EP2158291A2 - Verwendung eines leuchtstoffs als sicherheitsmerkmal, sicherheitsdruckfarbe, verfahren und vorrichtung zum überprüfen eines dokuments sowie dokument und sicherheitsmerkmal - Google Patents
Verwendung eines leuchtstoffs als sicherheitsmerkmal, sicherheitsdruckfarbe, verfahren und vorrichtung zum überprüfen eines dokuments sowie dokument und sicherheitsmerkmalInfo
- Publication number
- EP2158291A2 EP2158291A2 EP08749892A EP08749892A EP2158291A2 EP 2158291 A2 EP2158291 A2 EP 2158291A2 EP 08749892 A EP08749892 A EP 08749892A EP 08749892 A EP08749892 A EP 08749892A EP 2158291 A2 EP2158291 A2 EP 2158291A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- security
- document
- phosphor
- security feature
- luminophore
- 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.)
- Ceased
Links
- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000007639 printing Methods 0.000 title claims description 13
- 238000004020 luminiscence type Methods 0.000 claims abstract description 23
- 239000002105 nanoparticle Substances 0.000 claims abstract description 8
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 24
- 238000005286 illumination Methods 0.000 claims description 2
- 229910052691 Erbium Inorganic materials 0.000 abstract description 11
- 239000000976 ink Substances 0.000 abstract description 8
- 229910052769 Ytterbium Inorganic materials 0.000 abstract description 6
- 239000002245 particle Substances 0.000 abstract description 6
- 230000000638 stimulation Effects 0.000 abstract 1
- 239000013078 crystal Substances 0.000 description 6
- 238000001514 detection method Methods 0.000 description 3
- 238000000295 emission spectrum Methods 0.000 description 3
- 230000005284 excitation Effects 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000001228 spectrum Methods 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 2
- UYAHIZSMUZPPFV-UHFFFAOYSA-N erbium Chemical compound [Er] UYAHIZSMUZPPFV-UHFFFAOYSA-N 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000005022 packaging material Substances 0.000 description 2
- 230000003595 spectral effect Effects 0.000 description 2
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical compound S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 2
- 239000012190 activator Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000012876 carrier material Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000007646 gravure printing Methods 0.000 description 1
- 230000005283 ground state Effects 0.000 description 1
- 238000007641 inkjet printing Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 238000007644 letterpress printing Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000007645 offset printing Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000005424 photoluminescence Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 230000004936 stimulating effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- NAWDYIZEMPQZHO-UHFFFAOYSA-N ytterbium Chemical group [Yb] NAWDYIZEMPQZHO-UHFFFAOYSA-N 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
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
- B42D25/30—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
-
- 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
- B41M3/144—Security printing using fluorescent, luminescent or iridescent effects
-
- 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
- B42D25/29—Securities; Bank notes
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/50—Sympathetic, colour changing or similar inks
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
- C09K11/7766—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals
- C09K11/7767—Chalcogenides
- C09K11/7769—Oxides
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
- G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
- G07D7/06—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using wave or particle radiation
- G07D7/12—Visible light, infrared or ultraviolet radiation
- G07D7/1205—Testing spectral properties
-
- B42D2033/20—
-
- 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
- B42D25/382—Special inks absorbing or reflecting infrared light
Definitions
- the present invention relates to the use of a phosphor with anti-Stokes luminescence, a security ink with a phosphor with anti-Stokes luminescence, a method and a device for checking a document and a document with a security feature.
- Luminescence is always due to a transition from an electron from an energetically higher state to an unoccupied, lower energy state.
- the present case is about photo-luminescence, i. the electron is brought into the upper state by optical excitation.
- the spectral center of gravity of the emission spectrum is generally long-wavelength of the excitation wavelength (Stokes rule).
- the spectral centroid of the emission spectrum is shorter wavelength (ie, higher energy) than the excitation wavelength. This is possible if (at least) two light quanta of the exciting light arrive more or less simultaneously; the first quantum of light raises an electron, and the second quantum of light raises the same electron again, so that it has more energy than any single photon of the exciting light.
- Erbium (Er) is well suited for anti-Stokes luminescence.
- an activator is necessary, especially favorable is ytterbium (Yb).
- Yb is activated by a quantum of light and transfers its energy to an adjacent Er atom. This gets into a relatively stable meta-state. If the Yb atom is activated again during the time when the Er atom is in this meta state Once again, it can transfer its energy again to the Er atom, so that the electron of the Er atom has been raised twice and thus has a higher energy than any single stimulating light quantum. If this electron returns to the ground state, a light quantum with higher energy (ie shorter wavelength) is emitted (anti-Stokes luminescence).
- the energy given off by the Yb does not correspond exactly to the energy required by the Er atom; it is too large in the second increase of the electron of the Er atom. The excess energy must absorb the crystal lattice.
- Oxisulfide as a crystal lattice, eg Y 2 O 2 S. These lattices strong anti-Stokes luminescence occurs.
