EP2292439A1 - Sicherheitsdruckpapier und Verfahren zu ihrer Herstellung - Google Patents

Sicherheitsdruckpapier und Verfahren zu ihrer Herstellung Download PDF

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Publication number
EP2292439A1
EP2292439A1 EP10290382A EP10290382A EP2292439A1 EP 2292439 A1 EP2292439 A1 EP 2292439A1 EP 10290382 A EP10290382 A EP 10290382A EP 10290382 A EP10290382 A EP 10290382A EP 2292439 A1 EP2292439 A1 EP 2292439A1
Authority
EP
European Patent Office
Prior art keywords
paper
printing paper
security
printed
secure printing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP10290382A
Other languages
English (en)
French (fr)
Inventor
Louis Lamy
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.)
SARL Imprimerie Papeterie de Montchapet
Original Assignee
SARL Imprimerie Papeterie de Montchapet
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 SARL Imprimerie Papeterie de Montchapet filed Critical SARL Imprimerie Papeterie de Montchapet
Publication of EP2292439A1 publication Critical patent/EP2292439A1/de
Withdrawn legal-status Critical Current

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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
    • 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
    • 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
    • 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
    • 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
    • D21H21/48—Elements suited for physical verification, e.g. by irradiation
    • 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
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/02—Patterned paper

Definitions

  • the present invention relates to a secure printing paper and its method of production.
  • a certain number of documents are published by professionals or administrations on specific papers serving as identification support for the issuer of the document.
  • Examples of such printing papers are letterhead papers identifying the companies, bill carriers, accounting documents, administrative forms, physico-chemical results sheets, medical prescription tickets. , labels, etc.
  • anti-photocopying security threads or holograms have also been developed, more specifically for valuable documents such as banknotes or checks, to ensure the validity and authenticity of these valuable documents.
  • valuable documents such as banknotes or checks
  • the patent US2003 / 0038974 proposes a graphic technique of security of documents and in particular of checks. This technique is based on the use of original dots (or raster dots), called "dots logos", containing a microscopic image. With the naked eye, the difference with a point of simili or conventional frame is imperceptible. With amplifier means of the son-son type, the special pattern of the logo dot appears.
  • the logo point of the invention is achieved by a specific arrangement of the pixels within the point of simili. Thus, the reproduction of identical logo points by a photocopier or a scanner is impossible. First, because the sensors of these machines do not have sufficient resolution for distinguish and reproduce the microscopic image of the logo dot.
  • the specific arrangement of the pixels at its logo point gives it light reflection and transmission properties that are slightly different from a point of similar or conventional frame, color and density identical.
  • a text or a drawing printed with these logo points within conventional halftone or weft points will stand out in contrast when an attempt is made to reproduce by photocopy or scanner: the security sign is made visible by this attempt.
  • the present invention therefore aims to obviate the disadvantages of known secure papers and to address the issues raised.
  • the subject of the invention is a secure printing paper which is remarkable in that it comprises at least one security sign printed on its surface, said security sign being printed in the background on the surface of the paper with the minus one thermochromic ink and said security sign being constituted by a drawing comprising at least three zones with a distinct screening for each of the zones, the raster value varying between 18 and 50%, inclusive limits and said drawing comprising at least one zone to frame value of 45 to 50%.
  • the frame value is defined compared to a maximum of 100% which corresponds to a solid print. We therefore mean by frame value a print density and a value of 18 to 50% therefore corresponds to a lightening.
  • the security sign is printed in the background, that is to say that a text can come to cover the security sign without the reading of this text is disturbed.
  • thermochromic ink with a security sign obtained by amalgam printing of different printing frames, in the range of values used, made it possible to obtain a paper provided with a security sign that did not appear in its entirety when photocopied and whose authenticity of colors was obviously not reproduced in the original hues and patterns when using a scanner.
  • thermochromic inks are special inks available from a limited number of suppliers.
  • the invention thus satisfactorily and economically addresses the issues of traceability and securing paper documents.
  • FIG. figure 1 single annex represents a non-limiting example of drawing of the security sign according to the invention.
  • the paper to be printed comprises at least one security sign printed in the background on said paper with a thermochromic ink.
  • the paper may therefore include one or more identical or different security signs.
  • the security sign may be a text or a drawing, such as a logo.
  • the design of the security sign 1 comprises at least three zones 2,3,4 with a separate screening for each of the zones, the raster value varying between 18 and 50%, limits included.
  • zone 2 has a frame value of 25%, zone 3 of 35% and zone 4 of 50%.
  • the design of the safety sign is visible to the naked eye; it is not microscopic in size. It almost disappears during attempts to reproduce by photocopy: it is this disappearance of the drawing that alerts the attempt to reproduce and that allows to verify if a document is printed on a secure paper according to the invention.
  • the drawing comprises at least one zone with a frame value of 45 to 50%.
  • the raster value of this zone varies from 47 to 50%, preferably from 48 to 50% and more preferably the value is 50%.
  • this drawing area has a typical geometric or graphical shape.
  • the shape of the 45-50% field value zone can be taken from: letters, numbers, disc, oval, regular or irregular polygons (square, rectangle, rhombus, trapezoid, triangle, pentagon, hexagon, octagon, dodecagon), stars.
  • zone 4 thus has the shape of an oval.
  • This optional feature is particularly advantageous: because of the contrasts to be applied to capture the image of the security sign, the area concerned perceptibly emerges during attempts to reproduce the security sign by photocopy or by means of a scanner; if the intensity of the reproduction machine is at its maximum, then this area with a 45-50% screen value is very prominently displayed. In addition, if the area with a 45-50% screen has a typical geometric shape, it will be easily identifiable by anyone who needs to ensure the authenticity of a document and will easily detect an attempted fraud.
  • the printing of the security sign in the background is preferably performed according to the OFFSET printing technique. This is indeed the most economically interesting technique.
  • the printing of the sign is preferably made in imitation of watermark, with a degree of transparency of the sign.
  • the ink used is a thermochromic ink.
  • thermochromic inks designed specifically for the OFFSET printing technique will be used.
  • thermochromic ink for example specifically intended for silk screen printing, could be used without departing from the scope of the present invention.
  • thermochromic inks we can combine several thermochromic inks to obtain a given shade.
  • the ink used is a mixture of a thermochromic ink and a conventional ink with a mass ratio of 1 to 5 conventional ink per 100 thermochromic ink.
  • thermochromic ink for example, anthracite gray tending to black can be obtained by mixing 2% of conventional black ink with thermochromic blue.
  • thermochromic ink 100 between conventional ink and thermochromic ink is important because it keeps the security effect obtained with a 100% thermochromic ink.
  • the drawing may be monochrome or polychrome, in whole or in certain areas only.
  • each area of the drawing with a different frame value may be in a different color; or the different zones may result from a superposition of frames of different colors, as is easily permitted by the amalgam printing technique.
  • thermochromic inks change color or become colorless when a certain temperature is exceeded.
  • Such inks printed with a constant frame value over the entire pattern are reproducible by means of a scanner and, depending on the frame value used, especially 100%, appear in the photocopy.
  • their manufacturer does not guarantee them as non-reproducible inks by photocopying, these inks not being designed for this purpose.
  • thermochromic inks pure or mixed with conventional inks in the aforementioned proportions and of a drawing drawn in amalgam with printing frame values varying within the specified range, makes it possible to obtain the desired security object of the present invention.
  • securing is achieved by the alteration of the security sign reproduced by photocopy (almost total disappearance) or scanner (altered colors).
  • the paper to be printed will have a basis weight greater than or equal to 75 gr / m2.
  • the security sign printed on the paper may be of any nature (text or graphic) but it will be preferable to use logotypes associated with those of the organization (company, association, etc.) for which the paper to be printed has been published or specifically dedicated to certain sectors of activity (medical analysis laboratories for example).
  • the secure printing paper may include special references related to the printer causing the said paper and include other specific mentions to ensure identification of the origin and the traceability of said secure paper.
  • the printing paper according to the invention may especially be used to produce letterhead paper, ticket paper, invoices, balance sheets, medical analysis results sheets, medical prescription paper, administrative forms and forms, fishing license cards, product labels, etc.
  • This method therefore consists in printing a specific security sign on the surface of a paper to be printed, that is to say intended to receive text defined by the user of the paper.
  • the security sign is printed according to the OFFSET technique with at least one thermochromic ink, pure or mixed with one or more thermochromic inks and / or one or more conventional inks, the latter being in a total mass proportion of 1 to 5: 100 per ratio to total thermochromic inks.
  • the printing is a so-called watermark printing.
  • the design of the printed security sign comprises at least three zones with a separate screening for each of the zones, the frame values varying between 18 and 50% and an area having a frame value of between 45 and 50%.
  • the drawing of the drawing with the zones at different frame values is made in amalgam of frames.
  • the drawing may be monochrome or polychrome.
  • thermochromic inks than those given as examples without departing from the scope of the present invention and that letterhead paper is a particularly preferred application of the invention. invention, she is in no way limiting the fields of application of the latter.

