EP0710508A1 - Procédé pour fabriquer des revêtments ayant des effets optiques tri-dimensionnels - Google Patents

Procédé pour fabriquer des revêtments ayant des effets optiques tri-dimensionnels Download PDF

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Publication number
EP0710508A1
EP0710508A1 EP95116928A EP95116928A EP0710508A1 EP 0710508 A1 EP0710508 A1 EP 0710508A1 EP 95116928 A EP95116928 A EP 95116928A EP 95116928 A EP95116928 A EP 95116928A EP 0710508 A1 EP0710508 A1 EP 0710508A1
Authority
EP
European Patent Office
Prior art keywords
transfer medium
magnetic
configuration
electromagnet
process according
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Withdrawn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
EP95116928A
Other languages
German (de)
English (en)
Inventor
Hans Jürgen Dr. Richter
Ekkehard Dr. Schwab
Raimund Dr. Schmid
Norbert Dr. Mronga
Werner Dr. Ostertag
Helmut Schmidt
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.)
BASF SE
Original Assignee
BASF SE
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 BASF SE filed Critical BASF SE
Publication of EP0710508A1 publication Critical patent/EP0710508A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/20—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by magnetic fields
    • B05D3/207—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by magnetic fields post-treatment by magnetic fields
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • B05D5/06—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain multicolour or other optical effects
    • B05D5/061—Special surface effect
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44F—SPECIAL DESIGNS OR PICTURES
    • B44F7/00—Designs imitating three-dimensional effects

Definitions

  • the present invention relates to a new process for producing coatings having three-dimensional optical effects by aligning magnetically orientable, platelet-shaped pigments.
  • Prints or varnishes that show three-dimensional optical characteristics are not only suitable for decorative purposes, but are also of particular interest for the production of counterfeit-proof materials, in particular for security printing, since they cannot be photocopied and therefore can be easily distinguished from the original and enable counterfeiting.
  • Such three-dimensional optical effects can advantageously be generated by aligning magnetic, platelet-shaped pigments in the still liquid application medium under the influence of a magnetic field and fixed by subsequent curing of the application medium.
  • DE-A-39 38 055 discloses various methods for producing three-dimensional patterns by orienting magnetizable, platelet-shaped pigments, in particular mica and aluminum platelets, which are coated with a magnetic layer or are mixed with magnetic material.
  • One of these methods is that the desired pattern is applied to a mumetal foil by punching or cutting, the layer to be aligned is placed on this foil and a magnetic field of a suitable size is generated under the foil, whereby the magnetic pigment particles should be aligned according to the desired pattern.
  • the disadvantage here is that an optimal, ie complete, field configuration of the magnetic particles is not achieved via the mumetal foil and that a new mummetal foil has to be prepared for each pattern.
  • a lettering is written directly into a moist print by moving a permanent magnet along it.
  • a certain exposure time of the magnetic field i.e. a slow movement of the magnet is necessary, which is why the layer has partially dried before the "writing" process has ended.
  • a third method combines magnetic field treatment with UV light treatment to harden the layer.
  • the moist layer is exposed through a photomask, then the pigment particles in the still moist areas are magnetically aligned, and then the entire layer is cured by UV light.
  • the object of the invention was to remedy the deficiencies mentioned and to provide a practical alignment method.
  • Plastic films in which hard magnetic particles are incorporated are particularly suitable as a magnetizing sheet-like transfer medium for the method according to the invention, but other sheet-like magnetic designs could also be used.
  • the plastic films can be placed on a thin support, e.g. an adhesive film, be applied, but preferably it is carrier-free materials, especially magnetic films or magnetic adhesive films or magnetic tapes, as are generally available commercially.
  • the thickness of these materials is usually 0.1 to 5 mm.
  • the hard magnetic particles contained in the plastic films can consist, for example, of the following hard magnetic materials:
  • Hard ferrites such as barium and strontium ferrite; Rare earth alloys such as samarium / cobalt alloys; the AlNiCo group; Metal oxides used for magnetic information storage such as cobalt-containing ⁇ -iron (III) oxide, chromium dioxide or pure iron particles.
  • Typical dimensions of the hard magnetic particles are generally from a few 10 ⁇ m down to 10 to 20 nm.
  • the production of the magnetic particles can be carried out in the usual way, e.g. by sintering or rapid quenching and subsequent comminution.
  • the magnetic properties of the transfer medium do not have to meet any special requirements, but materials with high saturation magnetization are generally advantageous. It is also advantageous if the coercive field strength is approximately the same as the magnetization of the entire transfer medium, but this is not a requirement.
  • the thickness of the transfer medium preferably corresponds to 0.3 to 3 times the resolution desired in the finished effect coating.
  • the desired three-dimensional optical effects are transferred via the magnetic field of the previously configured transfer medium to the magnetically orientable platelet-shaped pigments in the still moist coating (e.g. printing or painting).
  • the subsequent configuration of the transfer medium i.e.
  • the targeted remagnetization of the partial magnets, for writing in the desired information or the three-dimensional pattern, can be particularly advantageous by relative movement of the transfer medium either to (between) the pole pieces of a two-sided electromagnet or to the pole piece of a one-sided pole shoe equipped on one side only, pin-like electromagnets.
  • FIGS. 1 and 2 Preferred configurations of the two-sided and the one-sided embodiment are shown schematically in FIGS. 1 and 2.
  • FIG. 1 shows the preferred vertical arrangement of the movable transfer medium (T) in the gap of an electromagnet equipped with pole shoes (P) on both sides.
  • FIG. 2 shows the preferred vertical arrangement of the transfer medium (T), which in turn is movable, to the pole shoe (P) of the one-sided, pin-like electromagnet.
  • T transfer medium
  • P pole shoe
  • W soft magnetic plate
  • the coils (S) can be oriented at other points in the magnetic circuit or can be completely or partially replaced by permanent magnets.
  • the diameter in the pole shoe tip depends on the desired spatial resolution in the effect coating and is usually about 0.3 to 3 times this resolution.
  • the field strength in the gap of the two-sided electromagnet or the field strength in front of the pole of the one-sided electromagnet (pin) preferably corresponds to the coercive field strength of the transfer medium.
  • the two-sided design of the electromagnet usually results in a better resolution of the inscribed three-dimensional pattern.
  • the one-sided, pen-like design is easier to handle.
  • one or the other version will be preferred.
  • the configured transfer medium is made possible completely and evenly with the still wet coating (printing or painting), in which the pigment particles are still mobile.
  • the coated material is preferably simply placed on the transfer medium.
  • all magnetically orientable, platelet-shaped pigments can be easily and specifically aligned.
  • examples include the ferromagnetic metal platelets listed in US Pat. No. 2,570,856 and the mica and aluminum platelets listed in DE-A-39 38 055, which are coated with magnetite, and those in DE-A-43 13 541 and the unpublished DE-A-43 40 141 aluminum platelets described, which with an inner iron, cobalt, nickel or ⁇ -iron (III) oxide (maghemite) containing layer, another non-ferromagnetic metal oxide layer and / or an outer passivating phosphate, chromate - and / or a layer containing vanadium are occupied.
  • A iron, cobalt, nickel, magnetite and / or ⁇ -Fe2O3,
  • B silicon oxide and / or aluminum oxide
  • C Have metal and / or non-selectively absorbing metal oxide.
  • the exposure times for aligning the pigment particles are only 1 to 100 seconds, regardless of the complexity of the pattern.
  • the subsequent drying process after which the pigment particles and hence the three-dimensional optical effects are fixed, can be accelerated by additional UV radiation.
  • three-dimensional optical effects can advantageously be achieved by simply adapting the method parameters (pole shoe diameter and field strength of the magnet, contact time, thickness and coercive field strength of the transfer medium) safely and with the desired (good) resolution, ie with the desired contrast and the desired strength.
  • magnetically orientable coatings containing platelet-shaped pigments, such as prints or coatings in magnetically orientable coatings containing platelet-shaped pigments, such as prints or coatings.
  • the present method is characterized by its low time requirement (short registration times and short transmission times), the reusability of the transfer medium, which can be magnetized uniformly at any time with the help of a strong permanent magnet and is then available again for further enrollment processes, and the possibility of automation by computer control, particularly due to its economy.
  • a commercially available 1 mm thick barium ferrite-containing magnetic adhesive film (from IBS, Berlin) was repeated after complete magnetization with a strong permanent magnet (Nd2Fe14B) while moving at a speed of about 1 cm / sec using an electromagnet equipped with pole shoes on both sides ( Pole shoe spacing about 1 mm, 2 coils with 480 turns each) described with a zigzag pattern.
  • the pole shoe diameter and current were varied as indicated in the table.
  • a still moist screen print was then placed on the magnetic film described for 60 seconds.
  • the screen prints used for this were each made by printing (49 screen) a screen printing ink, the 20 g magnetizable pigment (Example 1 of DE-A-43 13 541) in 80 g of a commercially available binder solution (copolymer based on vinyl chloride and vinyl isobutyl ether ⁇ Laroflex® MP45 / acetate / aliphates) applied to paper or foil.
  • a commercially available binder solution copolymer based on vinyl chloride and vinyl isobutyl ether ⁇ Laroflex® MP45 / acetate / aliphates
  • the zigzag pattern was clearly visible in the dried print in all cases and could not be copied unchanged.

