WO2019037887A1 - Élément de sécurité pour emballages et procédé de production d'un élément de sécurité présentant une haute netteté des contours dans des éléments d'impression produits par impression en creux - Google Patents

Élément de sécurité pour emballages et procédé de production d'un élément de sécurité présentant une haute netteté des contours dans des éléments d'impression produits par impression en creux Download PDF

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Publication number
WO2019037887A1
WO2019037887A1 PCT/EP2018/000344 EP2018000344W WO2019037887A1 WO 2019037887 A1 WO2019037887 A1 WO 2019037887A1 EP 2018000344 W EP2018000344 W EP 2018000344W WO 2019037887 A1 WO2019037887 A1 WO 2019037887A1
Authority
WO
WIPO (PCT)
Prior art keywords
halftone
security
security element
threshold
fractal
Prior art date
Application number
PCT/EP2018/000344
Other languages
German (de)
English (en)
Inventor
Peter Reich
Tanja Rittner
Johann Rodler
Original Assignee
Constantia Hueck Folien Gmbh & Co Kg
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 Constantia Hueck Folien Gmbh & Co Kg filed Critical Constantia Hueck Folien Gmbh & Co Kg
Publication of WO2019037887A1 publication Critical patent/WO2019037887A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery

Definitions

  • the invention relates to a method for generating a high marginal edge sharpness in printing elements produced in gravure printing, in particular filigree elements such as letters, characters, motifs, symbols and the like, which simultaneously have an anti-counterfeiting protection.
  • the method should be able to be used in particular for the production of packaging, for example flexible packaging films, plastic containers and container covers and the like.
  • the outline is usually introduced in its definition already in the electronic image processing.
  • the sharp edge usually has a width of 1 to 20 pm depending on the requirements, in most cases outlines of a width of 5 to 10 pm are generated.
  • a native file produced in the usual Illustrator, ArtPro or PACKZ or similar program is converted into an EPS file and converted into an Opo file. This conversion is necessary to perform the splitting function between grid area 95%) and outline (100%) automatically.
  • the opacity mask is a simplistic image-shaping tool that greatly simplifies the creation of data files, so that this feature should also be preserved in image processing.
  • EP 0477442 A discloses a method for producing such a sharp edge or outline in letters, wherein the outline of the letters is formed by continuous groove-shaped cells and the inner region of the letters by punctiform cells.
  • the corresponding printing tool is produced by laser engraving.
  • the outline (the sharp edge) is introduced into the vector data.
  • JP 3829216 B discloses a method for producing an outline, in which a line drawing template is integrated in a bitmap image by means of a high-resolution flatbed scanner.
  • the outline of a line drawing image is then provided as vector data and the printing tool is produced accordingly.
  • the object of the invention was to provide a security element and a method of producing it, which has sharp edges (outlines) of printing elements, in particular halftone elements, which are produced in the intaglio printing method, and optionally additionally a forgery-proof feature is produced.
  • the method should be particularly suitable for the production of packaging, in particular flexible packaging films of plastics or metallic foils, plastic containers and container covers made of plastic films or metallic or metallized carrier substrates.
  • the invention therefore provides a security element for packaging, wherein the security element has a carrier substrate, characterized in that the security element is a printed security feature in the form of letters, logos, characters, numbers, symbols, motifs and the like, wherein the security feature is present as a halftone element and has at least partially a sharp edge (outline) has formed and the security element may have a fractal halftone image as another security feature.
  • a further subject matter of the invention is a method for producing a high marginal edge sharpness in printing elements produced in gravure printing, which are present as halftone elements, in particular of security features, characterized by the following method steps:
  • the security element according to the invention has on a Strombtrat at least one printed security feature that is generated by gravure printing or another known printing method, such as flexo, offset, screen, digital printing or the like.
  • flexible carrier films are preferably plastic films, for example, PI, PP, MOPP, PE, PPS, PEEK, PEK, PEI, PSU, PAEK, LCP, PEN, PBT, PET, PA, PC, COC, POM, ABS, PVC , PTFE, ETFE (ethylene tetrafluoroethylene), PTFE (polytetrafluoroethylene), PVF (polyvinyl fluoride), PVDF (polyvinylidene fluoride), and EFEP (ethylene-tetrafluoroethylene-hexafluoropropylene fluoropolymer).
