EP0611664B1 - Webbed recording material - Google Patents

Webbed recording material Download PDF

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Publication number
EP0611664B1
EP0611664B1 EP94100255A EP94100255A EP0611664B1 EP 0611664 B1 EP0611664 B1 EP 0611664B1 EP 94100255 A EP94100255 A EP 94100255A EP 94100255 A EP94100255 A EP 94100255A EP 0611664 B1 EP0611664 B1 EP 0611664B1
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EP
European Patent Office
Prior art keywords
paper
web
recording material
shaped recording
material according
Prior art date
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Expired - Lifetime
Application number
EP94100255A
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German (de)
French (fr)
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EP0611664A1 (en
Inventor
Yukio Takayama
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.)
Kanzan Spezialpapiere GmbH
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Kanzan Spezialpapiere GmbH
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    • 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
    • B41M3/10—Watermarks
    • 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

Definitions

  • the invention relates to a web-shaped recording material according to claim 1.
  • thermo paper When transmitting, for example, long-distance copies via the public telephone network by the so-called fax method, the thermal recording method is used to an ever greater extent for the reproduction of the received long-distance copies.
  • a recording material called thermal paper which consists of a support with a coating of a thin, heat-sensitive layer. This layer contains two components that react with each other when exposed to heat.
  • Heat-sensitive recording materials of the type mentioned with a heat-sensitive recording layer applied to the surface of a carrier material have long been known, for example, for use in thermal fast printers. Paper, and in some cases also plastic film or composite, is usually used as the carrier material for receiving the heat-sensitive recording layer.
  • a particularly important criterion for thermosensitive paper is high surface smoothness.
  • This is produced mechanically, for example, by leading a paper that has been moistened to a certain extent through calendering calenders and thereby smoothing the surface to a high level.
  • the paper between the rollers is satinized under pneumatically or hydraulically generated high pressure.
  • the recording layer is generally made pure white.
  • the base material preferably a coating base paper, made from high-quality cellulose, is usually of a neutral white color. For this reason, quality characterization, for example, is neither possible for the manufacturer nor for the user, or cannot be carried out in a really satisfactory manner.
  • thermosensitive web material a method and a device for applying a marking to a thermosensitive web material is known and is referred to as a "pseudo watermark".
  • the method consists in that heat is applied to part of the thermosensitive surface of the paper, and the paper is thereby "semi-translucent", that is to say semi-translucent.
  • a polyethylene polymer is proposed as the heat-sensitive material.
  • the paper is placed discontinuously on an embossing stick or plate and, in the process, applied with a contact pressure of a predetermined force.
  • the known method disadvantageously leads to a considerable expenditure of time in production, as a result of which the production costs are considerably burdened.
  • the invention has for its object to incorporate a recognizable sign for quality characterization on thermal paper, which avoids the aforementioned difficulties and disadvantages and, if suitable for a quick, inexpensive and safe production, results in a clearly recognizable quality characterization sign without the optical contrasts of the thermal writing to be applied affect.
  • the invention proposes in the case of a web-shaped carrier material of the type mentioned at the outset that at least one watermark is formed in the carrier material.
  • a watermark is understood to mean a sign introduced by a structural change in a web-like material such as paper, which is visible when viewed in transmitted light. Such watermarks are created during the production of the web-shaped material, for example on the wire of the paper machine, by pressing a relief or hollow shape into the wet nonwoven fabric.
  • a high surface smoothness normally precludes the incorporation of a visible watermark, particularly in the case of comparatively thin or lightweight carrier material.
  • a heat-sensitive recording material according to claim 1 is specified for the first time, the support of which consists of a paper with watermarks.
  • the watermark incorporated into the backing paper can be given any shape in the design, for example simple lines, geometric shapes, names or symbols that characterize quality.
  • the water sifting can be incorporated with the known technologies on the paper machine screen, for example with the help of an erichu rs, a molette or as an artificial watermark in the form of an embossing. Further expedient training courses are provided in accordance with the subclaims.
  • the figure shows a web-shaped carrier material (1) for a thermosensitive recording layer with a surface of high smoothness or extremely low roughness, which has a coating with colorless reactants such as dye precursors which cause a color change reaction under the action of heat.
  • At least one watermark (2) is formed in the carrier material (1). It can be a character that is suitable as a recognition index, for example with the first letters of a company (2a), but it can also be a pure symbol character (2b).
  • the carrier material (1) is a machine-smoothed printing paper with a well-closed surface.
  • the paper has a mass per unit area of 40-250 g per m 2 , preferably 50-150 g / m 2 .
  • the paper may occasionally be of high whiteness or of comparatively less Be white and have a coloration that only slightly affects the shining through of light.
  • Such a web-shaped carrier material (1) is usually made from bleached, semi-bleached or unbleached cellulose. But it can also be made from waste paper.
  • the sheet-like carrier material (1) preferably has a surface smoothness which is 50-250 s in accordance with DIN 53 107 Gl (Bekk) A.
  • the color of the backing paper can be chosen regardless of the watermark. It is preferably neutral pure white, but can also have a lower whiteness when using waste paper.
  • carrier papers in the sense of the invention can also be used which are made from pulp containing wood pulp, semi-bleached or unbleached cellulose.

