EP2562726B1 - Information carrier with an optically variable structure (variant embodiments) - Google Patents

Information carrier with an optically variable structure (variant embodiments) Download PDF

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Publication number
EP2562726B1
EP2562726B1 EP11814855.0A EP11814855A EP2562726B1 EP 2562726 B1 EP2562726 B1 EP 2562726B1 EP 11814855 A EP11814855 A EP 11814855A EP 2562726 B1 EP2562726 B1 EP 2562726B1
Authority
EP
European Patent Office
Prior art keywords
screen
lines
printed
dimensional
data carrier
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.)
Not-in-force
Application number
EP11814855.0A
Other languages
German (de)
French (fr)
Other versions
EP2562726A4 (en
EP2562726A1 (en
Inventor
Arkadiy Vladimirovich Trachuk
Andrey Valerievich Cheglakov
Andrey Borisovich Kuryatnikov
Alexandr Georgievich Pisarev
Alexandr Igorievich Mochalov
Igor Vasilievich Pavlov
Alexey Vitalievich Salunin
Andrey Vladislavovich Zhulbitsky
Konstantin Gennadievich Rybin
Elena Mikhailovna Fedorova
Anna Menashevna Rytikova
Vladimir Ivanovich Shapinov
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.)
Goznak JSC
Original Assignee
Goznak JSC
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
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Application filed by Goznak JSC filed Critical Goznak JSC
Publication of EP2562726A1 publication Critical patent/EP2562726A1/en
Publication of EP2562726A4 publication Critical patent/EP2562726A4/en
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Publication of EP2562726B1 publication Critical patent/EP2562726B1/en
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Classifications

    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
    • G07D7/06—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using wave or particle radiation
    • G07D7/12—Visible light, infrared or ultraviolet radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41D—APPARATUS FOR THE MECHANICAL REPRODUCTION OF PRINTING SURFACES FOR STEREOTYPE PRINTING; SHAPING ELASTIC OR DEFORMABLE MATERIAL TO FORM PRINTING SURFACES
    • B41D3/00—Casting stereotype plates; Machines, moulds, or devices therefor
    • B41D3/14—Details
    • 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
    • B41M3/148—Transitory images, i.e. images only visible from certain viewing angles
    • 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
    • B42D25/342—Moiré effects
    • B42D2035/16—
    • B42D2035/34—
    • 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
    • B42D25/324—Reliefs

