WO2010151177A1 - Élément de sécurité optique, procédé de fabrication et procédé de vérification de l’authenticité d'un objet pourvu de cet élément de sécurité - Google Patents

Élément de sécurité optique, procédé de fabrication et procédé de vérification de l’authenticité d'un objet pourvu de cet élément de sécurité Download PDF

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Publication number
WO2010151177A1
WO2010151177A1 PCT/RU2010/000354 RU2010000354W WO2010151177A1 WO 2010151177 A1 WO2010151177 A1 WO 2010151177A1 RU 2010000354 W RU2010000354 W RU 2010000354W WO 2010151177 A1 WO2010151177 A1 WO 2010151177A1
Authority
WO
WIPO (PCT)
Prior art keywords
carrier
latent images
absorber
light
transparent
Prior art date
Application number
PCT/RU2010/000354
Other languages
English (en)
Russian (ru)
Inventor
Андрей Львович КАРАСЕВ
Original Assignee
Открытое Акционерное Общество "Научно-Производственное Объединение "Криптен"
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 Открытое Акционерное Общество "Научно-Производственное Объединение "Криптен" filed Critical Открытое Акционерное Общество "Научно-Производственное Объединение "Криптен"
Publication of WO2010151177A1 publication Critical patent/WO2010151177A1/fr

Links

Classifications

    • 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
    • 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
    • B42D25/29—Securities; Bank notes
    • B42D2033/04—
    • B42D2033/20—
    • B42D2035/20—
    • 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
    • B42D25/387—Special inks absorbing or reflecting ultraviolet light

