EP2727741B1 - Valuable document with an optically variable structure (variants) - Google Patents

Valuable document with an optically variable structure (variants) Download PDF

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Publication number
EP2727741B1
EP2727741B1 EP12803793.4A EP12803793A EP2727741B1 EP 2727741 B1 EP2727741 B1 EP 2727741B1 EP 12803793 A EP12803793 A EP 12803793A EP 2727741 B1 EP2727741 B1 EP 2727741B1
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EP
European Patent Office
Prior art keywords
lines
raster
dimensional
document
printed
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.)
Active
Application number
EP12803793.4A
Other languages
German (de)
French (fr)
Other versions
EP2727741A4 (en
EP2727741A2 (en
Inventor
Arkadiy Vladimirovich Trachuk
Andrey Borisovich Kuryatnikov
Alexandr Georgievich Pisarev
Igor Vasilievich Pavlov
Aleksandr Igorievich Mochalov
Alexey Vitalevich Salunin
Anna Menashevna Rytikova
Vladimir Ivanovich Shapinov
Konstantin Gennadievich Rybin
Dmitry Petrovich BOLOTOV
Elena Mikhailovna Fedorova
Galina Sergeevna Baranova
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
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Filing date
Publication date
Application filed by Goznak JSC filed Critical Goznak JSC
Publication of EP2727741A2 publication Critical patent/EP2727741A2/en
Publication of EP2727741A4 publication Critical patent/EP2727741A4/en
Application granted granted Critical
Publication of EP2727741B1 publication Critical patent/EP2727741B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • G07D7/003—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 security elements
    • 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
    • B42D25/324—Reliefs
    • 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
    • B42D25/328—Diffraction gratings; Holograms
    • 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
    • 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
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • B42D25/378—Special inks
    • B42D25/382—Special inks absorbing or reflecting infrared light
    • 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
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • B42D25/378—Special inks
    • B42D25/387—Special inks absorbing or reflecting ultraviolet light
    • 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
    • G07D7/003—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 security elements
    • G07D7/0032—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 security elements using holograms

Definitions

  • the invention relates to a counterfeit- protected valuable document such as an information medium with an optically variable structure that attests to the authenticity of the medium, and is applicable in the production of banknotes and securities.
  • the medium can also refer to cards which are used for person identification or for committing transactions or services.
  • Optically variable structure is used as a feature that can be checked both without technical aids and using simple available means, if necessary, along with other features to verify the authenticity of a valuable document.
  • a conventional banknote ( RU 2161092 C2 , B32B 29/02, 27.12.2000) comprises a printed pattern formed by parallel lines and an additional embossed three-dimensional linear structure. Due to a certain mutual arrangement of the printed and three-dimensional structures the printed lines are visible when the banknote is viewed perpendicular to the surface and not visible when the document is viewed at an acute angle.
  • Another information medium ( CA 1019012 A , B32B 29/02, 11.10.1997) comprises an optically variable structure formed by a printed raster with straight equispaced elements and a three-dimensional raster with straight equispaced elements, the three-dimensional raster being positioned relative to the printed raster such that when the information medium is viewed perpendicularly to its surface all printed information is visible, while at an acute angle of view of the surface only that part which is not occluded by the three-dimensional raster can be seen.
  • RU 2249638 C1 discloses a method of manufacturing securities using a metallographic plate with asymmetrical line profile. However, the method is aimed at producing engraving lines that are coloured unevenly across the direction thereof. The method is not directed at embossing followed by formation of differently coloured moir fringes.
  • Patent application RU 2010132328 discloses an information medium comprising a printed raster and a three-dimensional raster, which are arranged so that to create a moir pattern in the form of smoothly blending coloured fringes, and the three-dimensional raster may contain areas made by bleached ink, thus when the angle of view of the valuable document changes the moir fringes seem to be moving.
  • CA 2 421 101 A1 discloses a data carrier with an optically variable structure comprising an embossed structure with symmetrical profile of lines and a coating that contrasts with the surface of the data support.
  • the embossed structure with the coating are combined in such a way that when the structure is viewed in a vertical position, at least parts of the coating are completely visible while when the structure is viewed at an angle, said parts are concealed, so that a tilting effect is produced when the structure is viewed alternately in the vertical position and at an angle.