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Heat Sensitive Colour Forming Recording (AREA)
  • Laminated Bodies (AREA)
  • Paper (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)

Abstract

A support (carrier, substrate) material in the form of a web for a thermosensitive recording layer having a surface of high smoothness or extremely low roughness and carrying a coating containing colourless reactants, such as dye precursors, which cause a colour-change reaction on exposure to heat, contains at least one watermark (2) in the support material (1).

Description

Die Erfindung betrifft ein bahnförmiges Aufzeichnungsmaterial nach Anspruch 1.The invention relates to a web-shaped recording material according to claim 1.

Bei der Übermittlung beispielsweise von Fernkopien über das öffentliche Fernsprechnetz durch das sogenannte Telefax-Verfahren wird für die Wiedergabe der empfangenen Fernkopien in immer stärkerem Maße das thermische Aufzeichnungsverfahren verwendet. Hierfür wird ein als Thermopapier bezeichnetes Aufzeichnungsmaterial eingesetzt, welches aus einem Träger mit einem Überzug einer dünnen, hitzeempfindlichen Schicht besteht. Diese Schicht enthält zwei Komponenten, die unter Hitzeeinwirkung miteinander reagieren. Wärmeempfindliche Aufzeichnungsmaterialien der genannten Art mit einer auf der Oberfläche eines Trägermaterials aufgebrachten wärmeempfindlichen Aufzeichnungsschicht sind seit langem beispielsweise auch zur Verwendung für thermische Schnelldrucker bekannt. Als Trägermaterial zur Aufnahme der wärmeempfindlichen Aufzeichnungsschicht wird üblicherweise Papier, fallweise auch Kunststoffolie oder auch Verbundstoff verwendet. Ein besonders wichtiges Kriterium für thermosensitives Papier ist eine hohe Oberflächenglätte. Diese wird maschinell z.B. dadurch hergestellt, daß ein in bestimmtem Maße befeuchtetes Papier durch Satinierkalander geführt und dabei die Oberfläche zu einer hohen Glätte vergleichmäßigt wird. Dabei wird das Papier zwischen den Walzen unter pneumatisch oder hydraulisch erzeugtem hohen Druck satiniert.When transmitting, for example, long-distance copies via the public telephone network by the so-called fax method, the thermal recording method is used to an ever greater extent for the reproduction of the received long-distance copies. For this purpose, a recording material called thermal paper is used, which consists of a support with a coating of a thin, heat-sensitive layer. This layer contains two components that react with each other when exposed to heat. Heat-sensitive recording materials of the type mentioned with a heat-sensitive recording layer applied to the surface of a carrier material have long been known, for example, for use in thermal fast printers. Paper, and in some cases also plastic film or composite, is usually used as the carrier material for receiving the heat-sensitive recording layer. A particularly important criterion for thermosensitive paper is high surface smoothness. This is produced mechanically, for example, by leading a paper that has been moistened to a certain extent through calendering calenders and thereby smoothing the surface to a high level. The paper between the rollers is satinized under pneumatically or hydraulically generated high pressure.

