EP1089882A2 - Procede pour marquer des papiers et des cartons - Google Patents

Procede pour marquer des papiers et des cartons

Info

Publication number
EP1089882A2
EP1089882A2 EP99924958A EP99924958A EP1089882A2 EP 1089882 A2 EP1089882 A2 EP 1089882A2 EP 99924958 A EP99924958 A EP 99924958A EP 99924958 A EP99924958 A EP 99924958A EP 1089882 A2 EP1089882 A2 EP 1089882A2
Authority
EP
European Patent Office
Prior art keywords
coating
laser energy
treated
printing
paper
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.)
Granted
Application number
EP99924958A
Other languages
German (de)
English (en)
Other versions
EP1089882B1 (fr
Inventor
Viktor Uerlings
Arnold Gillner
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.)
Zanders Feinpapiere AG
Original Assignee
Zanders Feinpapiere AG
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 Zanders Feinpapiere AG filed Critical Zanders Feinpapiere AG
Publication of EP1089882A2 publication Critical patent/EP1089882A2/fr
Application granted granted Critical
Publication of EP1089882B1 publication Critical patent/EP1089882B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
    • D21H25/04—Physical treatment, e.g. heating, irradiating
    • D21H25/06—Physical treatment, e.g. heating, irradiating of impregnated or coated paper
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/44—Watermarking devices
    • 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
    • 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
    • D21H19/02—Metal coatings
    • D21H19/08—Metal coatings applied as vapour, e.g. in vacuum
    • 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
    • D21H19/82—Paper comprising more than one coating superposed