  • the object of the invention is to improve the security properties of an optically variable feature which can be observed when the angle of inclination and/or the direction of viewing of a valuable document is changed, as a result of using at least partially asymmetric profile of a three-dimensional raster which causes disappearance and/or change of the colour gamut of the image of an area of the valuable document observed at the same angle but rotated 180 degrees.
  • the object of the invention is to improve an optically variable security feature as a result of the effect of changing the optical density or colour gamut of an area of a valuable document made with the use of a three-dimensional raster with at least partially asymmetrical profile of the line cross section, observed when the viewing direction of the valuable document is changed by 180 degrees without any change in the angle of inclination, thereby facilitating the check of the document authenticity by an untrained user.
  • the effect of changing the colour gamut comprises changing the colour of moir fringes or single-colour areas of the image when the viewing direction of the valuable document changes, the colour being changed under the CMY to RGB conversion model.
  • CY to RGB conversion refers to the effect of changing the colour gamut where pure colours (CMY) are replaced with mixed colours (RGB), that is cyan, magenta yellow are changed to red (as a mix of magenta and yellow), blue (as a mix of magenta and cyan), green (as a mix of blue and yellow).
  • the invention can be implemented in four embodiments.
  • a first embodiment of the invention can be characterized in that:
  • the effect of changing the colour gamut of moire fringes or single-colour areas of the image under the CMY to RGB model is ensured by the fact that the boundary of two or more colours of the printed raster is predominantly located on sloping areas of the three-dimensional raster having an asymmetrical section line profile, and when the viewing direction of the information medium changes without any change in the viewing angle the visible sloping surface area of the line of the three-dimensional raster changes as well.
  • two or more colours of the printed raster mix to create the impression of changing the colour gamut of moire fringes or one-colour areas according to the CMY to RGB model.
  • the angle between the direction of lines of the printed and three-dimensional rasters is from 0 to 45 degrees.
  • a valuable document is made on a paper base (3) and comprises a printed raster (1) made by offset printing and a three-dimensional raster (2) with an asymmetric line profile, which is applied by blind embossing using intaglio printing, lines of the three-dimensional raster being parallel to the printed raster lines.
  • the printed raster (1) comprises alternating, equispaced lines of three different colours - yellow, magenta, and blue, having a constant equal width.
  • the three-dimensional raster (2) comprises alternating asymmetrical profile lines which form a latent image as shown in Fig. 2 .
  • a valuable document is made on a paper base (7) and comprises a printed raster (5) made by three-colour offset printing and a three-dimensional linear raster (6) made by blind embossing using intaglio printing, lines of the three-dimensional raster being rotated relative coloured lines of the printed raster at the angle of 15 degrees.
  • the printed raster comprises alternating, equispaced lines of three different colours - yellow, magenta, and blue, having a constant equal width.
  • Line of each colour exhibits visible luminescence under UV radiation in the wavelength range of 330-370 nm, the luminescence colour being different for lines of each colour.
  • the three-dimensional raster comprises alternating lines of the same thickness, but the spacing between the lines is twice the width of the lines.
  • the three-dimensional raster is made partially with symmetrical profile lines (8), and partially with asymmetrical profile lines (9) which form a latent image as shown in Fig. 5
  • a valuable document is made on a plastic base (13) and comprises a printed raster (12) produced by three-colour offset printing and a three-dimensional linear raster (11) applied by blind embossing using intaglio printing on a transparent upper layer (10) applied over the printed raster, whose lines are rotated from the coloured lines of the printed raster at the angle of 10 degrees.
  • the printed raster comprises alternating equispaced lines of three different colours - yellow, magenta, and blue, having a constant equal width.
  • the three-dimensional raster comprises alternating lines of the same thickness, but the spacing between the lines is twice the width of the lines.
  • the three-dimensional raster is formed partially of symmetrical profile lines (14) and partially of asymmetrical profile lines (15) which form a latent image as shown in Fig. 8 .
  • a valuable document is made on a paper base (16) and comprises a printed raster (19) formed by two-colour offset printing, where the colours are similarly light gray, and a three-dimensional raster (17) applied by a blind embossing using intaglio printing, lines of the three-dimensional raster being rotated relative to the printed raster lines at an angle of 17 degrees.
  • the printed raster comprises alternating equispaced lines formed by two inks of the same gray colour, but having different UV and IR properties, having a constant equal width, and when viewed in ordinary light the raster is visually perceived as a single-colour area (11a)
  • the inks have different luminescence colour when exposed to UV radiation in the wavelength range of 330-370 nm, and different IR absorption properties in the wavelength range of 700-1100 nm.