Zur Erzielung eines ausreichenden Kontrastes zwischen der Aufzeichnungsschicht und der beim Aufzeichnen entwickelten Farbe (Schwärzung) wird die Aufzeichnungsschicht in der Regel reinweiß gestaltet. Auch das Trägermaterial, bevorzugt ein Streichrohpapier, aus hochwertigen Zellstoffen hergestellt, ist üblicherweise von neutral weißer Farbe. Aus diesem Grunde ist beispielsweise eine Qualitätscharakterisierung sowohl für den Hersteller als auch für den Anwender nicht möglich bzw. nicht in wirklich befriedigender Weise durchführbar.In order to achieve a sufficient contrast between the recording layer and the color (blackening) developed during recording, the recording layer is generally made pure white. The base material, preferably a coating base paper, made from high-quality cellulose, is usually of a neutral white color. For this reason, quality characterization, for example, is neither possible for the manufacturer nor for the user, or cannot be carried out in a really satisfactory manner.

Aus der EP O 203 499 A2 ist ein Verfahren und eine Vorrichtung zur Anbringung einer Markierung an einem thermosensitiven Bahnmaterial bekannt und wird als "Pseudo Watermark" bezeichnet. Das Verfahren besteht darin, daß auf einen Teil der thermosensitiven Oberfläche des Papieres Wärme aufgebracht wird, und das Papier dadurch "semi-translucent", d.h. halb durchscheinend präpariert wird. Als wärmeempfindliches Material wird ein Polyethylenpolymer vorgeschlagen. Zum Aufbringen der erforderlichen Wärme wird das Papier diskontinuierlich an einen Prägestock oder Platte angelegt und dabei mit einem Anpreßdruck von vorbestimmter Kraft beaufschlagt. Das bekannte Verfahren führt nachteilig zu einem erheblichen Zeitaufwand bei der Produktion, wodurch die Herstellungskosten erheblich belastet werden. Darüber hinaus ist es sehr schwierig, die Einwirkungszeit und die Einwirkungstemperatur sowie den Einwirkungsdruck derart aufeinander abzustimmen und in den Produktionsablauf zu integrieren, daß in Anbetracht weiterer Betriebsparameter wie Dicke und Feuchtigkeit des Bahnmaterials eine vorbestimmte Farbschattierung des Pseudo-Wasserzeichens nicht über- oder unterschritten wird.From EP O 203 499 A2 a method and a device for applying a marking to a thermosensitive web material is known and is referred to as a "pseudo watermark". The method consists in that heat is applied to part of the thermosensitive surface of the paper, and the paper is thereby "semi-translucent", that is to say semi-translucent. A polyethylene polymer is proposed as the heat-sensitive material. In order to apply the required heat, the paper is placed discontinuously on an embossing stick or plate and, in the process, applied with a contact pressure of a predetermined force. The known method disadvantageously leads to a considerable expenditure of time in production, as a result of which the production costs are considerably burdened. In addition, it is very difficult to coordinate the exposure time and the exposure temperature as well as the exposure pressure in such a way and to integrate them into the production process that, given other operating parameters such as the thickness and moisture of the web material, a predetermined color shade of the pseudo-watermark is not exceeded or undershot.

Der Erfindung liegt die Aufgabe zugrunde, auf einem Thermopapier ein erkennbares Zeichen für eine Qualitätscharakterisierung einzuarbeiten, welches die vorgenannten Schwierigkeiten und Nachteile vermeidet und bei Eignung für eine zügige, kostengünstige und sichere Herstellung ein deutlich erkennbares Qualitätscharakterisierungszeichen ergibt, ohne die optischen Kontraste der aufzubringenden Thermoschrift zu beeinträchtigen.The invention has for its object to incorporate a recognizable sign for quality characterization on thermal paper, which avoids the aforementioned difficulties and disadvantages and, if suitable for a quick, inexpensive and safe production, results in a clearly recognizable quality characterization sign without the optical contrasts of the thermal writing to be applied affect.