Definitions

  • the invention relates to a method for producing a permanent marking in the uppermost coating of paper substrates and the paper products, such as paper and cardboard, obtainable with this method and having a marking in the uppermost layer.
  • DE-A-34 25 086 describes a method for marking prints by applying a special form of energy to the printed sheet / web. Modulated laser light, visible light, infrared light, ultraviolet light or ultrasound is proposed as the form of energy. As a result of this treatment with energy, part of the pressure is removed at the predetermined locations, resulting in the marking on the printing. The method is particularly suitable for creating single copies (unique pieces) of a print.
  • DE-A-37 10 153 describes a paper provided with an image and coated with microcapsules, for example carbonless paper. In the process for producing this paper, the paper substrate is first provided with an image in the form of a watermark with the aid of laser energy.
  • a transparent microcapsule coating is applied to the surface of the paper substrate, which covers the image generated by laser energy but does not darken it.
  • the image therefore remains visible through the dry microcapsule coating of the end product.
  • the illustration should not interfere with subsequent processes, especially the printing or writing on the paper.
  • This object has been achieved by a method for producing a marking in the uppermost coating of paper substrates in that the surface of at least one of the layers arranged below the uppermost coating is treated with laser energy before the top coating is applied, the top coating of the paper substrate being opaque and is selected from at least one printing and / or at least one coating and / or at least one metallization or combinations thereof.
  • the nonwoven substrates which can be used as paper substrate in the process according to the invention and which can optionally be coated before the laser treatment have a mass per unit area (basis weight) of 40, preferably from 60 to 400 g / m 2 , preferably up to 300 g / m 2 .
  • Cardboard which usually has a mass per unit area of at least 150 g / m 2 , preferably at least 170 g / m 2 , is therefore also suitable for the method according to the invention.
  • the terms "paper substrate” or "substrate of the paper product” used interchangeably to describe the invention thus include not only substrates of classic papers, such as writing paper, but also substrates of a surface-related mass corresponding to cardboard boxes.
  • the opacity of the top coat is determined by subtracting the opacity (in percent) of an uncoated paper substrate from the opacity (in percent) of the identical but uncoated paper substrate.
  • the determination of the opacity of the coated and uncoated paper substrates as such is carried out in accordance with DIN 53146. Areas which have not been treated with laser energy are compared.
  • Such printing and / or painting and / or metallization is considered to be an opaque coating in the sense of the invention which, on conventional office paper with a mass per unit area of 80 g / m 2, has an increase in opacity of at least 5 percentage points, preferably of at least 8 percentage points causes.
  • a standard paper substrate for determining the opacity of the top coating (s) a normal writing paper treated with an unpigmented starch coat was used with an opacity (uncoated) of 80-82%.
  • the technical effect brought about by the method according to the invention is particularly surprising since the uppermost coating arranged according to the invention on the layer marked with laser is a non-transparent, i.e. an opaque coating.
  • this uppermost coating consists of at least one printing and / or at least one metallization and / or at least one coating or combinations of these individual coatings, which can also be arranged in a different order.
  • the top coating can be followed by several subsequent coatings on the laser-marked surface of the paper substrate without the perceptibility / visibility of the marking in reflected light on the top layer suffering as a result.
  • at least three-color printing and black as a contrast enhancer are necessary for color printing.
  • An unpigmented, white or colored pigmented line, which can additionally be compressed (satin), can be arranged immediately below the top coating consisting of the printing and / or painting and / or the metallization.
  • the uppermost coating which is arranged on the laser-marked surface and is not transparent as such, can consist of several different individual coatings, for example one Metallization and a painting and / or printing arranged thereon or an unpigmented, white or colored pigmented line, which can additionally have printing or painting.
  • the printing is carried out in particular using offset, gravure and flexographic printing processes, inkjet printing processes and laser printing processes known in the prior art.
  • the metallization of paper substrates can be produced by the methods known in the prior art, for example by direct or transfer methods. Aluminum, copper, gold and silver are particularly suitable for application as a metal layer on paper substrates.
  • the top coating consists of a metallization which is selected from the metals mentioned. This metallization can also be printed and / or painted.