Landscapes

  • Paints Or Removers (AREA)
  • Printing Methods (AREA)
  • Magnetic Record Carriers (AREA)
EP95116928A 1994-11-04 1995-10-27 Procédé pour fabriquer des revêtments ayant des effets optiques tri-dimensionnels Withdrawn EP0710508A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4439455 1994-11-04
DE19944439455 DE4439455A1 (de) 1994-11-04 1994-11-04 Verfahren zur Herstellung von dreidimensionale optische Effekte aufweisenden Beschichtungen

Publications (1)

Publication Number Publication Date
EP0710508A1 true EP0710508A1 (fr) 1996-05-08

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP95116928A Withdrawn EP0710508A1 (fr) 1994-11-04 1995-10-27 Procédé pour fabriquer des revêtments ayant des effets optiques tri-dimensionnels

Country Status (4)

Country Link
EP (1) EP0710508A1 (fr)
CA (1) CA2161816A1 (fr)
DE (1) DE4439455A1 (fr)
FI (1) FI955264A (fr)

Cited By (74)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003000801A2 (fr) 2001-04-27 2003-01-03 Flex Products, Inc. Pigments et films magnetiques multicouches
WO2003029018A1 (fr) * 2001-10-01 2003-04-10 Paradigma S.R.L. Transfert d'image avec encre de sublimation et support en forme de feuille pour l'executer
WO2003053593A2 (fr) * 2001-12-20 2003-07-03 Honeywell International Inc Encres et revetements a coloration physique
EP1398296A2 (fr) * 2002-09-06 2004-03-17 C.R.F. Società Consortile per Azioni Procédé de production d'une microstructure ou nanostructure tridimensionnelle
WO2004024836A2 (fr) * 2002-09-13 2004-03-25 Jds Uniphase Corporation Paillettes pigmentaires de diffraction d'alignement
EP1412096A2 (fr) 2001-05-07 2004-04-28 Flex Products, Inc. Procedes de production d'articles revetus comportant des images dans lesquels on utilise des pigments magnetiques
WO2005000585A1 (fr) * 2003-06-30 2005-01-06 Kba-Giori S.A. Machine d'impression
US7047883B2 (en) 2002-07-15 2006-05-23 Jds Uniphase Corporation Method and apparatus for orienting magnetic flakes
WO2006061301A1 (fr) 2004-12-09 2006-06-15 Sicpa Holding S.A. Element de securite a aspect dependant de l'angle de vision
DE102005017544A1 (de) * 2005-04-16 2006-10-19 Balda Solutions Deutschland Gmbh Verfahren und Vorrichtung zur Herstellung eines Kunstoffbauteils
WO2006114289A1 (fr) * 2005-04-27 2006-11-02 Leonhard Kurz Gmbh & Co. Kg Procede pour produire des elements createurs d'effet de couleurs
US7169472B2 (en) 2003-02-13 2007-01-30 Jds Uniphase Corporation Robust multilayer magnetic pigments and foils
EP1787728A1 (fr) 2005-11-18 2007-05-23 JDS Uniphase Corporation Plaque magnétique pour imprimer des effets optiques
US7241489B2 (en) 2002-09-13 2007-07-10 Jds Uniphase Corporation Opaque flake for covert security applications
WO2007089708A2 (fr) * 2006-02-01 2007-08-09 Basf Catalysts Llc article plastique comprenant des pigments magnétisables à effet orienté
US7258915B2 (en) 2003-08-14 2007-08-21 Jds Uniphase Corporation Flake for covert security applications
US7258900B2 (en) 2002-07-15 2007-08-21 Jds Uniphase Corporation Magnetic planarization of pigment flakes
EP1908598A1 (fr) * 2006-10-04 2008-04-09 Sang Broli Company Limited Procédé et matériau pour la production de motifs imprimés avec effect tridimensionnel
US7517578B2 (en) 2002-07-15 2009-04-14 Jds Uniphase Corporation Method and apparatus for orienting magnetic flakes
US7604855B2 (en) 2002-07-15 2009-10-20 Jds Uniphase Corporation Kinematic images formed by orienting alignable flakes
US7667895B2 (en) 1999-07-08 2010-02-23 Jds Uniphase Corporation Patterned structures with optically variable effects
US7674501B2 (en) 2002-09-13 2010-03-09 Jds Uniphase Corporation Two-step method of coating an article for security printing by application of electric or magnetic field
US7691468B2 (en) 2003-07-03 2010-04-06 Sicpa Holding S.A. Method and means for producing a magnetically induced design in a coating containing magnetic particles
US7729026B2 (en) 2002-09-13 2010-06-01 Jds Uniphase Corporation Security device with metameric features using diffractive pigment flakes
WO2010115928A2 (fr) 2009-04-07 2010-10-14 Sicpa Holding Sa Element piézochrome de sécurité
US7876481B2 (en) 1999-07-08 2011-01-25 Jds Uniphase Corporation Patterned optical structures with enhanced security feature
WO2011012520A2 (fr) 2009-07-28 2011-02-03 Sicpa Holding Sa Feuille de transfert comprenant un pigment magnétique optiquement variable, procédé de fabrication, utilisation d’une feuille de transfert, et article ou document la comprenant
EP2314386A1 (fr) 2009-10-22 2011-04-27 manroland AG Dispositif et procédé de revêtement
US7934451B2 (en) 2002-07-15 2011-05-03 Jds Uniphase Corporation Apparatus for orienting magnetic flakes
WO2011107527A1 (fr) 2010-03-03 2011-09-09 Sicpa Holding Sa Filet ou bande de sécurité comprenant des particules magnétiques orientées dans de l'encre et procédé et moyen permettant de produire le filet ou la bande de sécurité