Definitions

  • the invention relates to the field of protection against counterfeiting and authentication of valuable documents, in particular, to the manufacture and production of optical security elements carrying hidden images that are practically invisible in natural light to the naked eye and visualized when observed under special lighting conditions, for example, in UV, IR, polarized light or using a combination of several optical elements.
  • the objective of the present invention is to provide a protective optical means with a high degree of protection against counterfeiting, which is also evidence of the authenticity of the protected object.
  • the protective feature is invisible in natural light to the naked eye and is visualized with high contrast when using a visualization device that is simple in design.
  • each protective element which is a single-layer polymer film, can carry several different security features, which significantly increases the level of protection.
  • the tool is designed to protect against counterfeiting and as a sign of authenticity of banknotes, passports and other valuable documents, plastic cards.
  • the main way to use a protective tool is in the form of a transparent window in the protected object.
  • the objective of the present invention is to develop a new type of security element used in the form of a transparent window in the protected object and presented in the form of a transparent polymer layer that carries at least two or more independent and / or coordinated latent images formed using the barrier properties of UV absorbers, and invisible in natural and ultraviolet light to the naked eye, while the protective element obtained in this way provides an increased level of protection, as well as the development of TCA process verifying the authenticity of an object with a security element obtained with providing hidden images with high contrast on screen luminous when irradiated with light in a predetermined wavelength range.
  • an optical security element used in the form of a transparent window in the protected object, which comprises the following steps: a) a carrier is transparent in the visible and ultraviolet regions of the spectrum; b) imprint the latent image on at least one portion of the carrier on one side using a colorless liquid composition containing a UV absorber with a red absorption spectrum at 370-400 nm; c) imprint the latent image on at least on one part of the carrier on the other hand using a colorless liquid composition containing a UV absorber with a red absorption spectrum in the range of 270-360 nm, so that latent images on both sides of the carrier are composed independently of each other and / or are in a predetermined coordinated position with respect to each other with the possibility of providing separate and / or combination of images for visualization, d) subjecting the latent image to curing at a temperature in the range of 70 ° -80 ° C.
  • a polymer film is used as a carrier.
  • the UV absorber is not capable of emitting light under the influence of UV light.
  • the colorless liquid composition from which the latent image is formed comprises 0-10% polymer and 0.3-3% UV absorber; preferably 0-5% polymer and 0.5-1.5% UV absorber.
  • Organic and inorganic substances having high extinction coefficients in the UV part of the spectrum are used as UV absorbers, and the position of the red border of the absorption spectrum is an essential protective feature.
  • the red boundary is the long-wavelength boundary of the absorption spectrum: in the wavelength range shorter than the red boundary, the substance absorbs most of the radiation energy; in the wavelength range longer than the red boundary, the substance transmits most of the radiation energy.
  • the UV absorber is inert with respect to UV light and does not exhibit photoemission of long-wave radiation under the influence of UV light in the range 200- ⁇ 00 nm.
  • UV absorbers compounds with high extinction coefficients are used, from the series: metal ions, organometallic compounds, liquid crystalline substances, benzoates, benzotriazoles.
  • the latent image is imprinted onto the medium by direct printing from a number of: flexographic printing, intaglio printing, screen printing.
  • the security element is formed in such a way that it is part of one of the protected objects: banknotes, passport pages or another valuable document, plastic card.
  • the thin transparent protective layer is a mechanically strong lacquer coating with a thickness of about 1 ⁇ m.
  • an optical security element used in the form of a transparent window in a protected object, consisting of a polymeric carrier transparent in UV light, with hidden images applied to it by direct printing, obtained according to the method described above.
  • a method for verifying the authenticity of an object with a protective optical element in which an object with a protective element, made according to the first aspect of the invention, is placed between a UV light source and a screen that fluoresces under the influence of UV light, wherein element UV light with a wavelength of 365 nm provides visualization on the specified screen only areas with a hidden image formed by a UV absorber with a red border of the absorption spectrum in the range of 370-400 nm; Irradiating the protective element with light with a wavelength of 254 nm provides visualization of areas with latent images formed by UV absorbers with a red border of absorption spectra in the ranges of 270-360 nm and with a red border of the absorption spectrum in the range of 370-400 nm, as a dark image on a luminous screen .
  • portions of the carrier sealed with a UV absorber do not transmit UV light, while the rest of the carrier is transparent to it by definition.
  • a dark image of the areas of the carrier sealed with a UV absorber is obtained on the fluorescent screen, “UV shadow.” to.
  • low-pressure mercury lamps of low pressure are used for verification, generating the most intense lines of the spectrum of emission of mercury - 254 and 365 nm. Using these lines separately allows for separate visualization of latent images in accordance with their red boundaries of the absorption spectrum.
  • the screen is made of a material that scatters light, on one side of which, facing the UV light source, a layer of fluorescent coating is applied.
  • the protective element is formed in such a way that it can withstand temperatures of 180 ° C, since polymers that withstand short-term heating up to 180 0 C are used as a carrier, UV absorbers that are stable at this temperature are used to form a latent image.