  • Metallizations customary in the context of the invention with one of the metals mentioned above have an average layer thickness of 10 to 50 nm, preferably of 15 to 30 nm and particularly preferably of 15 to 25 nm.
  • Metallizations with a layer thickness of 10 nm on paper with a mass per unit area of 80 g / m 2 and an opacity of 80 - 82% already lead to an increase in opacity of over 8 percentage points compared to unmetallized paper.
  • the coating of paper substrates is also known in the prior art.
  • the coating is white or colored, due to the fact that it comprises appropriate pigments and / or dyes.
  • the procedure is such that a non-woven fabric, a non-woven fabric prepared on the surface, a coated non-woven fabric are used as the paper or cardboard substrate if necessary, can be prepared and / or metallized below the coating, a metallized fiber fleece, which can optionally be prepared and / or coated below the metallization, treated on the surface with laser energy.
  • the process according to the invention can also be carried out without further ado so that the laser energy is allowed to act on the still wet nonwoven fabric during the manufacture of the nonwoven fabric.
  • the nonwoven can be a natural nonwoven.
  • the nonwoven fabric itself can be transparent or opaque, white or colored and can be prepared on the surface for example by an unpigmented or pigmented starch solution.
  • the nonwoven fabric which may be prepared on the surface, can also be coated with an unpigmented, white or colored pigmented line which can be additionally compacted (satinized) and optionally provided with a varnish.
  • a special embodiment of the method according to the invention is characterized in that the surface of a nonwoven fabric is treated with laser energy and at least one further coating is applied to the surface treated with laser energy, which is selected from printing, painting or metallization.
  • a further special embodiment is characterized in that the surface of the nonwoven fabric is treated with laser energy, the surface treated with laser energy is metallized and then a coating and / or coating is applied to the metallized surface.
  • the layer thickness of the metal layer and its production reference is made to the above statements.
  • Aluminum is preferred as the metallization.
  • a further special embodiment is characterized in that the metallized surface of a nonwoven fabric is treated with laser energy, if appropriate after application of a lacquer or printing and then applies printing and / or varnishing to the surface treated with laser energy.
  • the metals layer thicknesses and production processes that are suitable for the metallization, reference is made to the above statements.
  • a further special embodiment is characterized in that the surface of a nonwoven fabric provided with an unpigmented, white or colored pigmented line is treated with laser energy and then a print and / or a varnish is applied to the surface treated with laser energy.
  • the line can also be compacted (satin) and optionally coated.
  • a further special embodiment of the method according to the invention is characterized in that the surface of a nonwoven fabric provided with the above-described line is treated with laser energy, the surface treated with laser energy is metallized and then printing and / or lacquering is applied to the metallized surface.
  • the metals, layer thicknesses and production processes that are suitable for the metallization reference is made to the above statements.
  • a further embodiment is characterized in that the surface of a nonwoven fabric provided with the line described above is metallized, the metallized surface, which can optionally be provided with a varnish or print, is treated with laser energy and printing and / or on the surface treated with laser energy or apply paint.
  • the metals layer thicknesses and production processes that are suitable for the metallization, reference is made to the above statements.
  • a further embodiment according to the invention is characterized in that the surface of a nonwoven fabric is treated with laser energy, the surface treated with laser energy with one as above provided defined stroke and then applied printing and / or varnishing thereon.
  • the marking recognizable in the uppermost coating is usually a logo, a name, a trademark, an illustration, a pattern, a security marking or another identification which makes it easier to identify the printed one / paper described.
  • the laser treatment for inscribing or marking the substrate can be carried out according to the invention using the known method raster scan or vector scan with x-y galvanometer mirrors, polygon scanners or also mask imaging methods.
  • the laser energy required to carry out the method according to the invention can be supplied by a pulsed laser or a continuous wave laser (continuous laser), typically in each case a carbon dioxide laser.
  • Nd YAG lasers
  • frequency-converted Nd YAG lasers
  • copper vapor lasers excimer lasers and diode lasers
  • the laser energy is allowed to act on the layer immediately below the top coating before the top coating is applied.
  • the energy density of the laser is to be set so that the image generated on the surface of the laser-treated layer is visible or at least perceptible.