US8025952B2 (en) 2002-09-13 2011-09-27 Jds Uniphase Corporation Printed magnetic ink overt security image
US8118963B2 (en) 2002-09-13 2012-02-21 Alberto Argoitia Stamping a coating of cured field aligned special effect flakes and image formed thereby
US8246735B2 (en) 2006-05-12 2012-08-21 Sicpa Holding Sa Coating composition for producing magnetically induced images
CN102642419A (zh) * 2012-04-11 2012-08-22 惠州市华阳光学技术有限公司 印刷磁定向母版及磁性颜料印刷品的制造方法及制造装置
US8343615B2 (en) 2002-07-15 2013-01-01 Jds Uniphase Corporation Dynamic appearance-changing optical devices (DACOD) printed in a shaped magnetic field including printable fresnel structures
US8557403B2 (en) 2006-10-17 2013-10-15 Sicpa Holding S.A. Method and means for magnetically transferring indicia to a coating composition applied on a substrate
WO2014086556A1 (fr) 2012-12-07 2014-06-12 Sicpa Holding Sa Compositions d'encre à séchage par oxydation
US8999616B2 (en) 2002-09-13 2015-04-07 Jds Uniphase Corporation Taggent flakes for covert security applications having a selected shape
WO2015086257A1 (fr) 2013-12-13 2015-06-18 Sicpa Holding Sa Procédé de production de couches à effets
US9102195B2 (en) 2012-01-12 2015-08-11 Jds Uniphase Corporation Article with curved patterns formed of aligned pigment flakes
US9164575B2 (en) 2002-09-13 2015-10-20 Jds Uniphase Corporation Provision of frames or borders around pigment flakes for covert security applications
WO2016016028A1 (fr) 2014-07-30 2016-02-04 Sicpa Holding Sa Procédés commandés par courroie permettant de produire des couches à effet optique
WO2016026896A1 (fr) 2014-08-22 2016-02-25 Sicpa Holding Sa Appareil et procédé de production de couches à effet optique
US9458324B2 (en) 2002-09-13 2016-10-04 Viava Solutions Inc. Flakes with undulate borders and method of forming thereof
US9482800B2 (en) 2013-06-10 2016-11-01 Viavi Solutions Inc. Durable optical interference pigment with a bimetal core
EP3098086A1 (fr) * 2015-05-27 2016-11-30 Giesecke & Devrient GmbH Élement de securite piezochrome
EP3178569A1 (fr) * 2016-06-29 2017-06-14 Sicpa Holding Sa Procédés et dispositifs pour produire des couches à effet optique au moyen d'un photomasque
US9701152B2 (en) 2012-08-29 2017-07-11 Sicpa Holding Sa Optically variable security threads and stripes
US9844969B2 (en) 2012-08-01 2017-12-19 Sicpa Holdings Sa Optically variable security threads and stripes
WO2018019594A1 (fr) 2016-07-29 2018-02-01 Sicpa Holding Sa Procédés de production de couches à effet
WO2018033512A1 (fr) 2016-08-16 2018-02-22 Sicpa Holding Sa Procédés de production de couches à effets
WO2018045230A1 (fr) * 2016-08-31 2018-03-08 Viavi Solutions Inc. Orientation de flocons orientables magnétiquement
WO2018141547A1 (fr) 2017-01-31 2018-08-09 Sicpa Holding Sa Appareil et méthode de production de couches à effet optique
EP3409379A1 (fr) * 2017-05-31 2018-12-05 Heinatz GmbH Dispositif d'impression magnétique, procédé de fabrication et utilisation
US10279618B2 (en) 2013-08-05 2019-05-07 Sicpa Holding Sa Magnetic or magnetisable pigment particles and optical effect layers
US10343436B2 (en) 2006-02-27 2019-07-09 Viavi Solutions Inc. Security device formed by printing with special effect inks
WO2019141452A1 (fr) 2018-01-17 2019-07-25 Sicpa Holding Sa Procédés de fabrication de couches à effet optique
US10391519B2 (en) 2013-12-04 2019-08-27 Sicpa Holding Sa Devices for producing optical effect layers
WO2019233625A1 (fr) 2018-06-05 2019-12-12 Giesecke+Devrient Currency Technology Gmbh Pigment à effet, encre d'impression, élément de sécurité, support de données et procédé de fabrication
WO2020025218A1 (fr) 2018-07-30 2020-02-06 Sicpa Holding Sa Procédés de production de couches à effets optiques
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US11186110B2 (en) 2016-08-31 2021-11-30 Viavi Solutions Inc. Article with angled reflective segments
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US11230127B2 (en) 2002-07-15 2022-01-25 Viavi Solutions Inc. Method and apparatus for orienting magnetic flakes
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WO2023161464A1 (fr) 2022-02-28 2023-08-31 Sicpa Holding Sa Procédés de production de couches à effet optique comprenant des particules pigmentaires magnétiques ou magnétisables et présentant un ou plusieurs indices
US11768321B2 (en) 2000-01-21 2023-09-26 Viavi Solutions Inc. Optically variable security devices
WO2024028408A1 (fr) 2022-08-05 2024-02-08 Sicpa Holding Sa Procédés de production de couches à effet optique comprenant des particules de pigment magnétiques ou magnétisables et présentant un ou plusieurs indices
US12020864B2 (en) 2018-07-30 2024-06-25 Sicpa Holding Sa Assemblies and processes for producing optical effect layers comprising oriented magnetic or magnetizable pigment particles

