EP1826728A2 - Elément de sécurité pouvant être marqué au laser - Google Patents

Elément de sécurité pouvant être marqué au laser Download PDF

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Publication number
EP1826728A2
EP1826728A2 EP07003504A EP07003504A EP1826728A2 EP 1826728 A2 EP1826728 A2 EP 1826728A2 EP 07003504 A EP07003504 A EP 07003504A EP 07003504 A EP07003504 A EP 07003504A EP 1826728 A2 EP1826728 A2 EP 1826728A2
Authority
EP
European Patent Office
Prior art keywords
laser
security element
markable
element according
core
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Withdrawn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
EP07003504A
Other languages
German (de)
English (en)
Other versions
EP1826728A3 (fr
Inventor
Peter Schiffmann
Lars Karcher
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.)
Giesecke and Devrient Currency Technology GmbH
Original Assignee
Giesecke and Devrient GmbH
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 Giesecke and Devrient GmbH filed Critical Giesecke and Devrient GmbH
Publication of EP1826728A2 publication Critical patent/EP1826728A2/fr
Publication of EP1826728A3 publication Critical patent/EP1826728A3/fr
Withdrawn legal-status Critical Current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
    • B42D25/40—Manufacture
    • B42D25/405—Marking
    • B42D25/43—Marking by removal of material
    • B42D25/435—Marking by removal of material using electromagnetic radiation, e.g. laser
    • 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
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/24—Ablative recording, e.g. by burning marks; Spark recording
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/28—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using thermochromic compounds or layers containing liquid crystals, microcapsules, bleachable dyes or heat- decomposable compounds, e.g. gas- liberating
    • B41M5/287—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using thermochromic compounds or layers containing liquid crystals, microcapsules, bleachable dyes or heat- decomposable compounds, e.g. gas- liberating using microcapsules or microspheres only
    • 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
    • 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
    • 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
    • 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
    • B42D25/40—Manufacture
    • B42D25/405—Marking
    • 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
    • B41M3/142—Security printing using chemical colour-formers or chemical reactions, e.g. leuco-dye/acid, photochromes