  • the skilled worker is aware that this is not only dependent on the type of laser (pulsed or continuous wave laser), its energy level, but also on the type of paper and its water content.
  • energy densities in the range from 1.7 to 5.0 joules » cm 2 for pulsed lasers and 2.2 up to 4.8 Joules'cm "2 for continuous wave lasers, depending on the web speed recommended. For papers with a higher moisture content, correspondingly higher laser energies are required.
  • stretching energies are required for papers with low to normal moisture contents of laser energy / laser scanning speed) from 3 to 12 J / m, preferably from 5.5 to 8 J / m.
  • line energies of up to 150 J / m are m required.
  • the energy density of the laser can be between 0.1 and less than 1.7 joules “cm " 2 , preferably between 0.1 and 1.6 joules “ cm “ 2 , particularly preferably between 1.0 and 1.6 joules “cm " 2
  • the changes on the surface of the paper or the coating of the paper produced with these energy densities are not visible or perceptible in transmitted or reflected light, but instead only lead to the generation or visibility of a marking in the subsequent coating or the subsequent coatings
  • the method according to the invention can in principle be carried out with laser energy densities of 0.1 to 5.0 joules cm 2 , wherein, as described above, only the surface to be coated is modified by laser action, which is not necessarily immediately visible / perceptible but only on the coating applied to the recognizable changes in the top coating described below leads.
  • the method according to the invention can be carried out independently of one another
  • a surface is set which, in a subsequent further coating process, in particular a metallization or printing process, changes one surface compared to the material untreated with laser.
  • This change in the surface continues in the subsequent coating (printing, painting, metallization) and leads here to readily recognizable changes in the color density, color location, gloss and / or reflection.
  • the coating arranged thereon is not opaque but transparent according to the definition above, this coating can nevertheless, the marking can be perceived by a change in the reflection and mattness of the surface of the transparent coating.
  • the transparent coatings in question here arranged on the laser-marked layer are those in which the increase in opacity, determined according to the method described above, is 2.5 percentage points or less, preferably 2 percentage points or less.
  • Transparent coatings or lacquers are those comprising nitrocellulose (nitrocellulose lacquers) or acrylates (acrylate lacquers).
  • the method according to the invention it is possible to transfer digitized image templates to the not yet finally coated, in particular printed, metallized and / or lacquered paper, the image then being visible in the uppermost coating after the final coating step, i.e. printing, painting or metallizing becomes.
  • the method according to the invention thus makes it possible to make the marking visible only in the uppermost coating, whereas conventional “watermark” methods aim to make the marking visible in the paper substrate itself for cartons with at least 150 g / m 2 , not usable anyway.
  • the markings produced by the method according to the invention are readily visible or perceptible, in particular on the metallized paper, in the reflected light.
  • the invention further relates to paper products having a marking, such as papers and cardboards, which can be obtained by the process described above.
  • These marked papers and boxes made of a substrate as described above, which was treated with laser energy on its surface and a top opaque coating arranged thereon, on the surface of which the marking, which was produced on the underlying paper substrate by laser, was easily produced by a Change in color density, color location, gloss and / or reflection is perceptible.
  • the uppermost opaque coating applied to the laser-treated layer of the substrate consists of at least one printing and / or at least one metallization and / or at least one varnish or a combination of these individual coatings, which can be applied in different orders.
  • the laser-treated substrate of the paper product i.e. the paper and cardboard substrate
  • the laser-treated substrate of the paper product is selected from the group of non-woven fabrics, non-woven fabrics prepared on the surface, coated non-woven fabrics, which can optionally be prepared and / or metallized below the coating, metallized non-woven fabrics, which may be below the metallization can be prepared and / or coated.
  • the influence of various top coatings on the increase in opacity of paper substrates was determined. For this, the opacity of the paper substrate without. Coating is subtracted from the opacity of the paper substrate having the top coating, in order to obtain information about the opacity or opacity of the coating itself. The difference gave a percentage value, which corresponds to the absolute increase in opacity caused by the coating in percentage points.
  • the opacity of the paper before and after coating was determined in accordance with DIN 53146.