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19860093B4 (de) * 1998-12-23 2008-10-09 Giesecke & Devrient Gmbh Echtheitsmerkmalskombination für Wertdokumente
DE102010009977A1 (de) * 2010-03-03 2011-09-08 Giesecke & Devrient Gmbh Sicherheitselement mit ausgerichteten Magnetpigmenten

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2570856A (en) 1947-03-25 1951-10-09 Du Pont Process for obtaining pigmented films
BE678945A (fr) * 1965-04-15 1966-10-04
DE2006848A1 (en) * 1970-02-14 1971-09-02 Magnetfabrik Bonn GmbH, vormals Gewerkschaft Windhorst, 5300 Bonn Bad Godesberg, Weilburger Lackfabrik, J Grebe, 6290 Weilburg Magnetic loaded varnish for prodn of pat-terns
FR2069355A5 (fr) * 1969-11-14 1971-09-03 Emi Ltd
US4186944A (en) * 1974-04-17 1980-02-05 Emi Limited Security document
US4511616A (en) * 1983-02-14 1985-04-16 Dennison Mfg. Company Anticounterfeit magnetic metallized labels
EP0406667A1 (fr) * 1989-06-27 1991-01-09 Nippon Paint Co., Ltd. Méthode de formation d'une couche à dessins
DE3938055A1 (de) 1989-11-16 1991-05-23 Merck Patent Gmbh Mit plaettchenfoermigen pigmenten beschichtete materialien
EP0556449A1 (fr) * 1992-02-21 1993-08-25 Hashimoto Forming Industry Co., Ltd. Peinture avec dessins faits magnétiquement et objets peints ayant des dessins formés magnétiquement
DE4313541A1 (de) 1993-04-24 1994-10-27 Basf Ag Magnetisierbare Glanzpigmente
DE4340141A1 (de) 1993-11-25 1995-06-01 Basf Ag Magnetisierbare Glanzpigmente
DE4419173A1 (de) 1994-06-01 1995-12-07 Basf Ag Magnetisierbare mehrfach beschichtete metallische Glanzpigmente