Zur Lösung der vorgenannten Aufgabe wird mit der Erfindung bei einem bahnförmigen Trägermaterial der eingangs genannnten Art vorgeschlagen, daß im Trägermaterial wenigstens ein Wasserzeichen ausgebildet ist.
Unter einem Wasserzeichen wird ein durch strukturelle Änderung in eine bahnförmiges Material wie Papier eingebrachtes Zeichen verstanden, welches beim Betrachten in durchfallendem Licht sichtbar wird. Derartige Wasserzeichen entstehen bei der Herstellung des bahnförmigen Materials beispielsweise auf dem Sieb der Papiermaschine durch Eindrücken einer Relief- oder Hohlform in den nassen Faservlies. Normalerweise schließt eine hohe Oberflächenglätte insbesondere bei vergleichsweise dünnem bzw. leichtgewichtigem Trägermaterial die Einarbeitung eins sichtbaren Wasserzeichens aus.
Es war daher überraschend, daß entgegen der Erwartung und auch im Hinblick auf die im Anschluß an die Herstellung des bahnförmigen Trägermaterials erfolgende Beschichtung ein in diesem hergestelltes Wasserzeichen bei Betrachtung im durchscheinenden Licht klar zur Qualitätscharakterisierung erkennbar war.
Weil die Herstellung des Wasserzeichens im Trägermaterial bei fortlaufend wirtschaftlicher Herstellung desselben nach bekannten Verfahren ohne höheren Kostenaufwand möglich ist, können nunmehr unterschiedliche Thermopapiersorten nach der Erfindung mit dem Identitätskennzeichen in Form von Wasserzeichen ausgerüstet werden.To achieve the above-mentioned object, the invention proposes in the case of a web-shaped carrier material of the type mentioned at the outset that at least one watermark is formed in the carrier material.
A watermark is understood to mean a sign introduced by a structural change in a web-like material such as paper, which is visible when viewed in transmitted light. Such watermarks are created during the production of the web-shaped material, for example on the wire of the paper machine, by pressing a relief or hollow shape into the wet nonwoven fabric. A high surface smoothness normally precludes the incorporation of a visible watermark, particularly in the case of comparatively thin or lightweight carrier material.
It was therefore surprising that, contrary to expectation and also with regard to the coating that followed the production of the web-shaped carrier material, a watermark produced in it was clearly recognizable for quality characterization when viewed in the translucent light.
Because the production of the watermark in the carrier material is possible with the continuous economical production of the same by known methods without higher costs, different types of thermal paper according to the invention can now be equipped with the identity mark in the form of a watermark.

Dadurch erhält der Anwender mit Vorteil die Möglichkeit, unterschiedliche Qualitäten solcher Thermopapiere zu erkennen und, wie es in der Wirtschaft üblich ist, Preis und Leistung der jeweiligen Thermopapiersorten gezielt auszuwählen. Mit der Erfindung wird erstmals ein wärmeempfindliches Aufzeichnungsmaterial nach Anspruch 1 angegeben, dessen Träger aus einem Papier mit Wasserzeichen besteht. Dem in das Trägerpapier eingearbeiteten Wasserzeichen können dabei in der Gestaltung beliebige Formen gegeben werden, zum Beispiel einfache Linien, geometrische Formen, Namenszüge oder auch qualitätskennzeichnende Symbole.
Das Wasserseichen kann mit den bekannten Technologien auf dem Papiermaschinensieb beispielsweise mit Hilfe eines Egoutteu rs, einer Molette oder auch als künstliches Wasserzeichen in Form einer Prägung eingearbeitet werden.
Weitere zweckmäßige Ausbildungen sind entsprechend den Unteransprüchen vorgesehen.This gives the user the advantage of being able to recognize different qualities of such thermal paper and, as is customary in the economy, to select the price and performance of the respective thermal paper in a targeted manner. With the invention, a heat-sensitive recording material according to claim 1 is specified for the first time, the support of which consists of a paper with watermarks. The watermark incorporated into the backing paper can be given any shape in the design, for example simple lines, geometric shapes, names or symbols that characterize quality.
The water sifting can be incorporated with the known technologies on the paper machine screen, for example with the help of an egoutteu rs, a molette or as an artificial watermark in the form of an embossing.
Further expedient training courses are provided in accordance with the subclaims.