Definitions

  • the invention relates to data carriers with an optically variable structure verifying the authenticity of the data carrier, comprising a coating made in the form of a printed screen, and a three-dimensional screen.
  • the optically variable structure is used as a feature testable by a person without aids, possibly alongside with other features for ascertaining the authenticity of the data carrier.
  • the invention is especially useful for the production of security papers.
  • Data carriers also include cards like those used for identifying persons or for carrying out transactions or services.
  • a bank note ( RU 2161092 C2 , B32B 29/02, 27.12.2000) comprises a printed pattern formed of parallel lines, and an additional embossed three-dimensional line structure. Owing to a specific mutual arrangement of the printed and three-dimensional structures, printed lines are visible when the carrier is viewed perpendicular to the surface and concealed when the carrier is viewed at a sharp angle.
  • a data carrier ( CA 1019012A , B32B 29/02, 11.10.1997) comprises an optically variable structure formed by a printed screen with equally spaced straight elements and a three-dimensional screen with equally spaced straight elements, the three-dimensional screen being arranged with respect to the printed screen in such a way that all printed information is visible when the data carrier is viewed perpendicular to the surface, and only the part which is not occluded by the three-dimensional screen is visible when the carrier is viewed at a sharp angle.
  • the object and technical advantages of the invention are attained owing to the provision of a dynamic effect that facilitates the authenticity control of the data carrier by an unskilled person.
  • the dynamic effect manifests itself in moving the borders of color stripes as the angle of viewing at the data carrier changes.
  • the invention involves a data carrier according to claim 1.
  • the moire pattern exhibits a reduced saturation and contrast because of the additional color.
  • the additional color gives rise to further reduction in the saturation on the carrier region with colored three-dimensional screen when the inclination angle of the information carrier is increased.
  • the width of lines and the distance between lines of the printed screen and the three-dimensional screen and the mutual orientation of the screens are selected to create an impression of moving borders of the color stripes on the carrier when the angle of viewing the data carrier is changed.
  • the moving image effect is provided by the fact that the border of two colors of the printed screen is mostly disposed on the inclined areas of the three-dimensional screen, and the visible surface area changes when the inclination angle of the carrier is changed.
  • the extreme position of the visible border between two colors of the printed screen shifts, whereby the impression is created that the border of adjacent colors is moving.
  • the moving impression is enhanced by coloring individual areas of the three-dimensional screen with translucent paints.
  • the printed and three-dimensional screens can be created by lines having the same and/or different width, interval, and spacing.
  • Lines of the screens can have various configurations (straight, curved, including concentric).
  • Lines of the screens can have the same or different width.
  • Lines of the screens can be arranged with the same or a different spacing.
  • Lines of the screens can be arranged with a constant or variable spacing.
  • Lines of the screens can have a constant or variable width.
  • Lines of the three-dimensional screen can have a constant and/or variable depth.
  • Lines of the printed screen can be implemented with uncolored gaps or without gaps.
  • Lines of the three-dimensional screen can be uncolored, colored with one or more colors.
  • Lines of the three-dimensional screen can be colored on the entire length and/or in individual areas.
  • Lines of the three-dimensional screen can have different profile, including asymmetric.
  • Figure 1 shows a schematic view of superimposition of a three-dimensional screen and a printed screen.
  • Printed screen 1 is formed by different color lines (1a and 1b).
  • Three-dimensional screen 2 consists of an uncolored region 2a and a region 2b with additionally colored areas. Parameters of the printed and three-dimensional screens are matched to create a moire pattern. When the carrier is viewed perpendicular to the surface the printed screen is fully visible in region 2a, and the field appears single-colored (the field color is formed by the combination of colors making the printed screen). In region 2b the colored areas of the three-dimensional screen occlude (fully or partially) areas of the printed screen and the moiré pattern is visible when the carrier is viewed perpendicular to the surface.
  • Figure 2 shows an image according to a first embodiment where the carrier is viewed at different inclination angles.
  • the carrier is tilted, due to the three-dimensional screen the viewer sees the part of the printed screen, which is disposed on the three-dimensional screen faces facing the viewer, whereby the moire pattern becomes visible.
  • a visible border 3 of the moire color stripes appears to move because of changes in the size of visible surface 4 of the three-dimensional screen faces.
  • Figure 3 shows an image according to a second embodiment where the carrier is viewed at different inclination angles.
  • the viewer sees the part of the printed screen, which is disposed on the three-dimensional screen faces facing the viewer.
  • the visible border 3 of the moire color stripe appears to move because of changes in the size of the visible surface 4 of the three-dimensional screen faces.
  • the presence of color on raised areas of the three-dimensional screen leads to reduction in the image contrast when the carrier is tilted and to merging the colored areas of the three-dimensional screen and to complete occlusion of the moiré pattern when the carrier is viewed at small angles.
  • Figures 4 and 5 illustrate the impact of additional coloring of the three-dimensional screen on the impression of moving borders of color stripes of the moire pattern.
  • Figures 6, 7 show a data carrier containing a region with additionally colored three-dimensional screen and a region with uncolored three-dimensional screen.
  • a moire pattern is visible in the region with additionally colored three-dimensional screen and invisible in the region with uncolored three-dimensional screen.
  • the carrier is tilted the moire pattern becomes visible in both regions of the carrier, and the moiré pattern in the region with colored three-dimensional screen spreads to the region with uncolored three-dimensional screen without shifting or tearing.
  • Figure 8 shows a profile and image according to the first embodiment with 2:1 ratio of periods of the printed screen and the three-dimensional screen when viewing the data carrier at different inclination angles.
  • the printed screen lines of two colors are disposed on similarly oriented areas of the three-dimensional screen; therefore the moiré stripe colors visible upon tilting are mixed.
  • Figure 9 shows a profile and image according to the first embodiment with an asymmetric profile of the three-dimensional screen when the carrier is viewed from different sides. Owing to different length of sides of the three-dimensional screen the colors of moire stripes viewed from the side of long faces are mixed, while the colors of moire stripes viewed from the side of short faces are clean.
  • Figures 10-11 show an image of the carrier according to the first embodiment visible at direct viewing of the carrier when the printed screen is used to form the image.
  • a moire pattern is superimposed on the image visible at direct viewing.
  • the invention provides a forgery-proof data carrier with an image that allows visual control even by an unskilled person.
  • the invention is suitable for the production of various types of security papers, as well as plastic cards and other data carriers protected from forgery.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Printing Methods (AREA)