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  • Printing Methods (AREA)
  • Credit Cards Or The Like (AREA)
EP10290382A 2009-07-10 2010-07-09 Sicherheitsdruckpapier und Verfahren zu ihrer Herstellung Withdrawn EP2292439A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0903407A FR2947842B1 (fr) 2009-07-10 2009-07-10 Papier a imprimer securise et procede d'obtention

Publications (1)

Publication Number Publication Date
EP2292439A1 true EP2292439A1 (de) 2011-03-09

Family

ID=41416104

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10290382A Withdrawn EP2292439A1 (de) 2009-07-10 2010-07-09 Sicherheitsdruckpapier und Verfahren zu ihrer Herstellung

Country Status (2)

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EP (1) EP2292439A1 (de)
FR (1) FR2947842B1 (de)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6413305B1 (en) * 2000-02-07 2002-07-02 The Standard Register Company Thermochromic ink composition
US20020185035A1 (en) * 2001-06-08 2002-12-12 Yosuke Kitagawa Thermosensitive color-changing dry offset ink and a printed material using the same
US20030038974A1 (en) 2001-08-14 2003-02-27 Huver Hu Security document manufacturing method and apparatus using halftone dots that contain microscopic images
US20040209096A1 (en) * 2001-07-25 2004-10-21 Ludwig Brehm Halftone image produced by printing
EP1525994A2 (de) * 2003-10-24 2005-04-27 Pitney Bowes, Inc. Verfahren zum Halbtondrucken mit Mehrfachsignale übersendender Tinte

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6413305B1 (en) * 2000-02-07 2002-07-02 The Standard Register Company Thermochromic ink composition
US20020185035A1 (en) * 2001-06-08 2002-12-12 Yosuke Kitagawa Thermosensitive color-changing dry offset ink and a printed material using the same
US20040209096A1 (en) * 2001-07-25 2004-10-21 Ludwig Brehm Halftone image produced by printing
US20030038974A1 (en) 2001-08-14 2003-02-27 Huver Hu Security document manufacturing method and apparatus using halftone dots that contain microscopic images
EP1525994A2 (de) * 2003-10-24 2005-04-27 Pitney Bowes, Inc. Verfahren zum Halbtondrucken mit Mehrfachsignale übersendender Tinte

Also Published As

Publication number Publication date
FR2947842A1 (fr) 2011-01-14
FR2947842B1 (fr) 2014-05-09

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