In der Zeichnung ist ein Ausführungsbeispiel dargestellt, welches rein schematisch den Erfindungsgegenstand zeigt. Die Figur zeigt ein bahnförmiges Trägermaterial (1) für eine thermosensitive Aufzeichnungsschicht mit einer Oberfläche von hoher Glätte bzw. extrem geringer Rauhigkeit, welche eine Beschichtung mit unter Wärmeeinwirkung eine Farbänderungsreaktion hervorrufenden farblosen Reaktanden wie Farbstoffvorläufern aufweist. Im Trägermaterial (1) ist dabei wenigstens ein Wasserzeichen (2) ausgebildet. Es kann sich dabei um ein als Erkennungsindiz geeignetes Zeichen beispielsweise mit Anfangsbuchstaben einer Firma (2a) handeln, es kann aber auch ein reines Symbolzeichen (2b) sein. Das Trägermaterial (1) ist eine maschinengeglättetes Druckpapier mit einer gut geschlossenen Oberfläche. Es weist eine flächenbezogene Massen von 40-250 g pro m2, bevorzugt 50-150 g/m2 auf. Dabei kann das Papier fallweise von hoher Weiße oder von vergleichsweise geringerer Weiße sein und eine das Durchscheinen von Licht nur unwesentlich beeinträchtigende Färbung besitzen. Üblicherweise ist ein solches bahnförmiges Trägermaterial (1) aus gebleichtem, halbgebleichtem oder ungebleichtem Zellstoff hergestellt. Es kann aber auch aus Altpapier hergestellt sein. Vorzugweise besitzt das bahnförmige Trägermaterial (1) eine Oberflächenglätte, die nach DIN 53 107 Gl (Bekk)A 50-250 s beträgt. Die Farbe der Trägerpapiere kann unabhängig vom Wasserzeichen gewählt werden. Sie beträgt bevorzugt neutral Reinweiß, kann aber auch bei Verwendung von Altpapier einen geringeren Weißgrad aufweisen. Es können aber auch Trägerpapiere im Sinne der Erfindung zum Einsatz kommen, welche aus holzschliffhaltigen Zellstoffen, halb- oder ungebleichten Zellstoffen hergestellt sind.In the drawing, an embodiment is shown, which shows the subject matter of the invention purely schematically. The figure shows a web-shaped carrier material (1) for a thermosensitive recording layer with a surface of high smoothness or extremely low roughness, which has a coating with colorless reactants such as dye precursors which cause a color change reaction under the action of heat. At least one watermark (2) is formed in the carrier material (1). It can be a character that is suitable as a recognition index, for example with the first letters of a company (2a), but it can also be a pure symbol character (2b). The carrier material (1) is a machine-smoothed printing paper with a well-closed surface. It has a mass per unit area of 40-250 g per m 2 , preferably 50-150 g / m 2 . The paper may occasionally be of high whiteness or of comparatively less Be white and have a coloration that only slightly affects the shining through of light. Such a web-shaped carrier material (1) is usually made from bleached, semi-bleached or unbleached cellulose. But it can also be made from waste paper. The sheet-like carrier material (1) preferably has a surface smoothness which is 50-250 s in accordance with DIN 53 107 Gl (Bekk) A. The color of the backing paper can be chosen regardless of the watermark. It is preferably neutral pure white, but can also have a lower whiteness when using waste paper. However, carrier papers in the sense of the invention can also be used which are made from pulp containing wood pulp, semi-bleached or unbleached cellulose.

Claims (7)

  1. Web-shaped recording material comprising a carrier (1) of paper, which carrier exhibits a marking and is provided with a coating of a colourless colour precursor compound which reacts under action of heat, characterised in that said marking is a water mark (2) which can be applied below the coating in the carrier (1) and which is designed to serve as a sign of quality.
  2. Web-shaped recording material according to claim 1, characterised in that the carrier (1) is a machine-finished paper having a well-closed surface.
  3. Web-shaped recording material according to claim 1, characterised in that the paper has an area-related mass of 40 - 250 g/m2, preferably 50 - 150 g/m2.
  4. Web-shaped recording material according to one or more of claims 1 to 3, characterised in that, from case to case, the paper is of intense whiteness or of comparatively less intense whiteness, and is of a colour only insignificantly impairing the transmission of light.
  5. Web-shaped recording material according to one or more of claims 1 - 4, characterised in that the paper is made of bleached, semibleached or unbleached pulp.
  6. Web-shaped recording material according to one or more of claims 1 - 5, characterised in that the paper is manufactured of waste paper.
  7. Web-shaped recording material according to any one of the preceding claims, characterised in that the surface smoothness of the paper is 50 - 250 s, according to DIN 53 107, Gl (Bekk)A.
EP94100255A 1993-02-13 1994-01-10 Webbed recording material Expired - Lifetime EP0611664B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4304413 1993-02-13
DE4304413A DE4304413A1 (en) 1993-02-13 1993-02-13 Web-like carrier material for a thermosensitive recording layer