  • Fig. L is a cross-sectional view of a security element carrying hidden invisible images.
  • Figure 2 schematically shows the optical spectra of UV absorbers with different red boundaries of the absorption spectrum and the emission spectrum of a low-pressure mercury lamp.
  • Fig. 3 shows a diagram of an implementation of a method for verifying the authenticity of an object with a protective optical element using an appropriate verification device.
  • FIG. 1-3 A description of an optical security element and a method for its manufacture will be described with reference to FIG. 1-3.
  • a carrier 1 which is a polymer film that is transparent in the visible and ultraviolet regions of the spectrum
  • latent images 2 and 2 ' are imprinted on each of its sides, which are invisible in natural and UV light and visualized using a simple structurally the implementation of the device, which will be described below.
  • Hidden images 2 and 2 ' which are separate characters (letters, numbers, logos, ornaments, etc.), are imprinted by direct printing using a colorless liquid composition containing a substance having a high absorption coefficient in the ultraviolet region of the spectrum - UV absorber.
  • polymers are selected that are transparent in the visible and UV spectral regions such as: polyethylene, polypropylene, other polyolefins, polyoxymethylene, polyvinyl alcohol, polyesters, cellulose hydrate and other cellulose derivatives.
  • the liquid colorless composition by which latent images are imprinted is a solution based on water or an organic solvent containing 0-10% (preferably 0-5%) of the corresponding polymer, or UV curable varnish containing
  • UV absorber 0.5-3% (preferably 0.3-1.5%) of the UV absorber.
  • metal ions are used that can form strong complexes with a polymer matrix, for example, copper (I) and (II), iron (III), some organometallic compounds, and also organic compounds from a number of benzoates or benzotriazoles.
  • a polymer matrix for example, copper (I) and (II), iron (III), some organometallic compounds, and also organic compounds from a number of benzoates or benzotriazoles.
  • 2,4-di-tert-butylphenyl-4'-hydroxy-3 ', 5'-di-tert-butylbenzoate which is characterized by a red absorption spectrum border of about 350 nm
  • 2- (2'-hydroxy-3' , 5'-di-tert-amylphenyl) benzotriazole which is characterized by a red absorption spectrum border of about 400 nm.
  • a UV absorber which is an integral part of a colorless liquid composition, can be of a liquid crystalline nature, in this case, a latent image formed using such a UV absorber carries two protective features - an ultraviolet shadow and a latent polarized image.
  • both its surfaces are coated with a thin protective layer 3, transparent in the visible and ultraviolet regions of the spectrum, having a refractive index close to the refractive indices of the carrier material and hidden images, which determines the invisibility of images when observed with the naked eye.
  • the protective layer has high mechanical strength and protects the element from scratches and abrasion.
  • the visualization of latent images is based on the large difference between the optical densities in the UV range of the latent image sections formed by a layer of a UV absorber and an unsealed polymer carrier that practically does not absorb UV light.
  • low-power low-pressure mercury lamps are used for verification, generating the most intense lines in the spectrum of mercury emission - 254 and 365 nm.
  • the Ultramag K-3 authenticity determinant lamp was selected, which allows each line to be used separately for testing. If the red border of the UV absorber forming the image lies in the region of 400 nm (A400 in FIG. 2), the imaging process does not require additional operations, since the sealed areas absorb all the light in the UV region up to 400 nm, and the unsealed areas of the carrier do not absorb this light.
  • the latent image cannot be visualized with the full light of the lamp, since the sealed sections transmit light with a wavelength of 365 nm and do not create a shadow, t .e. the 365 nm line should be filtered, only then the image formed by the AZ 50 absorber will be visualized using the 254 nm line. If the red border of the UV absorber lies in the region of 250 nm. (A250 in FIG. 2), the latent image cannot be visualized with a low-pressure mercury lamp. It is necessary to use another light source, for example, a mercury-xenon lamp with a set of filter elements.
  • FIGS. 2 and 3 A method for verifying the authenticity of an object with a protective optical element according to the invention is disclosed with reference to FIGS. 2 and 3.
  • an object with a protective element is placed between a UV light source and a screen fluorescent under UV light, wherein the protective element is irradiated with UV light with a length 365 nm wavelengths provides visualization of only areas with a latent image formed by a UV absorber with a red absorption spectrum in the range of 370-400 nm, while the image with a red border in at 270-360 nm remains invisible;
  • Irradiation of the protective element with light with a wavelength of 254 nm provides visualization of areas with latent images formed by UV absorbers with both the red border of the absorption spectra in the ranges 270-360 nm and the red border of the absorption spectrum in the range 370-400 nm, as a dark image on a luminous screen, since light with a wavelength of 254 nm is equally effectively absorbed by both
  • the latent image is visualized using a device (Fig. H), consisting of a UV radiation source (designated as UV light in Fig. H), generating mercury lines 254 and 365 nm and a fluorescent screen 4: UV radiation passes through the sections almost without loss polymer carrier 1, unsealed by the UV absorber of the latent image, the protective layers 3, and reaches the screen 4, causing its fluorescence; UV radiation incident on parts of the latent image formed by the UV absorber does not reach screen 4 due to the almost complete absorption of the hidden image, therefore, these parts of the screen do not fluoresce, because are in the UV shadow - the result is a visible image 5 (UV shadow) - dark signs 5 of the image.
  • the claimed invention can be used to protect against falsification of valuable documents: passports, vouchers, banknotes, stocks, check books and to identify the authenticity of these documents.

