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DE102007006059A1 - Design for producing thermal paper, has layer, which is applied to thermal layer, where acid component is introduced into auxiliary layer with acid color developer of thermal layer - Google Patents

Design for producing thermal paper, has layer, which is applied to thermal layer, where acid component is introduced into auxiliary layer with acid color developer of thermal layer Download PDF

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Publication number
DE102007006059A1
DE102007006059A1 DE200710006059 DE102007006059A DE102007006059A1 DE 102007006059 A1 DE102007006059 A1 DE 102007006059A1 DE 200710006059 DE200710006059 DE 200710006059 DE 102007006059 A DE102007006059 A DE 102007006059A DE 102007006059 A1 DE102007006059 A1 DE 102007006059A1
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Germany
Prior art keywords
layer
thermal
concept according
additional
incorporated
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DE200710006059
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German (de)
Inventor
Peter Dr. Schneider
Marcus Dr. Meyr
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Individual
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Priority to DE200710006059 priority Critical patent/DE102007006059A1/en
Publication of DE102007006059A1 publication Critical patent/DE102007006059A1/en
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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
    • B41M3/142—Security printing using chemical colour-formers or chemical reactions, e.g. leuco-dye/acid, photochromes
    • 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
    • B41M5/40—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used characterised by the base backcoat, intermediate, or covering layers, e.g. for thermal transfer dye-donor or dye-receiver sheets; Heat, radiation filtering or absorbing means or layers; combined with other image registration layers or compositions; Special originals for reproduction by thermography
    • B41M5/41—Base layers supports or substrates
    • 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
    • B41M5/40—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used characterised by the base backcoat, intermediate, or covering layers, e.g. for thermal transfer dye-donor or dye-receiver sheets; Heat, radiation filtering or absorbing means or layers; combined with other image registration layers or compositions; Special originals for reproduction by thermography
    • B41M5/42—Intermediate, backcoat, or covering layers
    • B41M5/423—Intermediate, backcoat, or covering layers characterised by non-macromolecular compounds, e.g. waxes
    • 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
    • D21H21/46—Elements suited for chemical verification or impeding chemical tampering, e.g. by use of eradicators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M2205/00—Printing methods or features related to printing methods; Location or type of the layers
    • B41M2205/04—Direct thermal recording [DTR]
    • 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
    • D21H19/00—Coated paper; Coating material
    • D21H19/80—Paper comprising more than one coating
    • D21H19/84—Paper comprising more than one coating on both sides of the substrate

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Paper (AREA)
  • Heat Sensitive Colour Forming Recording (AREA)

Abstract

The design has a layer, which is applied to a thermal layer (2). The former layer contains organically soluble components. A color creator is brought for coloring, which is embedded in different layers of the thermal paper. An acid component is introduced into an auxiliary layer with an acid color developer of the thermal layer.

Description

Handelsübliche Thermopapiere bestehen aus mehreren Schichten: unter anderem aus einer thermoreaktiven Schicht, in die ein Farbbildner (Leukofarbstoff) mit einem geeigneten Farbentwickler (meist saure Agenzien) eingebettet sind. Durch den Einfluss von Wärme, ausgelöst bevorzugt durch einen Thermodruckkopf, reagiert der Farbentwickler mit dem (gegebenenfalls verkapselten) Leukofarbstoff, und es kommt zu einer Farbreaktion, welche die Informationen des Produkts oder Dokuments (Schrift oder Symbole) offenbart.commercial Thermal papers consist of several layers: among others a thermoreactive layer into which a color former (leuco dye) embedded with a suitable color developer (mostly acidic agents) are. Due to the influence of heat, triggered preferably by a thermal print head, the color developer reacts with the (possibly encapsulated) leuco dye, and it comes to a color reaction, which is the information of the product or document (Scripture or symbols) revealed.

Bei Manipulationsversuchen wird die thermoreaktive Schicht (Thermoschicht) des Thermopapiers mit geeigneten Lösungsmittelzubereitungen (z. B. Haarspray oder Bremsflüssigkeit) in Kontakt gebracht, wodurch folgende Prozesse ablaufen:

  • – Der Farbbildner (Leukofarbstoff) wird gelöst
  • – Eine ggf. vorhandene Trennschicht zwischen Farbbildner und Farbentwickler wird zerstört
  • – Die spezielle Zusammensetzung der Lösungsmittelzubereitungen hebt die Wirkung des Farbentwicklers auf und überführt den Farbbildner in einen meist farblosen Zustand
  • – Das gelöste farblose Farbbildner-Derivat diffundiert in das Basispapier. Infolgedessen wird die im Originalzustand enthaltene Information gelöscht.
In tampering attempts, the thermo-reactive layer (thermal layer) of the thermal paper is brought into contact with suitable solvent preparations (eg hair spray or brake fluid), as a result of which the following processes take place:
  • - The color former (leuco dye) is dissolved
  • - Any existing separation layer between color former and color developer is destroyed
  • The special composition of the solvent preparations neutralizes the action of the color developer and converts the color former into a mostly colorless state
  • - The dissolved colorless color former derivative diffuses into the base paper. As a result, the information contained in the original state is deleted.