- Fig. 2 of this document the emission spectrum of (La 0.79 Ybo , 2 oEr 0] oi) 2 ⁇ 2 S is shown. It is noticeable that there are two emission bands here, one at 540 nm (more precisely from 520 nm to 570 nm) and one at 670 nm (more precisely from 640 nm to 680 nm).
- the security element can consist of (Y 1 -xy Yb x Ho y ) 2 O 2 S admixed with (Y 1 -xy Yb x Er y ) 2 O 2S.
- This produces a peak triplet in the green region see Fig. 2, where this is indicated graphically), but this is likely to be difficult to detect in practice (see Fig. 1, in which the triplet is not resolved, and page 10) , Z 10-13 of this document).
- Possible applications are according to WO 2007/003531 banknotes, checks, credit cards, shares, passports, identity documents, driver's licenses, entrance tickets, tokens, tokens, labels, Packaging materials, packaging imprints, seals and the like.
- Such phosphors may also be used to identify branded goods such as clothing, shoes, textiles, household items, electronics and the like.
- Be used where they can then be mounted directly on the object or incorporated in those. Also returnable bottles come into question.
- Suitable printing methods are all customary in the production of security products or packaging materials printing method. These include offset printing, letterpress printing, offset coating, flexographic printing, screen printing, inkjet printing and gravure printing.
- the phosphors may also be added to the carrier material / substrate as additives, e.g. into the plastic material from which credit cards are made.
- the oxysulfide is not optimal in terms of stability, this applies both to the long-term stability and to the temperature stability.
- temperature stability is important if the security element is e.g. to be applied to a credit card which is then laminated. Also in the production of printing inks, temperature stability is often important.
- the object of the invention is thus to provide an alternative phosphor for the
- the security feature is intended to enable rapid detection in readers.
- Y 2 O 3 ie the oxide in contrast to Oxisulfid
- Y 2 O 3 ie the oxide
- Y 2 O 3 is also known as a suitable crystal lattice. It is however, it is also known that in this crystal lattice the anti-Stokes luminescence is significantly weaker than in the case of the oxysulfide. Therefore, compounds of the formula (Y 1 -xy Er x Yb y ) 2 O 3 have not hitherto been considered for use as security elements.
- these phosphors of the formula (Y 1-xy Er x Yb y ) 2 O 3 definitely have sufficient luminescence if x ⁇ 0.20 and y ⁇ 0.075, in particular if x ⁇ 0.15 and y ⁇ 0, 05 is.
- the luminescence is sufficient to be seen with the naked eye.
- a security ink with a phosphor with anti-Stokes luminescence in which the phosphor has the formula (Y 1-xy Yb x Er y ) 2 O 3 with x ⁇ 0.20 and y ⁇ 0.075 protected become.
- the phosphor is present in the form of nanoparticles, because not only is the luminescence favorably influenced, but also the printing is particularly well possible. For larger particles, neither sharp boundaries nor smooth (glossy) surfaces are possible. In addition, these nanoparticles are invisible (apart from their luminescence), so that the security feature is not visible in normal light.
- the two bands are within the visible range, so that colors from green to yellow and orange to red are possible. In this way a visual control without measuring devices is possible.
- the present invention provides a method for checking a document with a security feature in the form of a phosphor having the formula (Yi -xy Yb x Er y ) 2 O 3 , which is characterized in that the security feature or
- the security printing ink is illuminated with an infrared light source, preferably an infrared laser, measures the intensity of the bands emitted by the anti-Stokes luminescence in the range of 540 nm and 670 nm, forms the quotient and compares with a target value previously determined for this phosphor.
- the exciting light has a wavelength of 950 nm to 980 nm, preferably 980 nm.
- An apparatus for performing the method with an infrared laser and at least one light intensity measuring device, which measures the intensity of the light emitted by the security feature after illumination with the infrared laser is characterized in that the light intensity measuring device, the ratio of the intensity of the light in the range of 540 nm to the intensity of the light in the range of 670 nm and compares this ratio with a predetermined value.
- the ratio of the intensity of the two bands is very well constant for each batch of a phosphor and reproducible for decades. This means that the detection devices must recognize (in the case of banknotes, for example, on the basis of the number) which batch is to be used check item and then compare the reading with the value stored for that lot.
- the two bands have relatively large distance from each other (540 nm and 670 nm). It is therefore possible to make do with filters in the detection device which only let light through in the respective area. This is much easier than detecting a triplet with high-resolution spectrometers.
- a security feature with anti-Stokes luminescence which is characterized in that the security feature a phosphor having the formula (Y 1-xy Yb x Er y ) 2 O 3 with x ⁇ 0, 20 and y ⁇ 0.075.
- Fig. 1 shows spectra of 16 different phosphors.
- Chart stand the number of example and the peak ratio. It is amazing how much the spectra change in certain areas, e.g. between Example 15 and Example 16: addition of only 3% Yb causes the peak ratio to change from about 0.6 to 0.14.