  • the first ink fluoresces red under UV radiation, while the second ink fluoresces green.
  • the first ink has a broad absorption spectrum in the wavelength range of 700-1100 nm, while the second ink selectively absorbs in the range of 700-860 nm.
  • the three-dimensional raster comprises alternating lines having the same thickness, but the spacing between the lines is twice the width of the lines.
  • a part of the three-dimensional raster is formed with lines rotated 90 degrees (18), which form a latent image.
  • lines rotated 90 degrees (18) which form a latent image.
  • the invention provides a counterfeit-protected valuable document with an optically variable image, which makes it possible for an untrained user to carry out a visual authenticity check both without technical aids and using simple available means.

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  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Printing Methods (AREA)

Description

    FIELD OF THE INVENTION
  • The invention relates to a counterfeit- protected valuable document such as an information medium with an optically variable structure that attests to the authenticity of the medium, and is applicable in the production of banknotes and securities. The medium can also refer to cards which are used for person identification or for committing transactions or services.
  • Optically variable structure is used as a feature that can be checked both without technical aids and using simple available means, if necessary, along with other features to verify the authenticity of a valuable document.
    • BACKGROUND ART
  • A conventional banknote ( RU 2161092 C2 , B32B 29/02, 27.12.2000) comprises a printed pattern formed by parallel lines and an additional embossed three-dimensional linear structure. Due to a certain mutual arrangement of the printed and three-dimensional structures the printed lines are visible when the banknote is viewed perpendicular to the surface and not visible when the document is viewed at an acute angle.
  • Another information medium ( CA 1019012 A , B32B 29/02, 11.10.1997) comprises an optically variable structure formed by a printed raster with straight equispaced elements and a three-dimensional raster with straight equispaced elements, the three-dimensional raster being positioned relative to the printed raster such that when the information medium is viewed perpendicularly to its surface all printed information is visible, while at an acute angle of view of the surface only that part which is not occluded by the three-dimensional raster can be seen.
  • RU 2235021 C2, 27.08.2004 , teaches an information medium comprising a printed raster and a three-dimensional raster arranged so that to create moir in the form of smoothly blending colour fringes.
  • RU 2249638 C1 discloses a method of manufacturing securities using a metallographic plate with asymmetrical line profile. However, the method is aimed at producing engraving lines that are coloured unevenly across the direction thereof. The method is not directed at embossing followed by formation of differently coloured moir fringes.
  • Patent application RU 2010132328 , belonging to the present applicant, discloses an information medium comprising a printed raster and a three-dimensional raster, which are arranged so that to create a moir pattern in the form of smoothly blending coloured fringes, and the three-dimensional raster may contain areas made by bleached ink, thus when the angle of view of the valuable document changes the moir fringes seem to be moving.
  • CA 2 421 101 A1 , discloses a data carrier with an optically variable structure comprising an embossed structure with symmetrical profile of lines and a coating that contrasts with the surface of the data support. The embossed structure with the coating are combined in such a way that when the structure is viewed in a vertical position, at least parts of the coating are completely visible while when the structure is viewed at an angle, said parts are concealed, so that a tilting effect is produced when the structure is viewed alternately in the vertical position and at an angle.
    • SUMMARY OF THE INVENTION
  • The object of the invention is to improve the security properties of an optically variable feature which can be observed when the angle of inclination and/or the direction of viewing of a valuable document is changed, as a result of using at least partially asymmetric profile of a three-dimensional raster which causes disappearance and/or change of the colour gamut of the image of an area of the valuable document observed at the same angle but rotated 180 degrees.
  • The object of the invention is to improve an optically variable security feature as a result of the effect of changing the optical density or colour gamut of an area of a valuable document made with the use of a three-dimensional raster with at least partially asymmetrical profile of the line cross section, observed when the viewing direction of the valuable document is changed by 180 degrees without any change in the angle of inclination, thereby facilitating the check of the document authenticity by an untrained user.
  • The effect of changing the colour gamut comprises changing the colour of moir fringes or single-colour areas of the image when the viewing direction of the valuable document changes, the colour being changed under the CMY to RGB conversion model.