Description

    Field of Technology
  • The invention relates to data carriers with an optically variable structure verifying the authenticity of the data carrier, comprising a coating made in the form of a printed screen, and a three-dimensional screen. The optically variable structure is used as a feature testable by a person without aids, possibly alongside with other features for ascertaining the authenticity of the data carrier. The invention is especially useful for the production of security papers. Data carriers also include cards like those used for identifying persons or for carrying out transactions or services.
    • Background Art
  • A bank note ( RU 2161092 C2 , B32B 29/02, 27.12.2000) comprises a printed pattern formed of parallel lines, and an additional embossed three-dimensional line structure. Owing to a specific mutual arrangement of the printed and three-dimensional structures, printed lines are visible when the carrier is viewed perpendicular to the surface and concealed when the carrier is viewed at a sharp angle.
  • A data carrier ( CA 1019012A , B32B 29/02, 11.10.1997) comprises an optically variable structure formed by a printed screen with equally spaced straight elements and a three-dimensional screen with equally spaced straight elements, the three-dimensional screen being arranged with respect to the printed screen in such a way that all printed information is visible when the data carrier is viewed perpendicular to the surface, and only the part which is not occluded by the three-dimensional screen is visible when the carrier is viewed at a sharp angle.
  • In a data carrier disclosed in RU 2235021 C2 , 27.08.2004, relative arrangement of a printed screen and a three-dimensional screen gives rise to appearance of a moire pattern in the form of color stripes blending smoothly into each other. This data carrier is the most pertinent prior art with respect to the present invention. The object of the present invention is to enhance the protection properties of the security feature with moire effect.
  • Document WO 2009/139 396 discloses a data carrier according to the preamble of claim 1.
    • Summary of the Invention
  • The object and technical advantages of the invention, in particular, the improved security feature with moire effect, are attained owing to the provision of a dynamic effect that facilitates the authenticity control of the data carrier by an unskilled person. The dynamic effect manifests itself in moving the borders of color stripes as the angle of viewing at the data carrier changes. The invention involves a data carrier according to claim 1.
  • On the areas with additionally colored three-dimensional screen the moire pattern exhibits a reduced saturation and contrast because of the additional color. The additional color gives rise to further reduction in the saturation on the carrier region with colored three-dimensional screen when the inclination angle of the information carrier is increased. Therewith, the width of lines and the distance between lines of the printed screen and the three-dimensional screen and the mutual orientation of the screens are selected to create an impression of moving borders of the color stripes on the carrier when the angle of viewing the data carrier is changed.
    The moving image effect is provided by the fact that the border of two colors of the printed screen is mostly disposed on the inclined areas of the three-dimensional screen, and the visible surface area changes when the inclination angle of the carrier is changed. Thus, upon changing the inclination angle of the carrier the extreme position of the visible border between two colors of the printed screen shifts, whereby the impression is created that the border of adjacent colors is moving. The moving impression is enhanced by coloring individual areas of the three-dimensional screen with translucent paints.
  • Depending on parameters of the printed and linear screens, their relationship, as well as the three-dimensional screen section profile (including asymmetric), various moiré patterns and further visual effects, including color-variable effects, can be created.
  • The printed and three-dimensional screens can be created by lines having the same and/or different width, interval, and spacing.
  • Lines of the screens can have various configurations (straight, curved, including concentric).
  • Lines of the screens can have the same or different width.
  • Lines of the screens can be arranged with the same or a different spacing.
  • Lines of the screens can be arranged with a constant or variable spacing.
  • Lines of the screens can have a constant or variable width.
  • Lines of the three-dimensional screen can have a constant and/or variable depth.
  • Lines of the printed screen can be implemented with uncolored gaps or without gaps.
  • Lines of the three-dimensional screen can be uncolored, colored with one or more colors.
  • Lines of the three-dimensional screen can be colored on the entire length and/or in individual areas.
  • Lines of the three-dimensional screen can have different profile, including asymmetric.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • In the following some embodiments of the invention will be explained with reference to the following figures.
    • Figure 1 shows a schematic view of superimposition of a three-dimensional screen and a printed screen according to first and second embodiments.