  • ZETA® registered trademark of Zanders Feinpapiere AG, Germany, normal brand treated with unpigmented starch screed
  • Hewlett Packard DeskJet 870 inkjet printer measured for the Hewlett Packard InkJet colors red, green and blue
  • normal print mode 4 laboratory pressure device (company sketchbau), offset colors red and blue, medium color density
  • a continuous carbon dioxide laser with 30 watts of power was used to, using a line energy (laser power / laser scanning speed) of 120 J / m, a nonwoven fabric on a paper machine screen with a water content of 88% by weight with 6 x 35 mm markings.
  • the nonwoven fabric was dried to a moisture content of 6-7% by weight and had a mass per unit area of 85 g / m 2 . After the paper had dried, the paper was printed using offset and inkjet printing processes.
  • a 100 Hz (nominal) pulsed carbon dioxide laser system with a pulse energy of 3.27 J to 5.27 J was used to produce a nonwoven fabric on a paper machine screen with a water content of 88% by weight by means of a shadow projection of 0.64 cm 2 large markings.
  • the nonwoven fabric was dried to a moisture content of 6-7% by weight and had a mass per unit area of 85 g / m 2 . After drying, the paper was printed using offset and inkjet printing processes.
  • the surfaces provided with a mark were printed using offset and inkjet printing processes.
  • the laser markings are reflective
  • a 200 g / m 2 base paper with an aqueous, pigmented coating color formulation and by means of cast coating was Process coated on one side with dry coating weights of approximately 20 g / m 2 , and finished using a high-gloss drying system.
  • a test device was then used to use a continuous carbon dioxide laser with an output power of 30 watts in order to produce, with an operating power of 3 watts and a line power of 6 J / m, 13 ⁇ 70 mm markings in the coating of the paper thus finished.
  • the surface provided with a mark was printed using an offset printing process.
  • the markings were visible in the reflecting light and of good quality.
  • a 30 watt output continuous carbon dioxide laser was used to create 13 x 70 mm markings on various white, uncoated and coated papers using 6 J / m stretch energy, after which the papers were marked on them by laser radiation
  • Surfaces were metallized using metal vapor deposition.
  • the mass per unit area of the papers used were 55, 80 and 220 g / m 2 for the uncoated papers, 70 and 250 g / m 2 for the one-sided coated, 90 and 200 g / m 2 for the two-sided coated papers and the range of the moisture content was from 6 to 8% by weight.
  • This example shows how the markings formed by laser radiation vary at different energy levels.
  • the papers used correspond to those in Example 5, the line energy of the laser radiation being varied from 3 to 12 J / m.
  • a path energy of less than 5 J / m represents an approximate minimum threshold value for uncoated and 4 J / m for coated papers for a visible marking after the metallization. Visible markings are always obtained at line energies of 5.5 to 8 J / m. Line energies of> 8 J / m gave markings with good visibility after the metallization, but the papers already showed relatively strong carbonization phenomena in the area of the markings before the metallization.
  • the marking size was 11 x 12 mm in each case. After the markings had been applied, the surface provided with a mark was metallized by means of metal vapor deposition. The markings obtained after the metallization were clearly visible in the reflecting light and of an acceptable quality. The metallized papers were tested according to Example 5 and were found to be satisfactory.
  • a 100 Hz (nominal) pulsed carbon dioxide laser system with a pulse energy of 2.0 joules was used to produce a white, uncoated 55 g / m 2 paper and a white, one-sided coated 70 g / m 2 paper at web speeds of 50 to 350 m / min using
  • Markings have good visibility in reflected light. After the markings had been applied, the surface provided with a mark was metallized by means of metal vapor deposition. The markings obtained after the metallization were visible in the reflecting light and of acceptable quality. The metallized papers were tested according to Example 5 and were found to be satisfactory.
  • a continuous carbon dioxide laser with a 30 watt output line was used to produce 55 g / m 2 base papers with a moisture content of 6-7% by weight, using an operating power of 3 watts, using a line energy of 6 J / m, with 13 x 70 mm markings, according to which the base papers are coated on one side both on the marked and on the unmarked surfaces with an aqueous, microcapsule-free, pigmented coating color formulation, such as is used in cast-coated papers, with dry coating weights of approximately 20 g / m 2 were coated.
  • This example shows how the markings formed by laser radiation vary at different energy levels.
  • the base paper and the laser were as described in Example 9, the path energy of the laser radiation being varied from 5 to 12 J / m. It has been shown that a path energy of less than 5 J / m represents a minimum threshold for visible marking formation. Visible markings were always obtained at line energies of 5.5 to 9 J / m. Line energies of> 9 J / m gave markings with good Visibility, but the base papers already showed relatively strong signs of carbonization in the area of the markings.