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2570856A (en) 1947-03-25 1951-10-09 Du Pont Process for obtaining pigmented films
BE678945A (fr) * 1965-04-15 1966-10-04
FR2069355A5 (fr) * 1969-11-14 1971-09-03 Emi Ltd
DE2006848A1 (en) * 1970-02-14 1971-09-02 Magnetfabrik Bonn GmbH, vormals Gewerkschaft Windhorst, 5300 Bonn Bad Godesberg, Weilburger Lackfabrik, J Grebe, 6290 Weilburg Magnetic loaded varnish for prodn of pat-terns
US4186944A (en) * 1974-04-17 1980-02-05 Emi Limited Security document
US4511616A (en) * 1983-02-14 1985-04-16 Dennison Mfg. Company Anticounterfeit magnetic metallized labels
EP0406667A1 (fr) * 1989-06-27 1991-01-09 Nippon Paint Co., Ltd. Méthode de formation d'une couche à dessins
DE3938055A1 (de) 1989-11-16 1991-05-23 Merck Patent Gmbh Mit plaettchenfoermigen pigmenten beschichtete materialien
EP0428933A2 (fr) * 1989-11-16 1991-05-29 MERCK PATENT GmbH Matériaux recouverts de pigments en paillettes
EP0556449A1 (fr) * 1992-02-21 1993-08-25 Hashimoto Forming Industry Co., Ltd. Peinture avec dessins faits magnétiquement et objets peints ayant des dessins formés magnétiquement
DE4313541A1 (de) 1993-04-24 1994-10-27 Basf Ag Magnetisierbare Glanzpigmente
DE4340141A1 (de) 1993-11-25 1995-06-01 Basf Ag Magnetisierbare Glanzpigmente
DE4419173A1 (de) 1994-06-01 1995-12-07 Basf Ag Magnetisierbare mehrfach beschichtete metallische Glanzpigmente