Das nunmehr anscheinend unbenutzte Produkt oder Dokument kann in Folge durch das Aufbringen anderweitiger Informationen manipuliert werden. So ist es möglich, den Aufdruck von Thermopapieren wie z. B. Fahrscheinen, Kontoauszügen, Kassenbons oder Garantiebelegen auf beschriebene Art und Weise zu entfernen. So wurden von Betrügern bereits häufig beispielsweise der Aufdruck gebrauchter Fahrscheine gelöscht und diese erneut und missbräuchlich benutzt (z. B. Bericht von Spiegel Online vom 11. Januar 2007 ).The now apparently unused product or document may be subsequently manipulated by the application of other information. So it is possible, the imprint of thermal paper such. As tickets, statements, receipts or guarantee documents in the manner described to remove. For example, fraudsters have already frequently deleted, for example, the imprint of used tickets and used them again and abusively (eg. Report by Spiegel Online of January 11, 2007 ).

Die derzeit gebräuchlichen Dokumente auf der Basis üblicher Thermopapiere sind gegen betrügerische Veränderungen ungeschützt. Der Deutschen Bahn sind entsprechende Manipulationen bekannt ( Bericht von Spiegel Online vom 11. Januar 2007 ). Geplant ist daher die Umrüstung der Fahrkarten- und Fahrplan-Automaten derart, dass beispielsweise Fahrpläne nicht mehr auf demselben Papiertyp ausgedruckt werden, wie entsprechende Fahrscheine. Allein dadurch entstehen jedoch hohe Kosten, ohne dass dem eigentlichen Problem, nämlich der Manipulierbarkeit der Fahrscheine, wirksam begegnet wird. Die Thermoschicht der derzeit gebräuchlichsten Thermopapiere enthält einen Leukofarbstoff (meist ein Fluoranderivat), welcher in alkalischem bis neutralem Milieu farblos ist, und der durch Reaktion mit einer Säure, die ebenfalls in der Thermoschicht in Form eines sauren Farbentwicklers z. B. Bisphenol A, Bentonit oder Octadecylphosphorsäure eingebettet ist, zu einer intensiven Schwarzfärbung reagiert. Die zur Manipulation geeigneten Lösungsmittelzubereitungen reagieren alkalisch. Sie überführen den bei der gebrauchsgemäßen Anwendung aus dem Leukofarbstoff entstandenen Farbstoff in ein ungefärbtes Derivat.The currently used documents based on conventional thermal papers are unprotected against fraudulent changes. Deutsche Bahn is aware of such manipulations ( Report by Spiegel Online of January 11, 2007 ). Therefore, the conversion of the ticket and timetable machines is planned such that, for example, timetables are no longer printed on the same type of paper as corresponding tickets. However, this alone causes high costs, without the actual problem, namely the manipulability of the tickets, is effectively countered. The thermal layer of currently most common thermal papers contains a leuco dye (usually a fluoran derivative), which is colorless in an alkaline to neutral environment, and by reaction with an acid, which is also in the thermal layer in the form of an acidic color developer z. As bisphenol A, bentonite or octadecyl phosphoric acid is reacted to an intense black color. The solvent preparations suitable for manipulation react alkaline. They convert the resulting from the leuco dye in the intended use of the dye into an undyed derivative.

Die hier offenbarte Erfindung beschreibt ein Verfahren, das geeignet ist, die beschriebene Art der Manipulation von Produkten und Dokumenten auf der Basis von Thermopapier zu unterbinden.The The invention disclosed herein describes a method that is suitable is the described way of manipulating products and documents on the basis of thermal paper to prevent.

Ihr liegt der Einsatz von Substanzen zugrunde, die in ihrer erfindungsgemäßen Wirkungsweise dem in der Thermoschicht eingebetteten Farbentwickler entsprechen, und die beim Manipulationsversuch mit der Lösungsmittelzubereitung zusammen mit dem Farbbildner (z. B. Leukofarbstoff) gelöst werden. Dadurch kommt es nicht nur zur oberflächlichen Ausbildung der entsprechenden Färbung, sondern auch zur Diffusion der manipulationsverhindernden Substanzen zusammen mit dem Farbbildner in das Basispapier. Damit reagieren die Komponenten auch innerhalb des Basispapiers, sodass dieses im gesamten Volumen intensiv verfärbt und der Manipulationsversuch irreversibel angezeigt wird.you is based on the use of substances that in their inventive Mode of action of the color developer embedded in the thermal layer and the manipulation attempt with the solvent preparation dissolved together with the color former (eg leuco dye) become. This is not just a superficial education the corresponding coloring, but also to diffusion the tamper-evident substances together with the color former in the base paper. The components also react within of the base paper, so that it discolored intensively throughout the volume and the manipulation attempt is displayed irreversibly.

