной меткой
CN101519857B (zh) * 2008-02-29 2011-08-24 上海柯斯造纸防伪技术有限公司 激发光光角变化致荧光纤维变色的防伪纤维及防伪材料
US8530863B2 (en) * 2008-12-08 2013-09-10 Spectra Systems Corporation Fluorescence notch coding and authentication
DE102011018852A1 (de) 2011-04-27 2012-10-31 Mitsubishi Hitec Paper Europe Gmbh Wärmeempfindliches Aufzeichnungsmaterial mit Authentifikationsmerkmal
PL233721B1 (pl) * 2017-07-21 2019-11-29 Polska Wytwornia Papierow Wartosciowych Spolka Akcyjna Element zabezpieczajacy dokument, dokument wartosciowy zawierajacy element zabezpieczajacy oraz sposob wytwarzania dokumentu wartosciowego
US20230264504A1 (en) * 2022-02-23 2023-08-24 The Government of the United States of America, as represented by the Secretary of Homeland Security System and method of using planchettes to detect unauthorized copying or counterfeiting in articles of manufacture

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US5284364A (en) * 1992-06-10 1994-02-08 Anvik Corporation Increased-security identification card system
WO1998001817A1 (fr) * 1996-07-06 1998-01-15 The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland Marque secrete et systeme de marquage de securite

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US3276316A (en) 1961-08-02 1966-10-04 Polaroid Corp Process for polarizing ultraviolet light utilizing oriented polymer sheet with incorporated dichroic fluorescent dye
MY102798A (en) * 1987-12-04 1992-10-31 Portals Ltd Security paper for bank notes and the like
GB8811671D0 (en) 1988-05-17 1988-06-22 Wiggins Teape Group Ltd Security & decorative paper
US5204038A (en) * 1990-12-27 1993-04-20 The Regents Of The University Of California Process for forming polymers
GB2250474B (en) * 1990-12-04 1994-04-20 Portals Ltd Security articles
US5532104A (en) * 1993-08-19 1996-07-02 Olympus Optical Co., Ltd. Invisible information recording medium
US5746949A (en) * 1995-11-21 1998-05-05 Hoechst Celanese Corp. Polarizer films comprising aromatic liquid crystalline polymers comprising dichroic dyes in their main chains
EP0933655A1 (fr) * 1998-01-29 1999-08-04 ETHZ Institut für Polymere Polariseurs photoluminescents efficaces, procédé pour leur fabrication, et leur application à des dispositifs d'affichage

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5284364A (en) * 1992-06-10 1994-02-08 Anvik Corporation Increased-security identification card system
WO1998001817A1 (fr) * 1996-07-06 1998-01-15 The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland Marque secrete et systeme de marquage de securite

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006007745A1 (fr) * 2004-07-21 2006-01-26 Landqart Caracteristique de securite et procede de production de cette caracteristique

Also Published As

Publication number Publication date
ES2190245T3 (es) 2003-07-16
ATE259918T1 (de) 2004-03-15
EP1115949B1 (fr) 2003-01-02
AU754452B2 (en) 2002-11-14
AU5615099A (en) 2000-04-17
ATE230455T1 (de) 2003-01-15
EP1233106B1 (fr) 2004-02-18
DE59908606D1 (de) 2004-03-25
EP1115949A1 (fr) 2001-07-18
US7108286B1 (en) 2006-09-19
DE59903926D1 (de) 2003-02-06
PL346760A1 (en) 2002-02-25
WO2000019016A1 (fr) 2000-04-06
CA2344198C (fr) 2007-05-01
CA2344198A1 (fr) 2000-04-06
BR9914061A (pt) 2001-06-19

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