Cited By (130)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7876481B2 (en) 1999-07-08 2011-01-25 Jds Uniphase Corporation Patterned optical structures with enhanced security feature
US7667895B2 (en) 1999-07-08 2010-02-23 Jds Uniphase Corporation Patterned structures with optically variable effects
US7880943B2 (en) 1999-07-08 2011-02-01 Jds Uniphase Corporation Patterned optical structures with enhanced security feature
US11768321B2 (en) 2000-01-21 2023-09-26 Viavi Solutions Inc. Optically variable security devices
US6838166B2 (en) 2001-04-27 2005-01-04 Flex Products, Inc. Multi-layered magnetic pigments and foils
WO2003000801A2 (fr) 2001-04-27 2003-01-03 Flex Products, Inc. Pigments et films magnetiques multicouches
US6818299B2 (en) 2001-04-27 2004-11-16 Flex Products, Inc. Multi-layered magnetic pigments and foils
EP1412096A2 (fr) 2001-05-07 2004-04-28 Flex Products, Inc. Procedes de production d'articles revetus comportant des images dans lesquels on utilise des pigments magnetiques
US6759097B2 (en) 2001-05-07 2004-07-06 Flex Products, Inc. Methods for producing imaged coated articles by using magnetic pigments
US9257059B2 (en) 2001-07-31 2016-02-09 Viavi Solutions Inc. Dynamic appearance-changing optical devices (DACOD) printed in a shaped magnetic field including printable fresnel structures
CN1304207C (zh) * 2001-10-01 2007-03-14 派拉迪格玛有限公司 制造片形介质的方法及其所得的片形介质和使所述片形介质着墨的方法
US7168365B2 (en) 2001-10-01 2007-01-30 Paradigma S.R.L. Transfer of image with sublimating inks and medium in sheet form for performing it
WO2003029018A1 (fr) * 2001-10-01 2003-04-10 Paradigma S.R.L. Transfert d'image avec encre de sublimation et support en forme de feuille pour l'executer
WO2003053593A2 (fr) * 2001-12-20 2003-07-03 Honeywell International Inc Encres et revetements a coloration physique
WO2003053593A3 (fr) * 2001-12-20 2004-09-16 Honeywell Int Inc Encres et revetements a coloration physique
US8726806B2 (en) 2002-07-15 2014-05-20 Jds Uniphase Corporation Apparatus for orienting magnetic flakes
US8343615B2 (en) 2002-07-15 2013-01-01 Jds Uniphase Corporation Dynamic appearance-changing optical devices (DACOD) printed in a shaped magnetic field including printable fresnel structures
US10059137B2 (en) 2002-07-15 2018-08-28 Viavi Solutions Inc. Apparatus for orienting magnetic flakes
US9522402B2 (en) 2002-07-15 2016-12-20 Viavi Solutions Inc. Method and apparatus for orienting magnetic flakes
US7934451B2 (en) 2002-07-15 2011-05-03 Jds Uniphase Corporation Apparatus for orienting magnetic flakes
US11230127B2 (en) 2002-07-15 2022-01-25 Viavi Solutions Inc. Method and apparatus for orienting magnetic flakes
US7517578B2 (en) 2002-07-15 2009-04-14 Jds Uniphase Corporation Method and apparatus for orienting magnetic flakes
US9027479B2 (en) 2002-07-15 2015-05-12 Jds Uniphase Corporation Method and apparatus for orienting magnetic flakes
US10173455B2 (en) 2002-07-15 2019-01-08 Viavi Solutions Inc. Dynamic appearance-changing optical devices (DACOD) printed in a shaped magnetic field including printable fresnel structures
US7258900B2 (en) 2002-07-15 2007-08-21 Jds Uniphase Corporation Magnetic planarization of pigment flakes
US7047883B2 (en) 2002-07-15 2006-05-23 Jds Uniphase Corporation Method and apparatus for orienting magnetic flakes
US7604855B2 (en) 2002-07-15 2009-10-20 Jds Uniphase Corporation Kinematic images formed by orienting alignable flakes
EP1398296A3 (fr) * 2002-09-06 2005-12-28 C.R.F. Società Consortile per Azioni Procédé de production d'une microstructure ou nanostructure tridimensionnelle
US7172795B2 (en) 2002-09-06 2007-02-06 C.R.F. Societa Consortile Per Azioni Method for making three-dimensional structures having nanometric and micrometric dimensions
EP1398296A2 (fr) * 2002-09-06 2004-03-17 C.R.F. Società Consortile per Azioni Procédé de production d'une microstructure ou nanostructure tridimensionnelle
US9458324B2 (en) 2002-09-13 2016-10-04 Viava Solutions Inc. Flakes with undulate borders and method of forming thereof
US7674501B2 (en) 2002-09-13 2010-03-09 Jds Uniphase Corporation Two-step method of coating an article for security printing by application of electric or magnetic field
USRE45762E1 (en) 2002-09-13 2015-10-20 Jds Uniphase Corporation Printed magnetic ink overt security image
US7300695B2 (en) 2002-09-13 2007-11-27 Jds Uniphase Corporation Alignable diffractive pigment flakes
US9164575B2 (en) 2002-09-13 2015-10-20 Jds Uniphase Corporation Provision of frames or borders around pigment flakes for covert security applications
WO2004024836A2 (fr) * 2002-09-13 2004-03-25 Jds Uniphase Corporation Paillettes pigmentaires de diffraction d'alignement
US7241489B2 (en) 2002-09-13 2007-07-10 Jds Uniphase Corporation Opaque flake for covert security applications
US8999616B2 (en) 2002-09-13 2015-04-07 Jds Uniphase Corporation Taggent flakes for covert security applications having a selected shape
WO2004024836A3 (fr) * 2002-09-13 2004-06-03 Flex Products Inc Paillettes pigmentaires de diffraction d'alignement
US8118963B2 (en) 2002-09-13 2012-02-21 Alberto Argoitia Stamping a coating of cured field aligned special effect flakes and image formed thereby
US7729026B2 (en) 2002-09-13 2010-06-01 Jds Uniphase Corporation Security device with metameric features using diffractive pigment flakes
US8025952B2 (en) 2002-09-13 2011-09-27 Jds Uniphase Corporation Printed magnetic ink overt security image
US6902807B1 (en) 2002-09-13 2005-06-07 Flex Products, Inc. Alignable diffractive pigment flakes
US7169472B2 (en) 2003-02-13 2007-01-30 Jds Uniphase Corporation Robust multilayer magnetic pigments and foils