Es ist darauf zu achten, dass die erfindungsgemäßen Schutzkomponenten wasserunlöslich sind, damit die Farbreaktion nicht durch Feuchtigkeit wie z. B. Wasser oder Handfeuchte gestartet wird.It Care must be taken that the invention Protective components are water insoluble, hence the color reaction not by moisture such. As water or hand moisture started becomes.

Die Komponenten werden in das Papier oder vorzugsweise zwischen Basispapier und Thermoschicht bzw. unmittelbar in oder unter eine Zwischenschicht (gemäß 1) eingearbeitet, und zwar derart, dass diese nicht direkt mit dem Farbbildner (z. B. Leukofarbstoff) in Kontakt treten können, da dies zu einer sofortigen Verfärbung führen würde.The components are incorporated in the paper or preferably between base paper and thermo-layer or directly in or under an intermediate layer (according to US Pat 1 ) in such a way that they can not come into direct contact with the color former (eg leuco dye) as this would lead to an immediate discoloration.

Diese Erfindung und deren Ansprüche beschränken sich nicht auf die im nachfolgenden Beispiel genannten Reagenzien.These Invention and its claims are limited not on the reagents mentioned in the following example.

Beispiel:Example:

Als erfindungsgemäße saure Komponenten kommen organische Säuren geeigneter Acidität und Löslichkeit in organischen Lösungsmitteln zum Einsatz. Geeignet sind aliphatische, alicyclische und aromatische Carbonsäuren, Sulfonsäuren, Phosphonsäuren oder Lewissäuren. Einige, aber nicht erschöpfend aufgeführte Beispiele sind: Benzoesäure bzw. deren Abkömmlinge, wie Salicylsäure oder Gallussäuren oder Lewissäuren.When Acetic components according to the invention come organic Acids of suitable acidity and solubility used in organic solvents. Are suitable aliphatic, alicyclic and aromatic carboxylic acids, Sulfonic acids, phosphonic acids or Lewis acids. Some, but not exhaustive, examples are: benzoic acid or its derivatives, such as Salicylic acid or gallic acids or Lewis acids.

ZITATE ENTHALTEN IN DER BESCHREIBUNGQUOTES INCLUDE IN THE DESCRIPTION

Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Zitierte Nicht-PatentliteraturCited non-patent literature

  • - Bericht von Spiegel Online vom 11. Januar 2007 [0003] - Spiegel Online report of January 11, 2007 [0003]
  • - Bericht von Spiegel Online vom 11. Januar 2007 [0004] - Spiegel Online report of January 11, 2007 [0004]

Claims (12)