  • "CMY to RGB conversion" as used here refers to the effect of changing the colour gamut where pure colours (CMY) are replaced with mixed colours (RGB), that is cyan, magenta yellow are changed to red (as a mix of magenta and yellow), blue (as a mix of magenta and cyan), green (as a mix of blue and yellow).
  • The invention can be implemented in four embodiments.
  • The object of the invention is accomplished as described below.
  • According to a first embodiment, a valuable document with an optically variable structure that attests to the authenticity of the document comprises a coating in the form of a printed raster that is made up of at least one colour which is different from the colour of the main document, and a three-dimensional raster arranged relative to the coating so that the three-dimensional raster is at least partially disposed on the coating, is oriented substantially parallel to lines of the printed raster and together with the coating forms a latent image which is not discernible when the document is viewed at right angle to the surface; wherein at least a portion of lines of the three-dimensional raster has an asymmetric cross-section profile with an aspect ratio of not less than 1:1.25, so that when the viewing angle changes the latent image becomes visible in the form of coloured elements or a single-colour region, and when the viewing direction changes by 180 degrees without any change in the viewing angle the effect of changing the optical density or the colour gamut of at least a part of the latent image appears.
  • Additionally, a first embodiment of the invention can be characterized in that:
    • lines of the printed and three-dimensional rasters can have a constant and/or variable width, and a constant and/or variable spacing between adjacent lines;
    • lines of the printed and three-dimensional rasters can have various configurations (straight, curved, including concentric), and lines of the printed raster can further exhibit different absorption of optical radiation in the IR spectrum;
    • lines of the three-dimensional raster have a constant and/or variable depth and/or different asymmetrical cross-section line profile.
    • parameters of the printed and three-dimensional rasters further form different moire structures and/or visual effects, including latent and/or colour variable;
    • lines of the printed raster can further have different luminescence colour under UV and/or IR radiation;
    • lines of the printed raster can further exhibit different absorption of optical radiation in the IR spectrum.
  • According to a second embodiment, a valuable document with an optically variable structure that attests to the authenticity of the document comprises a coating in the form of a printed raster, and a three-dimensional raster arranged relative to the coating so that the three-dimensional raster is at least partially disposed on the coating, wherein at least a portion of lines of the three-dimensional raster has an asymmetric cross-section profile, and the width of lines and the spacing between lines of the printed and three-dimensional rasters and mutual orientation of the rasters are selected so that they form a latent image, and when the valuable document is viewed at an angle multi-colour moir fringes are observed and the latent image is not discernible; at least a portion of lines of the three-dimensional raster has an asymmetric cross-section profile with an aspect ratio of not less than 1:1.25, so that when the viewing direction changes by 180 degrees without any change in the viewing angle the latent image becomes visible against the background of multi-colour moir fringes owing to the change in the colour gamut of the coloured moir part lying in the area of the three-dimensional raster with asymmetric cross-section line profile.
  • The second embodiment can be further characterized in that:
    • lines of the printed and three-dimensional rasters can be differently oriented relative each other, have a constant and/or a variable width, and a constant and/or variable spacing between adjacent lines;
    • lines of the printed and three-dimensional rasters can have various configurations (straight, curved, including concentric);
    • lines of the three-dimensional raster can have a constant and/or variable depth and/or different asymmetrical cross-section line profile;
    • lines of the three-dimensional raster can be single- or multi-coloured;
    • lines of the three-dimensional raster can be coloured throughout the length and/or on separate areas;
    • parameters of the printed and three-dimensional rasters further form different moir structures and/or visual effects, including latent and/or colour variable;
    • the printed raster is formed of lines creating an image which is seen when the document is viewed at right angle;
    • lines of the printed raster can further have different luminescence colour under UV and/or IR radiation;
    • lines of the printed raster can further exhibit different absorption of optical radiation in the IR spectrum.
  • According to a third embodiment, a valuable document with an optically variable structure that attests to the authenticity of the document comprises a coating in the form of a printed raster, and a three-dimensional raster made on a transparent material and arranged relative to the coating so that the three-dimensional raster is at least partially disposed on the coating, the width of lines and the spacing between lines of the printed and three-dimensional rasters and mutual orientation of the rasters are selected such that coloured moire fringes are observed when the viewing angle changes; at least a portion of lines of the three-dimensional raster has an asymmetric cross-section profile with an aspect ratio of not less than 1:1.25 forming a latent image, so that when the viewing direction changes by 180 degrees without any change in the viewing angle the latent image becomes visible against the background of coloured moire fringes owing to a change in the colour gamut of the portion of moire fringes lying in the area of lines with asymmetric cross-section profile, and as the viewing angle is simultaneously changed boundaries of the coloured moire fringes seem to be moving.