Definitions

  • the invention relates to a laser-markable security element for securing valuables, a method for producing such a security element and a security paper and a data carrier with such a security element.
  • Security elements for the purpose of security, which permit verification of the authenticity of the data carrier and at the same time serve as protection against unauthorized reproduction.
  • security elements may be designed, for example, in the form of a security thread embedded in a banknote, a tear strip for product packaging, an applied security strip or a self-supporting transfer element, such as a patch or a label, which is applied to a value document after its manufacture.
  • laser inscribers are used, for example, based on CO 2 lasers, Nd: YAG lasers or UV lasers.
  • Nd YAG lasers
  • UV lasers there are restrictions with regard to the usable laser-markable feature substances.
  • luminescent materials and many IR absorbers absorbing in the range below 1000 nm or above 1300 nm are markable with Nd: YAG lasers.
  • the present invention seeks to provide a laser-markable security element of the type mentioned, which avoids the disadvantages of the prior art.
  • a wide range of laser-markable feature substances and -complexes for UV and near-infrared lasers for the production of visually and / or machine-detectable UV or IR markers are made available.
  • a generic laser-markable security element contains a laser-markable feature substance with core-shell particles, wherein one of the core and shell materials absorbs the radiation of a marker laser and the other of the core and shell materials does not absorb the radiation of the marker laser.
  • the feature substance of the security element can be marked by laser radiation in the near infrared, in particular at wavelengths of about 1.06 ⁇ m.
  • Nd: YAG lasers or related types of lasers such as Nd: glass or Nd: YVO 4 lasers.
  • the feature substance can be marked by laser radiation in the ultraviolet spectral range.
  • the non-laser absorbing material forms the core of the core-shell particles.
  • the markability of the core-shell particles in this variant by a laser-absorbing shell material generated.
  • the non-laser absorbing material forms the shell of the core-shell particles.
  • the laser-absorbent core material gives the core-shell particles the laser markability.
  • the non-laser absorbing material of the core-shell particles advantageously comprises one or more luminescent substances.
  • the core-shell particles are surrounded by an organic or inorganic protective sheath to prevent separation of substances during laser marking.
  • the feature substance may additionally contain one or more luminescent substances which are not coated with laser-absorbing material.
  • the coated and uncoated luminescent substances can be excitable at the same wavelength or at different wavelengths depending on the desired effect.
  • the non-laser absorbing material may include one or more infrared absorbers.
  • the infrared absorbers are advantageously designed for absorption in the wavelength range between 800 nm and 1000 nm and / or in the range from 1300 nm to 1600 nm.
  • the core-shell particles of the feature substance are expediently surrounded by an organic or inorganic protective sheath in order to prevent material separation during laser marking.
  • the non-laser-absorbing material is a colored pigment, such as Yellow 13 or Red 48. Coating with a laser-ablatable envelope produces a colorful, laser-markable feature substance.
  • luminescent substances IR absorbers, UV absorbers or colored pigments are suitable as laser-absorbing materials in all designs.
  • the invention also includes a method of making a laser-markable security element in which a laser-markable feature substance is produced from core-shell particles by either encapsulating a laser-absorbing material with a non-laser-absorbing material or encapsulating a non-laser-absorbing material with a laser-absorbent material.
  • a security paper for the production of security or value documents is preferably provided with a laser-markable security element of the type described above.
  • the security paper may in particular comprise a carrier substrate made of paper or plastic.
  • the invention further includes a data carrier, in particular a brand article, a value document or the like, which is equipped with a security element of the type described above.
  • FIG. 1 shows a schematic representation of a banknote 10 which is equipped with a security element 12 according to the invention.
  • the security element 12 contains at least one Nd: YAG laser-ablatable luminescent feature substance.
  • the luminescence of the feature substance can be visually visible or lie outside the visible spectral range.
  • the term luminescence encompasses both fluorescence and phosphorescence.
  • the feature substance comprises core-shell particles 20 whose core 22 is formed by a luminescent substance having the desired luminescence behavior. Since the luminescent substance 22 itself is not Nd: YAG laser ablatable, it is encapsulated with a Nd: YAG laser ablatable sheath 24.
  • a dissolved infrared absorber for 1064 nm is grown on the luminescent substance and dried. Alternatively, the IR absorber also be applied by plasma coating on the luminescent.
  • a laser-ablatable core 32 for example composed of an IR absorber for 1064 nm, is coated with a luminescent substance 34 having desired luminescence properties which can not be laser-ablated itself.
  • the core-shell particles of luminescent substance and IR absorber may additionally have one or more protective sheaths 26, as shown in FIG. 2 (c), in order to prevent material separation during laser inscription.
  • the protective sheaths may be inorganic, for example of SiO x , or organic.
  • the dyes known as ADS990MC or ADS1065A of the American Dye Source can be used as the laser-ablatable substances, for example.
  • the dye ADS990MC with the composition C 32 H 30 N 2 S 4 Ni has an absorption maximum in the near infrared at 990 nm
  • the dye ADS1065A having the composition C 62 H 92 N 6 F 12 Sb 2 has an absorption maximum in methanol at 1060 nm.
  • Suitable luminescent substances for the various applications are known to the person skilled in the art.
  • the luminescent substances LUMILUX® CD 135 and CD 140 from Honeywell may be mentioned.
  • Both luminescent substances themselves are not Nd: YAG laserablatierbar, but form in the inventive combination with a laserablatierbaren shell or a laserablatierbaren core
  • Nd YAG-markable feature substance.
  • FIG. 3 shows in (a) a surface 42 printed with a feature substance according to the invention for laser marking with an Nd: YAG laser at 1064 nm.
  • the feature substance contains a luminescent substance luminescent at 1500 nm, which itself does not absorb at 1064 nm, however encapsulated in the manner described above with an IR absorber for 1064 nm.
  • the luminescent feature substance is ablated in regions in the form of a desired marking, as indicated by reference numeral 44 in FIG. 3 (b). The inscribed marking can then be read later in the luminescence light with a suitable sensor for 1500 nm.
  • the invention also allows for the combination of printed and lasered indicia as shown in FIG. Fig. 4 (a) shows an imprinted indicia 52 in which the ink contains a feature substance of the invention.
  • the printed mark can therefore be provided with a further marking 54 by application of the infrared radiation of an Nd: YAG marking laser.
  • the first tag 52 is typically visually recognizable
  • the further tag 54 may be visually or even mechanically recognizable by a suitable sensor. It is particularly appropriate to use the printed label 52 as a static code that is the same for a variety of security elements, while the lasered label 54 is an individual Coding represents, which identifies the respective security element or a valuable object provided with it individually.
  • the feature substances according to the invention can also be constructed more complex than previously described for illustration.
  • the feature substance may comprise a mixture of two or more IR absorber coated luminescent substances which are excited at the same wavelength. In the non-ablated areas, a corresponding mixed color appears in the luminescence; the ablated areas remain without luminescence.
  • the feature substance may contain a yellow and a red luminescent substance, both of which are excited at the same wavelength and of which only the yellow luminescent substance is encapsulated with an IR absorber.
  • the yellow luminescent substance is removed by laser marking, so that the imprint luminesces red in the ablated regions, whereas in the non-ablated regions it is orange in the mixed color.
  • a second IR absorber which does not absorb at the wavelength of the marking laser can also be used as the non-ablatable material.
  • the first IR absorber as described above may be designed for labeling with a Nd: YAG laser at 1064 nm, while the second IR absorber absorbs in the spectral range between 800 nm and 1000 nm.
  • a mark such as a bar code marker
  • a mark can then be inscribed into the printed area, which can be read using common IR sensors for the near infrared.
  • the second IR absorber can also be designed for absorption at other wavelengths, for example at about 1500 nm.
  • the two IR absorbers can additionally have one or more protective sheaths in order to prevent material separation during laser inscription.
  • the protective sheaths may be inorganic, for example SiOx, or organic.
  • Another design option is the use of single or multiple colored pigments, such as Yellow 13 or Red 48, as non-ablatable material.
  • the colored pigments are coated with a laser dye or coated to form a laser-ablatable feature substance.
  • These core-shell particles can also be provided with an organic or inorganic protective cover.
  • a UV absorber tuned to the wavelength of the laser is used as the laser-absorbing material.
  • the UV absorber may also be a luminescent substance.
  • Non-laser-absorbable materials include various luminescent substances, IR absorbers or colored pigments.