  • plastic films for example, PI, PP, MOPP, PE, PPS, PEEK, PEK, PEI, PSU, PAEK, LCP, PEN, PBT, PET, PA, PC, COC, POM, ABS, PVC , PTFE, ETFE (ethylene tetrafluoroethylene), PTFE (polytetrafluoroethylene),
  • the carrier films preferably have a thickness of 5 to 700 ⁇ m, preferably 5 to 200 ⁇ m, particularly preferably 5 to 50 ⁇ m.
  • thermally activated paper or composites with paper for example composites with plastics having a basis weight of 20 - 500 g / m 2 , preferably 40 - 200 g / m 2 . be used.
  • woven or nonwovens such as continuous fiber webs, staple fiber webs and the like, which may optionally be needled or calendered, may be used as the carrier substrates.
  • fabrics or webs of plastics such as PP, PET, PA, PPS and the like, but it can also be woven or nonwovens made of natural, optionally treated fibers, such as viscose fibers are used.
  • the nonwovens or fabrics used have a weight per unit area of about 20 g / m 2 to 500 g / m 2 . If necessary, the nonwovens or fabrics must be surface-treated.
  • the carrier substrate is printed, for example by gravure printing with at least one security feature.
  • fragile elements in the form of letters, logos, characters, numbers, symbols, motifs and the like are preferably suitable.
  • a TIFF file is created in electronic image processing.
  • this has a resolution of 320 to 25600 dpi, more preferably 3200 to 12800 dpi.
  • a threshold is then defined, from which on the halftone element a sharp edge (outline) is added.
  • the threshold is preferably 90-95%.
  • a halftone element has information between 0 and 100%. In the range between 96 and 100%, no visual difference is generally discernible. For example, this range is calculated at 95%. As a result, no visual difference is recognizable, the image information contained in the range of 96-100% is compressed so to speak, whereby a sharp edge is formed.
  • the halftone element may be a halftone image and / or a text consisting of letters, numbers or the like.
  • two threshold values are defined, on the one hand the upper limit for full-tone representation, and on the other hand the lower limit for white.
  • the threshold values are dependent on the saturation of the image content, in particular on the expression of the black channel. Furthermore, the Line width for the fractal halftone image, which is finally in the form of a line image defined.
  • a corresponding data file is created in the electronic image processing with the elements to be printed, wherein for the sharp edge or even for the representation of a fractal halftone image, the half-tone representation is converted into a stroke representation.
  • the fractal halftone image is preferably created from a motif or from an image.
  • individual motifs can be processed according to customer requirements.
  • individual fractal halftone images can be created, which are then unique, for example, for a specific packaging.
  • the fractal halftone image is then clearly attributable, for example, to a defined packaging for a defined product.
  • the choice of the threshold value also depends on the chosen motif. In general, it is advantageously placed in the area where the main modulation is to be found.
  • the proof of a forgery of the fractal half-image can be done in a simple manner.
  • the fractal image is scanned in with a high resolution scanner and the pixels of that image are compared to the pixels of the original image using conventional comparison software such as Esko Graphics Viewer, Global Vision, EyeC, Gradient Pixelproof or the like.
  • a method is preferably used in which a corresponding printing cylinder with the aid of the laser or Electron beam technology according to the desired patterns, images, lines, letters, shapes and the like is illustrated.
  • the data file produced as described above is then exposed to a prepared printing cylinder in a corresponding exposure system.
  • a gravure cylinder with a core of iron pipe with a wall thickness of about 20 mm for example a gravure cylinder with a core of iron pipe with a wall thickness of about 20 mm, and the following layers: 5-7 pm nickel layer, about 300 pm copper layer; existing photosensitive layer with the corresponding patterns; Shapes, lines, letters in the form of the previously defined grid are illustrated, developed and etched.
  • the coating of the cylinder is carried out in the usual way with a Kunststoffübertragungsrad, or by spraying, rolling, brushing, dipping, or by a curtain coating process, preferably in a layer thickness of 2-10 pm with a commercially available photosensitive composition-for example, LD 100, OHKA Kogyo Ltd or TSER-2104 E4 Fa. Think Laboratory.
  • a commercially available photosensitive composition for example, LD 100, OHKA Kogyo Ltd or TSER-2104 E4 Fa. Think Laboratory.