  • The third embodiment can be further characterized in that:
    • lines of the printed and three-dimensional rasters can be differently oriented relative each other, have a constant and/or variable width, and a constant and/or variable spacing between adjacent lines;
    • lines of the printed and three-dimensional rasters can have various configurations (straight, curved, including concentric);
    • lines of the three-dimensional raster can have a constant and/or variable depth and/or different asymmetrical cross-section line profile;
    • parameters of the printed and three-dimensional rasters further form different moire structures and/or visual effects, including latent and/or colour variable;
    • lines of the printed raster can further have different luminescence colour under UV and/or IR radiation;
    • lines of the printed raster can further exhibit different absorption of optical radiation in the IR spectrum.
  • According to a fourth embodiment, a valuable document with an optically variable structure that attests to the authenticity of the document comprises a coating in the form of a printed raster including lines formed in at least two colours having indistinguishable (close) tints in the visible spectrum or by colorless inks distinguishable in the absorption of optical radiation in the IR spectrum and/or in the luminescence colour under UV and/or IR radiation, and a three-dimensional raster arranged relative to the coating so that the three-dimensional raster is at least partially disposed on the coating, the width of lines and the spacing between lines of the printed and three-dimensional rasters and mutual orientation of the rasters are selected such that they form a latent image which can be seen only when the valuable document is viewed under an UV illuminator and/or an IR visualizer; at least a portion of lines of the three-dimensional raster has an asymmetric cross-section profile with an aspect ratio of not less than 1:1.25, so that when the viewing angle of the valuable document changes single- or multi-colour moire fringes are observed, and when the viewing direction changes by 180 degrees without any change in the viewing angle the latent image becomes visible against the background of the single- or multi-colour moire fringes owing to the change in the optical density or the colour gamut of the portion of moire fringes lying in the area of the three-dimensional raster with asymmetric cross-section profile.
  • The fourth embodiment can be further characterized in that:
    • lines of the printed and three-dimensional rasters can be differently oriented relative each other, have a constant and/or a variable width, and a constant and/or variable spacing between adjacent lines;
    • lines of the printed and three-dimensional rasters can have various configurations (straight, curved, including concentric);
    • lines of the three-dimensional raster can have a constant and/or variable depth and/or different asymmetrical cross-section line profile;
    • parameters of the printed and three-dimensional rasters further form different moire structures and/or visual effects, including latent and/or colour-variable.
  • The effect of changing the colour gamut of moire fringes or single-colour areas of the image under the CMY to RGB model is ensured by the fact that the boundary of two or more colours of the printed raster is predominantly located on sloping areas of the three-dimensional raster having an asymmetrical section line profile, and when the viewing direction of the information medium changes without any change in the viewing angle the visible sloping surface area of the line of the three-dimensional raster changes as well. Thus, when the viewing direction of the medium changes, two or more colours of the printed raster mix to create the impression of changing the colour gamut of moire fringes or one-colour areas according to the CMY to RGB model. When individual areas of the three-dimensional raster are painted with translucent inks or the three-dimensional raster with an asymmetrical line is embossed on a transparent layer, moire fringes are observed at any viewing angle of the valuable document, and the impression of apparently moving moire fringes is intensified.
  • Various moire patterns and other visual including colour effects can be obtained depending on parameters of the printed and linear raster, their relationships, as well as profiles of symmetrical and asymmetrical cross-sections of the three-dimensional raster.
  • Preferably the angle between the direction of lines of the printed and three-dimensional rasters is from 0 to 45 degrees.
  • In an embodiment of a valuable document with small angles between the direction of the printed and three-dimensional rasters wide moire fringes are observed, this enabling the creation of a composite image, each part of which, for example, individual symbols or characters, when the medium is viewed at different angles and different directions, will completely have its own independent colour, also varying according to the CMY to RGB model when the viewing direction of the valuable document changes by 180 degrees.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • The invention is illustrated by the following drawings.
    • FIG. 1 is a side view of superimposition of a three-dimensional and printed raster according to a first embodiment of the invention.
    • FIG 2 is a top view of superimposition of a three-dimensional and printed raster according to a first embodiment of the invention.