CN100469573C (zh) * 2003-06-30 2009-03-18 卡巴-乔利有限公司 印刷机
AU2004251123B2 (en) * 2003-06-30 2010-01-07 Kba-Notasys Sa Printing machine
US8621997B2 (en) 2003-06-30 2014-01-07 Kba-Notasys Sa Printing machine
US8286551B2 (en) 2003-06-30 2012-10-16 Kba-Notasys Sa Printing machine
WO2005000585A1 (fr) * 2003-06-30 2005-01-06 Kba-Giori S.A. Machine d'impression
EP2189286A3 (fr) * 2003-06-30 2010-08-04 Kba-Giori S.A. Machine et procédé d'impression
US7691468B2 (en) 2003-07-03 2010-04-06 Sicpa Holding S.A. Method and means for producing a magnetically induced design in a coating containing magnetic particles
US7258915B2 (en) 2003-08-14 2007-08-21 Jds Uniphase Corporation Flake for covert security applications
WO2006061301A1 (fr) 2004-12-09 2006-06-15 Sicpa Holding S.A. Element de securite a aspect dependant de l'angle de vision
US8211531B2 (en) 2004-12-09 2012-07-03 Sicpa Holding Sa Security element having a viewing-angel dependent aspect
JP2008529823A (ja) * 2004-12-09 2008-08-07 シクパ・ホールディング・ソシエテ・アノニム 視野角依存性の外観をもつセキュリティエレメント
DE102005017544A1 (de) * 2005-04-16 2006-10-19 Balda Solutions Deutschland Gmbh Verfahren und Vorrichtung zur Herstellung eines Kunstoffbauteils
DE102005019919A1 (de) * 2005-04-27 2006-11-16 Leonhard Kurz Gmbh & Co. Kg Verfahren zur Erzeugung von Farbeffektbildern
US8263191B2 (en) 2005-04-27 2012-09-11 Leonhard Kurz Stiftung & Co. Kg Method for the creation of color effect images
WO2006114289A1 (fr) * 2005-04-27 2006-11-02 Leonhard Kurz Gmbh & Co. Kg Procede pour produire des elements createurs d'effet de couleurs
EP1787728A1 (fr) 2005-11-18 2007-05-23 JDS Uniphase Corporation Plaque magnétique pour imprimer des effets optiques
US7717038B2 (en) 2005-11-18 2010-05-18 Jds Uniphase Corporation Magnetic plate for printing of optical effects
WO2007089708A2 (fr) * 2006-02-01 2007-08-09 Basf Catalysts Llc article plastique comprenant des pigments magnétisables à effet orienté
WO2007089708A3 (fr) * 2006-02-01 2008-06-19 Basf Catalysts Llc article plastique comprenant des pigments magnétisables à effet orienté
US10343436B2 (en) 2006-02-27 2019-07-09 Viavi Solutions Inc. Security device formed by printing with special effect inks
US11504990B2 (en) 2006-02-27 2022-11-22 Viavi Solutions Inc. Security device formed by printing with special effect inks
US8246735B2 (en) 2006-05-12 2012-08-21 Sicpa Holding Sa Coating composition for producing magnetically induced images
US8303700B1 (en) 2006-05-12 2012-11-06 Sicpa Holding Sa Coating composition for producing magnetically induced
EP1908598A1 (fr) * 2006-10-04 2008-04-09 Sang Broli Company Limited Procédé et matériau pour la production de motifs imprimés avec effect tridimensionnel
US8557403B2 (en) 2006-10-17 2013-10-15 Sicpa Holding S.A. Method and means for magnetically transferring indicia to a coating composition applied on a substrate
WO2010115928A2 (fr) 2009-04-07 2010-10-14 Sicpa Holding Sa Element piézochrome de sécurité
WO2011012520A2 (fr) 2009-07-28 2011-02-03 Sicpa Holding Sa Feuille de transfert comprenant un pigment magnétique optiquement variable, procédé de fabrication, utilisation d’une feuille de transfert, et article ou document la comprenant
EP2314386A1 (fr) 2009-10-22 2011-04-27 manroland AG Dispositif et procédé de revêtement
US9216605B2 (en) 2010-03-03 2015-12-22 Sicpa Holding Sa Security thread or stripe comprising oriented magnetic particles in ink, and method and means for producing same
WO2011107527A1 (fr) 2010-03-03 2011-09-09 Sicpa Holding Sa Filet ou bande de sécurité comprenant des particules magnétiques orientées dans de l'encre et procédé et moyen permettant de produire le filet ou la bande de sécurité
US9102195B2 (en) 2012-01-12 2015-08-11 Jds Uniphase Corporation Article with curved patterns formed of aligned pigment flakes
US10259254B2 (en) 2012-01-12 2019-04-16 Viavi Solutions Inc. Article with a dynamic frame formed with aligned pigment flakes
US10752042B2 (en) 2012-01-12 2020-08-25 Viavi Solutions Inc. Article with dynamic frame formed with aligned pigment flakes
US10562333B2 (en) 2012-01-12 2020-02-18 Viavi Solutions Inc. Article with curved patterns formed of aligned pigment flakes
US10232660B2 (en) 2012-01-12 2019-03-19 Viavi Solutions Inc. Article with curved patterns formed of aligned pigment flakes
US11198315B2 (en) 2012-01-12 2021-12-14 Viavi Solutions Inc. Article with curved patterns formed of aligned pigment flakes
CN102642419A (zh) * 2012-04-11 2012-08-22 惠州市华阳光学技术有限公司 印刷磁定向母版及磁性颜料印刷品的制造方法及制造装置
CN102642419B (zh) * 2012-04-11 2014-10-08 惠州市华阳光学技术有限公司 印刷磁定向母版的制造方法
US9844969B2 (en) 2012-08-01 2017-12-19 Sicpa Holdings Sa Optically variable security threads and stripes
US9701152B2 (en) 2012-08-29 2017-07-11 Sicpa Holding Sa Optically variable security threads and stripes
WO2014086556A1 (fr) 2012-12-07 2014-06-12 Sicpa Holding Sa Compositions d'encre à séchage par oxydation
US9840632B2 (en) 2012-12-07 2017-12-12 Sicpa Holding Sa Oxidatively drying ink compositions
US10031269B2 (en) 2013-06-10 2018-07-24 Viavi Solutions Inc. Durable optical interference pigment with a bimetal core
US9482800B2 (en) 2013-06-10 2016-11-01 Viavi Solutions Inc. Durable optical interference pigment with a bimetal core
US10279618B2 (en) 2013-08-05 2019-05-07 Sicpa Holding Sa Magnetic or magnetisable pigment particles and optical effect layers
US10391519B2 (en) 2013-12-04 2019-08-27 Sicpa Holding Sa Devices for producing optical effect layers
WO2015086257A1 (fr) 2013-12-13 2015-06-18 Sicpa Holding Sa Procédé de production de couches à effets
US10933442B2 (en) 2013-12-13 2021-03-02 Sicpa Holding Sa Processes for producing effects layers