Publications (2)

Publication Number Publication Date
EP0611664A1 EP0611664A1 (en) 1994-08-24
EP0611664B1 true EP0611664B1 (en) 1997-10-22

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ID=6480417

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EP94100255A Expired - Lifetime EP0611664B1 (en) 1993-02-13 1994-01-10 Webbed recording material

Country Status (6)

Country Link
EP (1) EP0611664B1 (en)
AT (1) ATE159463T1 (en)
DE (2) DE4304413A1 (en)
DK (1) DK0611664T3 (en)
ES (1) ES2110126T3 (en)
GR (1) GR3025605T3 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10021896A1 (en) * 2000-05-05 2001-11-15 Mitsubishi Hitec Paper Flensbu Recording material (eg of ink-jet, heat-sensitive or self-coloring type) for production of security documents has intermediate layer with embossed markings to serve as a security feature
WO2003033272A1 (en) 2001-10-16 2003-04-24 Mitsubishi Hitec Paper Flensburg Gmbh Translucent web-type recording material and a method for producing the same
EP1925459A2 (en) 2006-11-24 2008-05-28 Mitsubishi Hitec Paper Flensburg GmbH Heat-sensitive recording material with authentification feature

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE656943A (en) * 1960-12-27
ATE9561T1 (en) * 1979-10-22 1984-10-15 The Wiggins Teape Group Limited SHEET MATERIAL CARRIAGED WITH AN INDEPENDENT IMAGE AND PROCESS FOR ITS PRODUCTION.
ATE68139T1 (en) * 1985-05-28 1991-10-15 Belmarque Systems Sa METHOD AND APPARATUS FOR PAPER MARKING AND PAPER USABLE FOR THIS METHOD.
DE4037299C1 (en) * 1990-11-23 1991-12-19 Renker Gmbh & Co Kg, 5160 Dueren, De Heat sensitive recording material - has recording layer contg. colourless dye precursor and acid cpd., applied on recycled paper having specific fibre content
DE9302105U1 (en) * 1993-02-13 1993-04-08 Kanzan Spezialpapiere GmbH, 5160 Düren Web-shaped carrier material for a thermosensitive recording layer

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10021896A1 (en) * 2000-05-05 2001-11-15 Mitsubishi Hitec Paper Flensbu Recording material (eg of ink-jet, heat-sensitive or self-coloring type) for production of security documents has intermediate layer with embossed markings to serve as a security feature
DE10021896C2 (en) * 2000-05-05 2002-04-25 Mitsubishi Hitec Paper Flensbu Translucent sheet-like recording material and process for its production
WO2003033272A1 (en) 2001-10-16 2003-04-24 Mitsubishi Hitec Paper Flensburg Gmbh Translucent web-type recording material and a method for producing the same
US6995117B2 (en) 2001-10-16 2006-02-07 Mitsubishi Hitec Paper Flensburg Gmbh Translucent web-type recording material and a method for producing the same
EP1925459A2 (en) 2006-11-24 2008-05-28 Mitsubishi Hitec Paper Flensburg GmbH Heat-sensitive recording material with authentification feature

Also Published As

Publication number Publication date
DK0611664T3 (en) 1998-05-18
ATE159463T1 (en) 1997-11-15
GR3025605T3 (en) 1998-03-31
DE59404373D1 (en) 1997-11-27
DE4304413A1 (en) 1994-08-18
ES2110126T3 (en) 1998-02-01
EP0611664A1 (en) 1994-08-24

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