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  • Optics & Photonics (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Accounting & Taxation (AREA)
  • Health & Medical Sciences (AREA)
  • Electromagnetism (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Finance (AREA)
  • Business, Economics & Management (AREA)
  • Credit Cards Or The Like (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)
EP07003504A 2006-02-22 2007-02-20 Elément de sécurité pouvant être marqué au laser Withdrawn EP1826728A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102006008247A DE102006008247A1 (de) 2006-02-22 2006-02-22 Lasermarkierbares Sicherheitselement

Publications (2)

Publication Number Publication Date
EP1826728A2 true EP1826728A2 (fr) 2007-08-29
EP1826728A3 EP1826728A3 (fr) 2008-09-03

Family

ID=38043063

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07003504A Withdrawn EP1826728A3 (fr) 2006-02-22 2007-02-20 Elément de sécurité pouvant être marqué au laser

Country Status (2)

Country Link
EP (1) EP1826728A3 (fr)
DE (1) DE102006008247A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2168780A2 (fr) 2008-09-29 2010-03-31 Giesecke & Devrient GmbH Caractéristique de sécurité pour la sécurisation d'objets de valeur
EP2169650A1 (fr) 2008-09-29 2010-03-31 Giesecke & Devrient GmbH Caractéristique de sécurité pour la sécurisation d'objets de valeur
WO2010103499A1 (fr) * 2009-03-13 2010-09-16 Arjowiggins Security Substrat marquable au laser et procede de fabrication associe
DE102012003601A1 (de) 2012-02-21 2013-08-22 Giesecke & Devrient Gmbh Druckverfahren mit Passer zwischen Druck und Wasserzeichen
WO2014002014A2 (fr) 2012-06-26 2014-01-03 Arjowiggins Security Element en feuille engravable par laser
DE102013218752A1 (de) 2013-09-18 2015-03-19 Bundesdruckerei Gmbh Aktivierbares Wert- oder Sicherheitsprodukt, Verfahren zum Aktivieren und Verfahren zum Herstellen des Wert- oder Sicherheitsproduktes