    • Figure 2 shows an image according to a first embodiment where the carrier is viewed at different inclination angles.
    • Figure 3 shows an image according to a second embodiment where the carrier is viewed at different inclination angles.
    • Figures 4, 5 illustrate the impact of additional coloring of the three-dimensional screen on the impression of moving borders of color stripes.
    • Figure 6 and 7 show an image according to a third embodiment where the carrier is viewed at different inclination angles.
    • Figures 8 to 11 show examples of various visual effects created by changing parameters of the printed and/or three-dimensional screen.
    Best Way of Implementing the Invention
  • Figure 1 shows a schematic view of superimposition of a three-dimensional screen and a printed screen. Printed screen 1 is formed by different color lines (1a and 1b). Three-dimensional screen 2 consists of an uncolored region 2a and a region 2b with additionally colored areas. Parameters of the printed and three-dimensional screens are matched to create a moire pattern. When the carrier is viewed perpendicular to the surface the printed screen is fully visible in region 2a, and the field appears single-colored (the field color is formed by the combination of colors making the printed screen). In region 2b the colored areas of the three-dimensional screen occlude (fully or partially) areas of the printed screen and the moiré pattern is visible when the carrier is viewed perpendicular to the surface.
  • Figure 2 shows an image according to a first embodiment where the carrier is viewed at different inclination angles. When the carrier is tilted, due to the three-dimensional screen the viewer sees the part of the printed screen, which is disposed on the three-dimensional screen faces facing the viewer, whereby the moire pattern becomes visible. Depending on the inclination angle of the carrier a visible border 3 of the moire color stripes appears to move because of changes in the size of visible surface 4 of the three-dimensional screen faces.
  • Figure 3 shows an image according to a second embodiment where the carrier is viewed at different inclination angles. When the data carrier is tilted, the viewer sees the part of the printed screen, which is disposed on the three-dimensional screen faces facing the viewer. Therewith, depending on the inclination angle of the carrier the visible border 3 of the moire color stripe appears to move because of changes in the size of the visible surface 4 of the three-dimensional screen faces. The presence of color on raised areas of the three-dimensional screen leads to reduction in the image contrast when the carrier is tilted and to merging the colored areas of the three-dimensional screen and to complete occlusion of the moiré pattern when the carrier is viewed at small angles.
  • Figures 4 and 5 illustrate the impact of additional coloring of the three-dimensional screen on the impression of moving borders of color stripes of the moire pattern.
  • When the carrier is tilted the thickness of paint layer 5, through which light passes to reach the printed screen, increases. As the additional paint layer absorbs light, border 6 of the area, in which the viewer discerns the color of the printed screen when the data carrier is viewed from different angles, changes to a greater extent than without coloring of the three-dimensional screen.
  • Figures 6, 7 show a data carrier containing a region with additionally colored three-dimensional screen and a region with uncolored three-dimensional screen. When the carrier is viewed perpendicular to the surface a moire pattern is visible in the region with additionally colored three-dimensional screen and invisible in the region with uncolored three-dimensional screen. When the carrier is tilted the moire pattern becomes visible in both regions of the carrier, and the moiré pattern in the region with colored three-dimensional screen spreads to the region with uncolored three-dimensional screen without shifting or tearing.
  • Figure 8 shows a profile and image according to the first embodiment with 2:1 ratio of periods of the printed screen and the three-dimensional screen when viewing the data carrier at different inclination angles. The printed screen lines of two colors are disposed on similarly oriented areas of the three-dimensional screen; therefore the moiré stripe colors visible upon tilting are mixed.
  • Figure 9 shows a profile and image according to the first embodiment with an asymmetric profile of the three-dimensional screen when the carrier is viewed from different sides. Owing to different length of sides of the three-dimensional screen the colors of moire stripes viewed from the side of long faces are mixed, while the colors of moire stripes viewed from the side of short faces are clean.
  • Figures 10-11 show an image of the carrier according to the first embodiment visible at direct viewing of the carrier when the printed screen is used to form the image. When the carrier is tilted, a moire pattern is superimposed on the image visible at direct viewing.
    • Industrial Applicability
  • The invention provides a forgery-proof data carrier with an image that allows visual control even by an unskilled person. The invention is suitable for the production of various types of security papers, as well as plastic cards and other data carriers protected from forgery.