Landscapes

  • Business, Economics & Management (AREA)
  • Accounting & Taxation (AREA)
  • Finance (AREA)
  • Credit Cards Or The Like (AREA)
  • Inspection Of Paper Currency And Valuable Securities (AREA)

Abstract

L'invention concerne le domaine de la vérification et de la protection des documents de valeur contre la contrefaçon. Lors de la fabrication d'un élément de sécurité on imprime des images cachées (2, 2 ') de chaque côté d'un support (1) qui transparent dans la région de l’ultraviolet visible en utilisant une composition liquide incolore contenant un absorbeur d'UV, le spectre d'absorption des ondes longues dans le rouge étant de l'ordre de 370-400 nm sur un côté du support et 270-360 nm sur l'autre côté du support. Les images sont disposées indépendamment les unes des autres et/ou dans un alignement donné afin de produire une image complexe au moment de la visualisation. Les images cachées sont durcies par l’application de la température. Une fine couche de protection (3) transparente dans la région de l’ultraviolet est appliquée au support (1). L'indice de réfraction de la couche de protection (3) coïncide avec l'indice de réfraction du matériau du support (1) des les images cachées (2, 2 '), assurant ainsi l’invisibilité des bords de formation des images cachées. Le support (1) est constitué d'une fenêtre transparente dans l'objet à protéger.
PCT/RU2010/000354 2009-06-25 2010-06-24 Élément de sécurité optique, procédé de fabrication et procédé de vérification de l’authenticité d'un objet pourvu de cet élément de sécurité WO2010151177A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EA200900975A EA200900975A1 (ru) 2009-06-25 2009-06-25 Оптический защитный элемент, способ его изготовления и способ верификации аутентичности объекта с указанным защитным элементом
EA200900975 2009-06-25

Publications (1)

Publication Number Publication Date
WO2010151177A1 true WO2010151177A1 (fr) 2010-12-29

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PCT/RU2010/000354 WO2010151177A1 (fr) 2009-06-25 2010-06-24 Élément de sécurité optique, procédé de fabrication et procédé de vérification de l’authenticité d'un objet pourvu de cet élément de sécurité

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EA (1) EA200900975A1 (fr)
WO (1) WO2010151177A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150028578A1 (en) * 2013-05-17 2015-01-29 Thomas D. Pawlik Method of authenticating an item
EP3166798B1 (fr) 2014-07-07 2020-08-19 Security Fibres UK Limited Améliorations de documents de sécurité

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EA016337B1 (ru) * 2010-11-03 2012-04-30 Открытое Акционерное Общество "Научно-Производственное Объединение "Криптен" Прозрачный защитный элемент, способ изготовления защитного элемента и способ верификации ценного объекта с указанным защитным элементом

Citations (4)

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US5284364A (en) * 1992-06-10 1994-02-08 Anvik Corporation Increased-security identification card system
US6124970A (en) * 1997-10-20 2000-09-26 Latents Image Technology Ltd. Polymer materials with latent images visible in polarized light and methods for their production
RU2007108437A (ru) * 2004-08-12 2008-09-20 Гизеке Унд Девриент Гмбх (De) Элемент защиты, имеющий основу
EA200801017A2 (ru) * 2008-04-30 2008-10-30 Открытое Акционерное Общество «Научно-Производственное Объединение "Криптен"» Оптический поляризационный защитный элемент и способ его изготовления

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CH690067A5 (de) * 1995-08-10 2000-04-14 Ovd Kinegram Ag Verfahren zur Herstellung teilmetallisierter Gitterstrukturen.
EP1345166A1 (fr) * 2002-03-15 2003-09-17 Kba-Giori S.A. Elément de sécurité pour support de données
DE10351129B4 (de) * 2003-11-03 2008-12-24 Ovd Kinegram Ag Diffraktives Sicherheitselement mit einem Halbtonbild
DE102004044459B4 (de) * 2004-09-15 2009-07-09 Ovd Kinegram Ag Sicherheitsdokument mit transparenten Fenstern

Patent Citations (4)

* 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
US6124970A (en) * 1997-10-20 2000-09-26 Latents Image Technology Ltd. Polymer materials with latent images visible in polarized light and methods for their production
RU2007108437A (ru) * 2004-08-12 2008-09-20 Гизеке Унд Девриент Гмбх (De) Элемент защиты, имеющий основу
EA200801017A2 (ru) * 2008-04-30 2008-10-30 Открытое Акционерное Общество «Научно-Производственное Объединение "Криптен"» Оптический поляризационный защитный элемент и способ его изготовления

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150028578A1 (en) * 2013-05-17 2015-01-29 Thomas D. Pawlik Method of authenticating an item
US9162513B2 (en) * 2013-05-17 2015-10-20 Eastman Kodak Company Method of authenticating an item
EP3166798B1 (fr) 2014-07-07 2020-08-19 Security Fibres UK Limited Améliorations de documents de sécurité

Also Published As

Publication number Publication date
EA013395B1 (ru) 2010-04-30
EA200900975A1 (ru) 2010-04-30

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