    • FIG. 3 (3a-3d) shows an image according to a first embodiment when the document is viewed at different angles of inclination and rotated 180 degrees, where 3a shows the view of the document at the right angle of observation; 3b shows the view of the document when the viewing angle of the document changes in the plane perpendicular to the direction of lines of the three- dimensional raster; 3c shows the view of the document at the same angle, but rotated 180 degrees; 3d shows the view of the document when the viewing angle changes in a plane parallel to the direction of lines of the three-dimensional raster.
    • FIG. 4 is a side view of superimposition of a three-dimensional and printed raster according to a second embodiment of the invention.
    • FIG. 5 is a top view of superimposition of a three-dimensional and printed raster according to a second embodiment of the invention.
    • FIG. 6 shows an image according to a second embodiment, when the document is viewed at an angle of inclination and rotated 180 degrees, where 6a shows the view of the document at the right angle of view; 6b shows the view of moire fringes when the document is viewed from one side; 6c shows the view of moire fringes and a latent element when the document is viewed rotated 180 degrees relative to 6b.
    • FIG. 7 is a side view of superimposition of a three-dimensional and printed raster according to a third embodiment of the invention.
    • FIG. 8 is a top view of superimposition of a three-dimensional and printed raster according to a third embodiment of the invention.
    • FIG. 9 shows an image according to a third embodiment when the document is viewed at different angles of inclination and rotated 180 degrees, where 9a shows the view of moire fringes when the document is viewed from one side; 9b shows the view of moire fringes and a latent element when the document is viewed rotated 180 degrees; 9c shows moving moire fringes when the document is inclined relative to 9a; 9d shows moving moire fringes when the document is inclined relative to 9b.
    • FIG. 10 is a top view of superimposition of a three-dimensional and printed raster according to a fourth embodiment of the invention.
    • FIG. 11 shows an image according to a fourth embodiment when the document is viewed under ordinary light, under UV radiation, and as seen in an IR visualizer, where 11a shows the document under ordinary light at any angle of inclination and at right angle under UV radiation or in an IR visualizer; 11b shows the view of moire fringes under UV radiation when the document is viewed at an angle; 11c shows the view of moire fringes and a latent element under UV radiation and rotated 180 degrees; 11d shows the view of moire fringes when the document viewed in an IR visualizer at an angle; 11e shows the view of moire fringes and a latent element when the document is viewed in an IR visualizer rotated 180 degrees.
    BEST EMBODIMENT OF THE INVENTION
  • The invention will be further illustrated by following examples.
    • Example 1 (Figs. 1, 2 and 3)
  • A valuable document, as shown in Fig. 1, is made on a paper base (3) and comprises a printed raster (1) made by offset printing and a three-dimensional raster (2) with an asymmetric line profile, which is applied by blind embossing using intaglio printing, lines of the three-dimensional raster being parallel to the printed raster lines. The printed raster (1) comprises alternating, equispaced lines of three different colours - yellow, magenta, and blue, having a constant equal width. The three-dimensional raster (2) comprises alternating asymmetrical profile lines which form a latent image as shown in Fig. 2.
  • When the document is observed at right angle a uniformly coloured field (3a) can be seen. As the viewing angle of the document changes in the plane perpendicular to the direction of lines of the three-dimensional raster (3b) at an angle, latent elements having colours of the printed raster lines become visible. When the document is rotated by 180 degrees (3c) latent elements having mixed colours become visible owing to a change in the image colour gamut (orange, green, purple). When the document is viewed at an angle in a plane parallel to the direction of lines of the three-dimensional raster (3d), an additional latent element (4) can be seen.
    • Example 2 (Figs. 4, 5 and 6)
  • A valuable document, as shown in Figs. 4, 5, is made on a paper base (7) and comprises a printed raster (5) made by three-colour offset printing and a three-dimensional linear raster (6) made by blind embossing using intaglio printing, lines of the three-dimensional raster being rotated relative coloured lines of the printed raster at the angle of 15 degrees.
  • The printed raster comprises alternating, equispaced lines of three different colours - yellow, magenta, and blue, having a constant equal width. Line of each colour exhibits visible luminescence under UV radiation in the wavelength range of 330-370 nm, the luminescence colour being different for lines of each colour.
  • The three-dimensional raster comprises alternating lines of the same thickness, but the spacing between the lines is twice the width of the lines.