Claims (10)

  1. A data carrier with an optically variable structure verifying the authenticity of the data carrier, comprising a coating made in the form of a printed screen, the printed screen consists of lines (1a, 1b) which are positioned adjacent each other, and a three-dimensional screen, wherein the width of lines and the distance between lines of the printed and three-dimensional screens and the mutual orientation of the screens are selected to create a moire image in the form of color stripes; characterized in that the printed screen consists of lines of different colors and in that three-dimensional screen consists of uncolored areas (2a) and colored areas (2b); when the carrier is viewed perpendicular to the surface of the carrier the moire image is recognizable on the colored areas of the three-dimensional screen and the moire image is unrecognizable on the uncolored areas of the three-dimensional screen; and when the carrier is inclined, the parts of the printed screen which are disposed on the faces of the three-dimensional screen facing the viewer and not occluded for the viewer by elements of the three-dimensional screen are visible, whereby the moire image becomes visible on the uncolored areas of the three-dimensional screen; the moire stripes on the colored areas of the three-dimensional screen blend without shifting into stripes of the moire image on the uncolored areas of the three-dimensional screen; when the inclination angle of the carrier is changed, the borders of color stripes of moire image appear to move on the colored areas of the three-dimensional screen on the carrier.
  2. A data carrier according to claim 1, wherein the printed screen is formed by lines creating an image visible at direct viewing of the product.
  3. A data carrier according to claim 1, wherein lines of the printed and three-dimensional screens have the same and/or different, and constant and/or variable width, interval and spacing.
  4. A data carrier according to claim 1, wherein lines of the printed and three-dimensional screens have various configurations including straight, curved and concentric.
  5. A data carrier according to claim 1, wherein lines of the three- dimensional screen have a constant and/or variable depth.
  6. A data carrier according to claim 1, wherein lines of the three- dimensional screen have various profiles, including asymmetric.
  7. A data carrier according to claim 1, wherein lines of the printed screen are implemented in one or more colors.
  8. A data carrier according to claim 1, wherein lines of the printed screen are implemented with uncolored gaps or without gaps.
  9. A data carrier according to claim 1, wherein parameters of the printed and three-dimensional screens create various moire patterns and further visual effects, including color-variable effects.
  10. A data carrier according to claim 1, wherein lines of the three-dimensional screen are colored in one or more colors.
EP11814855.0A 2010-08-03 2011-02-16 Information carrier with an optically variable structure (variant embodiments) Not-in-force EP2562726B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
RU2010132328/05A RU2440248C1 (en) 2010-08-03 2010-08-03 Data medium with optically variable structure (versions)
PCT/RU2011/000084 WO2012018278A1 (en) 2010-08-03 2011-02-16 Information carrier with an optically variable structure (variant embodiments)

Publications (3)

Publication Number Publication Date
EP2562726A1 EP2562726A1 (en) 2013-02-27
EP2562726A4 EP2562726A4 (en) 2014-03-12
EP2562726B1 true EP2562726B1 (en) 2017-03-29

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP11814855.0A Not-in-force EP2562726B1 (en) 2010-08-03 2011-02-16 Information carrier with an optically variable structure (variant embodiments)

Country Status (4)

Country Link
EP (1) EP2562726B1 (en)
CN (1) CN103140881B (en)
RU (1) RU2440248C1 (en)
WO (1) WO2012018278A1 (en)

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RU2516474C1 (en) 2013-04-09 2014-05-20 Федеральное Государственное Унитарное Предприятие "Гознак" (Фгуп "Гознак") Laminated article on paper or polymer substrate (versions) and method of its manufacturing
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RU2573879C2 (en) * 2014-03-18 2016-01-27 Федеральное Государственное Унитарное Предприятие "Гознак" (Фгуп "Гознак") Counterfeit-protected multilayer data medium
RU2557565C1 (en) * 2014-04-23 2015-07-27 Федеральное Государственное Унитарное Предприятие "Гознак" (Фгуп "Гознак") Multilayer counterfeit-proof article (versions) and valuable document based on it
DE102014018512A1 (en) 2014-12-12 2016-06-16 Giesecke & Devrient Gmbh Optically variable security element
RU2651339C1 (en) * 2017-04-12 2018-04-19 Акционерное общество "ГОЗНАК" Protected media with optically variable effect and method of protected media manufacturing
RU179220U1 (en) * 2017-08-25 2018-05-04 Акционерное общество "Гознак" (АО "Гознак") PROTECTED MULTILAYER MEDIA
RU2659989C1 (en) * 2017-08-25 2018-07-04 Акционерное общество "Гознак" (АО "Гознак") Protected information carrier with optically variable effect, and method of manufacturing protected information carrier with optically variable effect
RU2661222C1 (en) * 2017-08-25 2018-07-13 Акционерное общество "Гознак" (АО "Гознак") Protected carrier of information, with optically variable effect, and a method of protected media manufacturing with optically variable effect
RU2661591C1 (en) * 2017-09-27 2018-07-17 Павел Анатольевич Дмитриков Method for decoration and/or protection of printing products
PL234566B1 (en) * 2017-11-30 2020-03-31 Polska Wytwornia Papierow Wartosciowych Spolka Akcyjna Protective element with hidden image, a document protected and method for producing a protective element
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PL445989A1 (en) 2023-09-01 2025-03-03 Polska Wytwórnia Papierów Wartościowych Spółka Akcyjna Security element, data carrier and method of making the security element

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RU2440248C1 (en) 2012-01-20
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EP2562726A4 (en) 2014-03-12
CN103140881A (en) 2013-06-05
EP2562726A1 (en) 2013-02-27

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