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010054853A1 (de) 2010-12-17 2012-06-21 Giesecke & Devrient Gmbh Sicherheitselement mit Kennzeichnung
DE102015014539A1 (de) 2015-11-11 2017-05-11 Giesecke & Devrient Gmbh Sicherheitspigment basierend auf Kern-Hülle-Teilchen und Herstellungsverfahren
DE102015014537A1 (de) 2015-11-11 2017-05-11 Giesecke & Devrient Gmbh Sicherheitspigment basierend auf Kern-Hülle-Teilchen und Herstellungsverfahren

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004050767A1 (fr) * 2002-12-04 2004-06-17 Dsm Ip Assets B.V. Composition d'ecriture par laser
WO2005035272A2 (fr) * 2003-10-08 2005-04-21 Giesecke & Devrient Gmbh Papier-valeur

Family Cites Families (4)

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Publication number Priority date Publication date Assignee Title
JPH06210987A (ja) * 1993-01-19 1994-08-02 Canon Inc 非可視化情報記録媒体、非可視化情報検出装置並びに記録剤
DE19704478A1 (de) * 1997-02-06 1998-08-13 Merck Patent Gmbh Lasermarkierbare Papiere und Kartonagen
US6874681B1 (en) * 1999-12-10 2005-04-05 Japan Cash Machine Co. Ltd. Valuable paper distinguishable by a validator for discriminating bills
DE102004021388A1 (de) * 2004-04-30 2005-12-01 Daimlerchrysler Ag Positionier- und Bearbeitungssystem und geeignetes Verfahren zum Positionieren und Bearbeiten mindestens eines Bauteils

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004050767A1 (fr) * 2002-12-04 2004-06-17 Dsm Ip Assets B.V. Composition d'ecriture par laser
WO2005035272A2 (fr) * 2003-10-08 2005-04-21 Giesecke & Devrient Gmbh Papier-valeur

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2168780A2 (fr) 2008-09-29 2010-03-31 Giesecke & Devrient GmbH Caractéristique de sécurité pour la sécurisation d'objets de valeur
EP2169650A1 (fr) 2008-09-29 2010-03-31 Giesecke & Devrient GmbH Caractéristique de sécurité pour la sécurisation d'objets de valeur
DE102008049512A1 (de) 2008-09-29 2010-04-01 Giesecke & Devrient Gmbh Sicherheitsmerkmal zu Absicherung von Wertgegenständen
DE102008049511A1 (de) 2008-09-29 2010-04-08 Giesecke & Devrient Gmbh Sicherheitsmerkmal zur Absicherung von Wertgegenständen
EP2168780A3 (fr) * 2008-09-29 2012-03-14 Giesecke & Devrient GmbH Caractéristique de sécurité pour la sécurisation d'objets de valeur
WO2010103499A1 (fr) * 2009-03-13 2010-09-16 Arjowiggins Security Substrat marquable au laser et procede de fabrication associe
DE102012003601A1 (de) 2012-02-21 2013-08-22 Giesecke & Devrient Gmbh Druckverfahren mit Passer zwischen Druck und Wasserzeichen
WO2013124059A1 (fr) 2012-02-21 2013-08-29 Giesecke & Devrient Gmbh Procédé avec alignement entre un élément d'impression et un filigrane
WO2014002014A2 (fr) 2012-06-26 2014-01-03 Arjowiggins Security Element en feuille engravable par laser
DE102013218752A1 (de) 2013-09-18 2015-03-19 Bundesdruckerei Gmbh Aktivierbares Wert- oder Sicherheitsprodukt, Verfahren zum Aktivieren und Verfahren zum Herstellen des Wert- oder Sicherheitsproduktes
DE102013218752B4 (de) * 2013-09-18 2021-01-28 Bundesdruckerei Gmbh Aktivierbares Wert- oder Sicherheitsprodukt, Verfahren zum Aktivieren und Verfahren zum Herstellen des Wert- oder Sicherheitsproduktes

Also Published As

Publication number Publication date
EP1826728A3 (fr) 2008-09-03
DE102006008247A1 (de) 2007-08-23

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