Konzeption für die Herstellung von Thermopapier, dadurch gekennzeichnet, dass zusätzlich zur Thermoschicht eine weitere Schicht auf- bzw. eingebracht wird, die organisch lösliche Komponenten enthält, welche Farbbildner, die in verschiedenen Schichten des Thermopapiers eingebettet sind, zur Färbung bringen können.Concept for the production of thermal paper, characterized in that in addition to the thermal layer, a further layer is applied or incorporated, which contains organic soluble components which color formers, which are embedded in different layers of the thermal paper, can bring to the coloration. Konzeption nach Anspruch 1, dadurch gekennzeichnet, dass bei einem sauren Farbentwickler der Thermoschicht eine erfindungsgemäße zusätzliche saure Komponente in die Zusatzschicht eingearbeitet wird.Concept according to claim 1, characterized in the case of an acidic color developer of the thermal layer, an inventive additional acidic component incorporated into the additional layer becomes. Konzeption nach Anspruch 1, dadurch gekennzeichnet, dass bei einem alkalischen Farbentwickler der Thermoschicht eine erfindungsgemäße zusätzliche alkalische Komponente in die Zusatzschicht eingearbeitet wird.Concept according to claim 1, characterized in the case of an alkaline color developer, the thermo layer has a additional alkaline according to the invention Component is incorporated in the additional layer. Konzeption nach Anspruch 1, dadurch gekennzeichnet, dass die zusätzliche erfindungsgemäße Komponente universell in gebräuchlichen organischen Lösungsmitteln löslich ist.Concept according to claim 1, characterized that the additional inventive Component universal in common organic solvents is soluble. Konzeption nach Anspruch 1, dadurch gekennzeichnet, dass der Farbbildner ein Leukofarbstoff ist.Concept according to claim 1, characterized that the color former is a leuco dye. Konzeption nach Anspruch 1, dadurch gekennzeichnet, dass die zusätzliche erfindungsgemäße Komponente ins Basispapier eingearbeitet ist.Concept according to claim 1, characterized that the additional inventive Component is incorporated in the base paper. Konzeption nach Anspruch 1, dadurch gekennzeichnet, dass die zusätzliche erfindungsgemäße Komponente in eine Zwischenschicht zwischen Thermoschicht und Basispapier eingearbeitet ist.Concept according to claim 1, characterized that the additional inventive Component in an intermediate layer between thermo-layer and base paper is incorporated. Konzeption nach Anspruch 1, dadurch gekennzeichnet, dass die zusätzliche erfindungsgemäße Komponente in eine Deckschicht über der Thermoschicht eingearbeitet ist.Concept according to claim 1, characterized that the additional inventive Component incorporated in a cover layer over the thermal layer is. Konzeption nach Anspruch 1, dadurch gekennzeichnet, dass die zusätzliche erfindungsgemäße Komponente in den gleichen Lösungsmitteln löslich ist wie der Farbbildner.Concept according to claim 1, characterized that the additional inventive Component soluble in the same solvents is like the color former. Konzeption nach Anspruch 1, dadurch gekennzeichnet, dass die eingebrachten Materialien zum Schutz vor der Manipulation von Dokumenten wie Fahrscheinen durch organische Lösungsmittel oder Lösungsmittelzubereitungen, eingesetzt werden.Concept according to claim 1, characterized that the materials introduced to protect against manipulation of documents such as tickets through organic solvents or Solvent preparations are used. Konzeption nach Anspruch 1, dadurch gekennzeichnet, dass die eingebrachten Materialien als unsichtbare Marker eingesetzt werden, um Originalprodukte von Fälschungen zu unterscheiden.Concept according to claim 1, characterized that the inserted materials used as invisible markers to distinguish original products from counterfeits. Konzeption nach Anspruch 1, dadurch gekennzeichnet, dass die eingebrachten Materialien mit den Farbbildnern, vorzugsweise Leukofarbstoffen, nach Behandlung des Thermopapiers mit organischen Lösungsmitteln optisch irreversibel erkennbar gemacht werden.Concept according to claim 1, characterized that the introduced materials with the color formers, preferably Leuco dyes, after treatment of thermal paper with organic Solvents are made visually irreversible.
DE200710006059 2007-02-02 2007-02-02 Design for producing thermal paper, has layer, which is applied to thermal layer, where acid component is introduced into auxiliary layer with acid color developer of thermal layer Withdrawn DE102007006059A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE200710006059 DE102007006059A1 (en) 2007-02-02 2007-02-02 Design for producing thermal paper, has layer, which is applied to thermal layer, where acid component is introduced into auxiliary layer with acid color developer of thermal layer

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Application Number Priority Date Filing Date Title
DE200710006059 DE102007006059A1 (en) 2007-02-02 2007-02-02 Design for producing thermal paper, has layer, which is applied to thermal layer, where acid component is introduced into auxiliary layer with acid color developer of thermal layer

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DE102007006059A1 true DE102007006059A1 (en) 2008-08-07

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010119089A1 (en) * 2009-04-15 2010-10-21 Sension Biologische Detektions- Und Schnelltestsysteme Gmbh Heat-sensitive recording material having a security feature

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4725497A (en) * 1985-01-21 1988-02-16 Societe Anonyme: Aussedat-Rey Unfalsifiable safety paper
US5209515A (en) * 1991-02-08 1993-05-11 The Standard Register Company Solvent and/or pressure sensitive security document
DE4331260C2 (en) * 1993-09-15 1995-10-05 Renker Gmbh & Co Kg Heat-sensitive recording material with a recognition layer on the back
US5912205A (en) * 1997-01-30 1999-06-15 The Standard Register Company Heat resistant security document
DE19842867C2 (en) * 1998-09-19 2000-08-03 Mitsubishi Hitec Paper Flensbu Heat-sensitive recording material and a method for checking authenticity

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4725497A (en) * 1985-01-21 1988-02-16 Societe Anonyme: Aussedat-Rey Unfalsifiable safety paper
US5209515A (en) * 1991-02-08 1993-05-11 The Standard Register Company Solvent and/or pressure sensitive security document
DE4331260C2 (en) * 1993-09-15 1995-10-05 Renker Gmbh & Co Kg Heat-sensitive recording material with a recognition layer on the back
US5912205A (en) * 1997-01-30 1999-06-15 The Standard Register Company Heat resistant security document
DE19842867C2 (en) * 1998-09-19 2000-08-03 Mitsubishi Hitec Paper Flensbu Heat-sensitive recording material and a method for checking authenticity

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Bericht von Spiegel Online vom 11. Januar 2007

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010119089A1 (en) * 2009-04-15 2010-10-21 Sension Biologische Detektions- Und Schnelltestsysteme Gmbh Heat-sensitive recording material having a security feature

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