  • compositions are also suitable. It is then exposed directly and / or then the cylinder is provided with an overcoat with a layer thickness of 1 - 5 pm, for example with OC-40 (OHKA Kogyo Ltd) or with an analogous similar commercially available composition.
  • the development takes place after the exposure in the usual manner, for example, contactless with sodium carbonate (0.5% solution), this is usually followed by a cleaning process with water, after which the cylinder is dried.
  • the image, patterns, shapes and the like defined by the laser or electron beam imaging become visible the surface of the cylinder is reflected.
  • the etching can be carried out in various ways, for example by means of a Fe (III) chloride solution or a Cu (H) chloride solution, if appropriate with the addition of HCl or H 2 SO 4. If appropriate, commercially available and known additives for flank protection can also be added to the etching solution.
  • the duration of the action of the etchant depends on the etchant used and is for example when using a Cu-chloride solution with the addition of an acid about 90-2400 sec.
  • the cylinder looks blunt and visually dark after the etching process.
  • a surface treatment with electrolytic or chemical shining the impression structure can be refined and a brilliant surface can be produced.
  • the engraving stylus is preferably a diamond stylus.
  • symmetrically ground diamond styluses are used for producing the surface structures of an embossing tool, the styluses each being symmetrically usually at an angle of 90 °.
  • 105 deg. , 110 deg. , 120 deg. , 130 deg. or 140 deg. is ground.
  • small wells are engraved into the cylinder (for example, a copper cylinder) with this engraving stylus.
  • the engraving stylus is installed by all manufacturers of engraving machines (e.g., Ohio Engravers, Hell, Daetwyler) in an engraving head to which 2 different control units are attached.
  • the actuator for the engraving depth is controlled by an applied DC voltage.
  • the frequency of cell production is controlled by an applied AC voltage.
  • the engraving heads work between 2800 and 15000 Hz. That is, the engraving machine is able to beat 8000 cells at 8000 Hz into the copper cylinder.
  • the depth of the wells is controlled by the intensity of the DC voltage.
  • a 256 stripe mode (8 bit) is preferably used. This enables the generation of different color strengths in 256 steps.
  • the corresponding angles of the stylus are selected depending on the above-mentioned desired properties of the desired structure.
  • the AC voltage can be deactivated or modulated.
  • the modulation of the AC voltage can be modulated amplitude or envelope curves. This makes it possible by modulation of the DC voltage different depths, for example, in 256 different depths to introduce into the cylinder: Through this modification no longer arranged in the grid cells are generated, but the cylinder is structured. As a result, the corresponding webs can be introduced in point form.
  • the gravure tool can be produced on a known engraving system, for example on an Ohio or Hell engraving system.
  • a TransScribe Intagliokopf or xtreme engraving head with DC voltage control used.
  • the usually present alternating voltage supply to the engraving head can be deactivated or modulated.
  • the feed of the engraving head is calculated.
  • the DC voltage can now be the desired structure, depending on the height of the DC voltage of the engraving head in the coating of the cylinder, in or nickel, zinc, plastics, elastomers, preferably introduced into a copper coating.
  • the cylinder may then be nickel plated or chrome plated in the usual way.
  • a surface treatment with the electrolytic or chemical shining refines the impression structure and produces a brilliant surface.
  • Such a printing cylinder can also be produced in a direct laser or electron beam process.
  • a suitable printing surface e.g. Chromium, copper, nickel, zinc, as well as plastic, elastomers or polymer surfaces etc. are irradiated with the help of a high-energy beam and the material is removed directly.
  • the laser beams are equipped with a beam width of 10 pm.
  • beam shapes or beam sizes for example 5 ⁇ m or else 1 ⁇ m or 800 nm (femtosechnology).
  • the halftone elements are introduced by means of engraving and the line elements by means of laser on the printing tool, but also a different combination or mixture technically and procedurally possible.
  • FIG. 2 shows a fractal halftone image which serves as an additional security element.
  • FIG. 2a shows the original image, which in this case represents a collection of potato chips.
  • Figures 2b, 2c and 2d show fractal halftone images made from the original image.
  • a line thickness of 0.006 mm was defined, for the image in FIG. 2c a line thickness of 0.03 mm and for the image in FIG. 2d a line thickness of 0.04 mm.
  • line weights can be defined, for example, a line thickness of 0.060 mm.