Landscapes

  • Paper (AREA)
  • Laser Beam Processing (AREA)

Abstract

L'invention concerne un procédé pour marquer des substrats en papier recouverts, notamment imprimés, peints ou métallisés. L'invention est caractérisée en ce que l'on traite le substrat en papier au moyen d'une énergie laser avant l'impression, l'application de peinture ou la métallisation. L'invention concerne en outre des papiers et cartons ainsi marqués, produits selon ledit procédé.
EP99924958A 1998-05-20 1999-05-12 Procede pour marquer des papiers et des cartons Expired - Lifetime EP1089882B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19822605A DE19822605C2 (de) 1998-05-20 1998-05-20 Verfahren zur Markierung von Papieren und Kartons und damit erhältliches Papierprodukt
DE19822605 1998-05-20
PCT/EP1999/003286 WO1999060208A2 (fr) 1998-05-20 1999-05-12 Procede pour marquer des papiers et des cartons

Publications (2)

Publication Number Publication Date
EP1089882A2 true EP1089882A2 (fr) 2001-04-11
EP1089882B1 EP1089882B1 (fr) 2002-03-13

Family

ID=7868389

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99924958A Expired - Lifetime EP1089882B1 (fr) 1998-05-20 1999-05-12 Procede pour marquer des papiers et des cartons

Country Status (4)

Country Link
EP (1) EP1089882B1 (fr)
AU (1) AU4142899A (fr)
DE (2) DE19822605C2 (fr)
WO (1) WO1999060208A2 (fr)

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JP4680594B2 (ja) 2002-07-18 2011-05-11 ギーゼッケ ウント デフリエント ゲーエムベーハー 有価証券
ES2238895B1 (es) * 2003-02-11 2007-02-16 Industrias De Hijos De Antonio Fabregas, S.A. Papel de seguridad.
FI119391B (fi) * 2004-01-05 2008-10-31 Stora Enso Oyj Menetelmä tunnistemerkintöjen tuottamiseksi paperiin tai kartonkiin sekä menetelmällä aikaansaatu merkitty materiaali
WO2005108109A1 (fr) 2004-05-05 2005-11-17 Giesecke & Devrient Gmbh Document de valeur
FI20060382A0 (fi) * 2006-04-21 2006-04-21 Stora Enso Oyj Menetelmä paperin tai kartongin merkitsemiseksi ja menetelmällä merkitty materiaali
FI123957B (fi) * 2009-02-20 2014-01-15 Laminating Papers Oy Menetelmä merkinnöin varustetun impregnaatin valmistamiseksi, impregnaatilla pinnoitettu levy sekä impregnaatin käyttö betonivalumuotissa
DE102009037862A1 (de) * 2009-08-18 2011-05-19 Huhtamaki Ronsberg, Zweigniederlassung Der Huhtamaki Deutschland Gmbh & Co. Kg Mehrschichtiges Verpackungsmaterial, Einheit eines derartigen Verpackungsmaterials, daraus hergestellte Verpackung und Rollenmateril
DE102009040359A1 (de) * 2009-09-07 2011-03-10 Heidelberger Druckmaschinen Ag Verfahren zum Erzeugen eines drucktechnischen Merkmals auf einem Substrat eines Druckprodukts
DE102013000445A1 (de) * 2013-01-11 2014-07-17 Giesecke & Devrient Gmbh Verfahren zum Herstellen einer endlosen Papierbahn und Vorrichtung zur Durchführung desselben
BR112018005873B1 (pt) * 2015-09-23 2023-03-14 Stora Enso Oyj Método para impressão de um material de rede úmido compreendendo celulose microfibrilada
CN109195739A (zh) * 2016-06-03 2019-01-11 多佛欧洲有限公司 用于在金属化基材上产生激光标记的系统和方法

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DE3425086C2 (de) * 1984-07-07 1986-12-11 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Verfahren und Vorrichtung zum Erstellen von einzigen Ausfertigungen eines Druckes
DE3431577A1 (de) * 1984-08-28 1986-03-13 Heinr. Aug. Schoeller Söhne GmbH & Co KG, 5160 Düren Verfahren zur herstellung echter wasserzeichen in papier
AT386159B (de) * 1985-10-11 1988-07-11 Oesterr Nationalbank Verfahren und vorrichtung zur herstellung von echtheits-(codierungs)-merkmalen auf wertpapieren
GB8607689D0 (en) * 1986-03-27 1986-04-30 Wiggins Teape Group Ltd Imaged microcapsule-coated paper
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Title
See references of WO9960208A2 *

Also Published As

Publication number Publication date
DE19822605C2 (de) 2003-04-17
AU4142899A (en) 1999-12-06
DE19822605A1 (de) 1999-11-25
WO1999060208A2 (fr) 1999-11-25
EP1089882B1 (fr) 2002-03-13
DE59900991D1 (de) 2002-04-18
WO1999060208A3 (fr) 1999-12-29

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