Landscapes
- Chemical & Material Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Toxicology (AREA)
- Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Business, Economics & Management (AREA)
- Accounting & Taxation (AREA)
- Finance (AREA)
- Inks, Pencil-Leads, Or Crayons (AREA)
- Luminescent Compositions (AREA)
- Credit Cards Or The Like (AREA)
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
- Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT0067507A AT505007B1 (de) | 2007-04-30 | 2007-04-30 | Verwendung eines leuchtstoffs als sicherheitsmerkmal, sicherheitsdruckfarbe, verfahren und vorrichtung zum überprüfen eines dokumentes sowie dokument und sicherheitsmerkmal |
PCT/EP2008/055296 WO2008132223A2 (de) | 2007-04-30 | 2008-04-30 | Verwendung eines leuchtstoffs als sicherheitsmerkmal, sicherheitsdruckfarbe, verfahren und vorrichtung zum überprüfen eines dokuments sowie dokument und sicherheitsmerkmal |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2158291A2 true EP2158291A2 (de) | 2010-03-03 |
Family
ID=39627416
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08749892A Ceased EP2158291A2 (de) | 2007-04-30 | 2008-04-30 | Verwendung eines leuchtstoffs als sicherheitsmerkmal, sicherheitsdruckfarbe, verfahren und vorrichtung zum überprüfen eines dokuments sowie dokument und sicherheitsmerkmal |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2158291A2 (de) |
AT (1) | AT505007B1 (de) |
WO (1) | WO2008132223A2 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009029395A1 (de) * | 2009-09-11 | 2011-03-24 | G.I.P.C. Holdings Ltd. | Gemenge, lumineszierende Zusammensetzung, Herstellungsverfahren und Verwendung |
AT508253B1 (de) | 2009-10-05 | 2010-12-15 | Oesterreichische Staatsdruckerei Gmbh | Inkjet-tinte |
FR2968667B1 (fr) | 2010-12-13 | 2013-01-11 | Areva | Composant de centrale nucleaire avec marquage par nanoparticules luminescentes, procede et ensemble de lecture correspondants |
DE102019210762A1 (de) * | 2019-07-19 | 2021-01-21 | Bundesdruckerei Gmbh | Verfahren zur Auswertung von flüchtigen nicht resistenten Anti-Stokes-Lumineszenzstoffen auf Wertdokumenten |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4826685A (de) * | 1971-08-11 | 1973-04-07 | ||
GB2258660B (en) * | 1991-08-14 | 1995-06-07 | De La Rue Thomas & Co Ltd | Luminescent materials and their preparation |
US6030657A (en) * | 1994-11-01 | 2000-02-29 | Dna Technologies, Inc. | Labeling technique for countering product diversion and product counterfeiting |
EP1043681A1 (de) * | 1999-04-07 | 2000-10-11 | Sicpa Holding S.A. | Verfahren und Einrichtung zum Anregen eines luminescenten Materials |
DE10056462A1 (de) * | 2000-11-14 | 2002-05-23 | Giesecke & Devrient Gmbh | Fluoreszenzstoff und Verfahren zu dessen Herstellung |
DE10113267B4 (de) * | 2001-03-16 | 2019-05-09 | Bundesdruckerei Gmbh | Verwendung eines Anti-Stokes-Leuchtstoffes in Sicherheitsdokumenten |
DE10208397A1 (de) * | 2002-02-27 | 2003-09-11 | Honeywell Specialty Chemicals | Anti-Stokes-Leuchtstoff-Zusammensetzung |
GB2413334B (en) * | 2002-03-05 | 2006-10-18 | Dainippon Printing Co Ltd | Method of manufacturing fine particles containing rare earth element |
DE10322794B4 (de) * | 2003-05-19 | 2011-08-11 | Bundesdruckerei GmbH, 10969 | Sensor für die Echtheitserkennung eines lumineszierenden Sicherheitselements eines Wertdokuments, Wertdokument sowie Verfahren zur Herstellung eines Wertdokuments |
US8796030B2 (en) * | 2003-07-12 | 2014-08-05 | Parallel Synthesis Technologies, Inc. | Methods for optically encoding an object with upconverting materials and compositions used therein |
DE102005032831A1 (de) * | 2005-06-30 | 2007-01-04 | Bundesdruckerei Gmbh | Holmiumdotierte Anti-Stokes-Leuchtstoffe und Sicherheitsmerkmale mit diesen Leuchtstoffen |
-
2007
- 2007-04-30 AT AT0067507A patent/AT505007B1/de not_active IP Right Cessation
-
2008
- 2008-04-30 WO PCT/EP2008/055296 patent/WO2008132223A2/de active Application Filing
- 2008-04-30 EP EP08749892A patent/EP2158291A2/de not_active Ceased
Non-Patent Citations (1)
Title |
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None * |
Also Published As
Publication number | Publication date |
---|---|
WO2008132223A3 (de) | 2009-01-15 |
AT505007B1 (de) | 2008-10-15 |
WO2008132223A2 (de) | 2008-11-06 |
AT505007A4 (de) | 2008-10-15 |
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Owner name: OESTERREICHISCHE STAATSDRUCKEREI GMBH Owner name: AEROSPACE & ADVANCED COMPOSITES GMBH |
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