WO2016016028A1 (fr) 2014-07-30 2016-02-04 Sicpa Holding Sa Procédés commandés par courroie permettant de produire des couches à effet optique
US10500889B2 (en) 2014-07-30 2019-12-10 Sicpa Holding Sa Belt-driven processes for producing optical effect layers
US11065866B2 (en) 2014-08-22 2021-07-20 Sicpa Holding Sa Apparatuses for producing optical effect layers
WO2016026896A1 (fr) 2014-08-22 2016-02-25 Sicpa Holding Sa Appareil et procédé de production de couches à effet optique
EP3098086A1 (fr) * 2015-05-27 2016-11-30 Giesecke & Devrient GmbH Élement de securite piezochrome
EP3178569A1 (fr) * 2016-06-29 2017-06-14 Sicpa Holding Sa Procédés et dispositifs pour produire des couches à effet optique au moyen d'un photomasque
US10610888B2 (en) 2016-07-29 2020-04-07 Sicpa Holding Sa Processes for producing effect layers
WO2018019594A1 (fr) 2016-07-29 2018-02-01 Sicpa Holding Sa Procédés de production de couches à effet
US11707764B2 (en) 2016-08-16 2023-07-25 Sicpa Holding Sa Processes for producing effect layers
WO2018033512A1 (fr) 2016-08-16 2018-02-22 Sicpa Holding Sa Procédés de production de couches à effets
US11292027B2 (en) 2016-08-16 2022-04-05 Sicpa Holding Sa Processes for producing effect layers
US11193002B2 (en) 2016-08-31 2021-12-07 Viavi Solutions Inc. Orienting magnetically-orientable flakes
RU2718081C1 (ru) * 2016-08-31 2020-03-30 Виави Солюшнз Инк. Ориентирование магнитно-ориентируемых чешуек
WO2018045230A1 (fr) * 2016-08-31 2018-03-08 Viavi Solutions Inc. Orientation de flocons orientables magnétiquement
US11186110B2 (en) 2016-08-31 2021-11-30 Viavi Solutions Inc. Article with angled reflective segments
WO2018141547A1 (fr) 2017-01-31 2018-08-09 Sicpa Holding Sa Appareil et méthode de production de couches à effet optique
US11110487B2 (en) 2017-01-31 2021-09-07 Sicpa Holding Sa Apparatuses and methods for producing optical effect layers
EP3409379A1 (fr) * 2017-05-31 2018-12-05 Heinatz GmbH Dispositif d'impression magnétique, procédé de fabrication et utilisation
WO2019141453A1 (fr) 2018-01-17 2019-07-25 Sicpa Holding Sa Procédés de fabrication de couches à effet optique
US11772404B2 (en) 2018-01-17 2023-10-03 Sicpa Holding Sa Processes for producing optical effects layers
WO2019141452A1 (fr) 2018-01-17 2019-07-25 Sicpa Holding Sa Procédés de fabrication de couches à effet optique
US11691449B2 (en) 2018-01-17 2023-07-04 Sicpa Holding Sa Processes for producing optical effects layers
WO2019233625A1 (fr) 2018-06-05 2019-12-12 Giesecke+Devrient Currency Technology Gmbh Pigment à effet, encre d'impression, élément de sécurité, support de données et procédé de fabrication
WO2020025218A1 (fr) 2018-07-30 2020-02-06 Sicpa Holding Sa Procédés de production de couches à effets optiques
EP4230311A1 (fr) 2018-07-30 2023-08-23 Sicpa Holding SA Procédés de production de couches à effets optiques
US12020864B2 (en) 2018-07-30 2024-06-25 Sicpa Holding Sa Assemblies and processes for producing optical effect layers comprising oriented magnetic or magnetizable pigment particles
WO2020025482A1 (fr) 2018-07-30 2020-02-06 Sicpa Holding Sa Ensembles et procédés de production de couches à effet optique comprenant des particules de pigment orientées magnétiques ou magnétisables, non sphériques et aplaties
US11577273B2 (en) 2018-07-30 2023-02-14 Sicpa Holding Sa Processes for producing optical effects layers
US11823003B2 (en) 2019-02-28 2023-11-21 Sicpa Holding Sa Method for authenticating a magnetically induced mark with a portable device
WO2020173693A1 (fr) 2019-02-28 2020-09-03 Sicpa Holding Sa Procédé d'authentification d'une marque induite magnétiquement avec un dispositif portable
WO2021239607A1 (fr) 2020-05-26 2021-12-02 Sicpa Holding Sa Ensembles magnétiques et méthodes de production de couches à effet optique comprenant des particules de pigment magnétiques ou magnétisables lamelliformes orientées
WO2021259527A1 (fr) 2020-06-23 2021-12-30 Sicpa Holding Sa Procédés de production de couches à effet optique comprenant des particules pigmentaires magnétiques ou magnétisables
WO2022049025A1 (fr) 2020-09-02 2022-03-10 Sicpa Holding Sa Marquage de sécurité, procédé et dispositif de lecture du marquage de sécurité, document de sécurité marqué avec le marquage de sécurité, et procédé et système de vérification dudit document de sécurité
WO2022049024A1 (fr) 2020-09-02 2022-03-10 Sicpa Holding Sa Documents ou articles de sécurité comportant des couches à effet optique comprenant des particules de pigments magnétiques ou magnétisables et procédés de production desdites couches à effet optique
WO2022207692A1 (fr) 2021-03-31 2022-10-06 Sicpa Holding Sa Procédés de production de couches à effet optique comprenant des particules pigmentaires magnétiques ou magnétisables et présentant un ou plusieurs indices
WO2022258521A1 (fr) 2021-06-11 2022-12-15 Sicpa Holding Sa Couches à effet optique comprenant des particules de pigment magnétiques ou magnétisables et méthodes de production desdites couches à effet optique
WO2023161464A1 (fr) 2022-02-28 2023-08-31 Sicpa Holding Sa Procédés de production de couches à effet optique comprenant des particules pigmentaires magnétiques ou magnétisables et présentant un ou plusieurs indices
WO2024028408A1 (fr) 2022-08-05 2024-02-08 Sicpa Holding Sa Procédés de production de couches à effet optique comprenant des particules de pigment magnétiques ou magnétisables et présentant un ou plusieurs indices

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DE4439455A1 (de) 1996-05-09
CA2161816A1 (fr) 1996-05-05
FI955264A0 (fi) 1995-11-02

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