  • The three-dimensional raster is made partially with symmetrical profile lines (8), and partially with asymmetrical profile lines (9) which form a latent image as shown in Fig. 5
  • When the document is observed at right angle a single- colour area (6a) is observed. As the viewing angle of the document (6b) changes yellow, blue, purple moire fringes can be seen. When the document is rotated 180 degrees (6c) a latent image formed in the area of the three-dimensional raster with asymmetrical line profile becomes visible owing to the change in the moire image colour gamut to orange, green, purple.
  • When the document is observed under an UV source with a wavelength range of 330 - 370 nm a pattern of coloured moire fringes is observed as a result of the change in the luminescence colour. Visual effect of observation of the latent image is similar to that described above.
    • Example 3 (Figs. 7, 8 and 9)
  • A valuable document, as shown in Fig. 7, is made on a plastic base (13) and comprises a printed raster (12) produced by three-colour offset printing and a three-dimensional linear raster (11) applied by blind embossing using intaglio printing on a transparent upper layer (10) applied over the printed raster, whose lines are rotated from the coloured lines of the printed raster at the angle of 10 degrees. The printed raster comprises alternating equispaced lines of three different colours - yellow, magenta, and blue, having a constant equal width. The three-dimensional raster comprises alternating lines of the same thickness, but the spacing between the lines is twice the width of the lines. The three-dimensional raster is formed partially of symmetrical profile lines (14) and partially of asymmetrical profile lines (15) which form a latent image as shown in Fig. 8.
  • When the document is observed at an angle in a plane perpendicular to the direction of the three-dimensional raster lines (9a) yellow, blue, purple moire fringes can be seen. When the document (9c) is inclined relative to the position (9a) the moire fringes seem to be moving in the transverse direction. When the document is rotated 180 degrees (9b) a latent image formed in the area of three-dimensional raster with asymmetrical line profile becomes visible as a result of changing the colour gamut of moire fringe image to orange, green, purple, and when the document (9d) is inclined the moire fringes also seem to be moving in the transverse direction.
    • Example 4 (Figs. 10 and 11)
  • A valuable document, as shown in Figs. 10 and 11, is made on a paper base (16) and comprises a printed raster (19) formed by two-colour offset printing, where the colours are similarly light gray, and a three-dimensional raster (17) applied by a blind embossing using intaglio printing, lines of the three-dimensional raster being rotated relative to the printed raster lines at an angle of 17 degrees. The printed raster comprises alternating equispaced lines formed by two inks of the same gray colour, but having different UV and IR properties, having a constant equal width, and when viewed in ordinary light the raster is visually perceived as a single-colour area (11a) The inks have different luminescence colour when exposed to UV radiation in the wavelength range of 330-370 nm, and different IR absorption properties in the wavelength range of 700-1100 nm. The first ink fluoresces red under UV radiation, while the second ink fluoresces green. The first ink has a broad absorption spectrum in the wavelength range of 700-1100 nm, while the second ink selectively absorbs in the range of 700-860 nm.
  • The three-dimensional raster comprises alternating lines having the same thickness, but the spacing between the lines is twice the width of the lines.
  • A part of the three-dimensional raster is formed with lines rotated 90 degrees (18), which form a latent image. When the document is viewed at any angle in ordinary light a single-colour light gray image pixel is observed in the area of the security feature (11c, 11e).
  • When the document is observed at right angle under UV light of 365 nm, a luminous yellow image element is observed in the region of the security feature. When the document is observed at an angle (11b) alternating green and red moire stripes are observed in the field of the security feature. When the document is rotated 180 degrees (11c) a latent image can be seen as a result of the fact that there are no moire fringes in the latent element region.
  • When the document is viewed in an IR visualizer at right angle a monochromatic gray area is observed. When the document is observed at an angle in the IR visualizer in the range of 810 nm (11d) alternating dark Moire fringes are visible. When the document is rotated 180 degrees (11e) the latent image becomes visible due to the fact that there are no moire fringes in the latent element.
  • When the document is viewed at an angle in the IR visualizer in the range of 940 nm a dark region is visible without moire fringes.
    • Industrial Applicability
  • The invention provides a counterfeit-protected valuable document with an optically variable image, which makes it possible for an untrained user to carry out a visual authenticity check both without technical aids and using simple available means.