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  • Printing Methods (AREA)
  • Printing Plates And Materials Therefor (AREA)

Abstract

L'invention concerne un élément de sécurité pour emballages, cet élément de sécurité présentant un substrat de support, caractérisé en ce que l'élément de sécurité présente une marque de sécurité imprimée sous forme de lettres, de logos, de signes, de chiffres, de symboles, de motifs et analogues, la marque de sécurité se présentant sous la forme d'élément en demi-teinte doté au moins par endroits d'un contour net (outline) et l'élément de sécurité présentant une image en demi-teinte comme autre marque de sécurité. L'invention concerne également un procédé pour sa fabrication.
PCT/EP2018/000344 2017-08-24 2018-07-05 Élément de sécurité pour emballages et procédé de production d'un élément de sécurité présentant une haute netteté des contours dans des éléments d'impression produits par impression en creux WO2019037887A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP17001433.6A EP3446885A1 (fr) 2017-08-24 2017-08-24 Élément de sécurité pour emballage et procédé de fabrication d'un élément de sécurité à haute acuité des bords extrêmes durant la fabrication des éléments d'impression par impression en relief
EP17001433.6 2017-08-24

Publications (1)

Publication Number Publication Date
WO2019037887A1 true WO2019037887A1 (fr) 2019-02-28

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PCT/EP2018/000344 WO2019037887A1 (fr) 2017-08-24 2018-07-05 Élément de sécurité pour emballages et procédé de production d'un élément de sécurité présentant une haute netteté des contours dans des éléments d'impression produits par impression en creux

Country Status (2)

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EP (1) EP3446885A1 (fr)
WO (1) WO2019037887A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3633596A1 (fr) * 2018-10-02 2020-04-08 Constantia Pirk GmbH & Co. KG Procédé d'identification, de vérification d'authenticité et de suivi d'emballages de produits

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0477442A1 (fr) 1989-07-03 1992-04-01 Think Laboratory Co., Ltd. Méthode pour la formation de caractères d'impression pour la fabrication de plaques pour l'héliogravure en demi-teintes
WO2006087129A2 (fr) * 2005-02-21 2006-08-24 Giesecke & Devrient Gmbh Support de donnees a image en demi-teinte
JP3829216B2 (ja) 1999-03-17 2006-10-04 独立行政法人 国立印刷局 凹版画線形成体
EP1998550A1 (fr) * 2007-05-24 2008-12-03 Constantia Hueck Folien GmbH & Co. KG Caractéristique de sécurité morphologique

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0477442A1 (fr) 1989-07-03 1992-04-01 Think Laboratory Co., Ltd. Méthode pour la formation de caractères d'impression pour la fabrication de plaques pour l'héliogravure en demi-teintes
JP3829216B2 (ja) 1999-03-17 2006-10-04 独立行政法人 国立印刷局 凹版画線形成体
WO2006087129A2 (fr) * 2005-02-21 2006-08-24 Giesecke & Devrient Gmbh Support de donnees a image en demi-teinte
EP1998550A1 (fr) * 2007-05-24 2008-12-03 Constantia Hueck Folien GmbH & Co. KG Caractéristique de sécurité morphologique

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