Claims (19)

  1. A valuable document with an optically variable structure that attests to the authenticity of the document, comprising a coating in the form of a printed raster (1), comprising alternating lines of at least two different colours, wherein at least one colour of the printed raster line is different from the colour of the document base (3), and a three-dimensional raster (2), wherein at least a portion of lines of the three-dimensional raster has an asymmetric cross-section profile with an aspect ratio of not less than 1: 1.25, and the three-dimensional raster is arranged relative to the coating so that the three-dimensional raster is at least partially disposed on the coating, is oriented substantially parallel to lines of the printed raster and together with the coating forms a latent image which is not discernible when the document is viewed at right angle to the surface a uniformly colored area (3a) is observed; so that
    when the viewing angle of the document in the plane perpendicular to the direction of lines of the three-dimensional raster changes the latent image becomes visible in the form of coloured elements or a single-colour region in the area of the three-dimensional raster, and when the viewing direction changes by 180 degrees without any change in the viewing angle the effect of changing the optical density or the colour gamut of at least a part of the latent image appears, wherein effect of changing the color gamut represents changing the colors in CMY color system to RGB color system, when the viewing angle of the document in the plane parallel to the direction of lines of three-dimensional raster changes the additional latent element (4) is observed.
  2. A valuable document with an optically variable structure that attests to the authenticity of the document according to claim 1, wherein lines of the printed and three-dimensional rasters have a constant and/or variable width, and a constant and/or variable spacing between adjacent lines and/or lines of the three-dimensional raster have a constant and/or variable depth and/or different asymmetrical cross-section line profile.
  3. A valuable document with an optically variable structure that attests to the authenticity of the document according to claim 1, wherein lines of the printed and three-dimensional rasters can have various configurations including straight, curved and concentric, and lines of the printed raster can further exhibit different absorption of optical radiation in the IR spectrum and/or lines of the printed raster can further have different luminescence colour under UV and/or IR radiation.
  4. A valuable document with an optically variable structure that attests to the authenticity of the document according to claim 1, wherein parameters of the printed and three-dimensional rasters further form different visual effects, including latent and/or colour variable.
  5. A valuable document with an optically variable structure that attests to the authenticity of the document, comprising a coating in the form of a printed raster(5),comprising alternating lines of at least two different colours, wherein at least one colour of the printed raster line is different from the colour of the document base (7) and a three-dimensional raster (6) arranged relative to the coating so that the three-dimensional raster is at least partially disposed on the coating, wherein at least a portion of lines of the three-dimensional raster (6) has an asymmetric cross-section profile, and the width of lines and the spacing between lines of the printed and three-dimensional rasters and the mutual orientation of the rasters are selected so that they form a latent image, and when the valuable document is viewed at an angle multi-colour moire fringes are observed and the latent image is not discernible; at least a portion of lines of the three-dimensional raster has an asymmetric cross-section profile with an aspect ratio of not less than 1: 1.25, so that
    when the viewing direction changes by 180 degrees without any change in the viewing angle the latent image becomes visible against the background of multi-colour moire fringes owing to a change in the colour gamut of the coloured moire part lying in the region of the three-dimensional raster with asymmetric cross-section line profile, wherein effect of changing the color gamut represents changing the colors in CMY color system to RGB color system.
  6. A valuable document with an optically variable structure that attests to the authenticity of the document according to claim 5, wherein lines of the printed and three-dimensional rasters are differently oriented relative each other, have a constant and/or a variable width, and a constant and/or variable spacing between adjacent lines and/or lines of the three-dimensional raster have a constant and/or variable depth and/or different asymmetrical cross-section line profile.
  7. A valuable document with an optically variable structure that attests to the authenticity of the document according to claim 5, wherein lines of the printed and three-dimensional rasters have various configurations, such as straight, curved, including concentric, and/or lines of the three-dimensional raster are single-or multi-coloured throughout the length and/or on separate areas.
  8. A valuable document with an optically variable structure that attests to the authenticity of the document according to claim 5, wherein parameters of the printed and three-dimensional rasters further form different moire structures and/or visual effects, including latent and/or colour variable.
  9. A valuable document with an optically variable structure that attests to the authenticity of the document according to claim 5, wherein the printed raster is formed of lines creating an image which is seen when the document is viewed at right angle.
  10. A valuable document with an optically variable structure that attests to the authenticity of the document according to claim 5, wherein lines of the printed raster further have different luminescence colour under UV and/or IR radiation and/or lines of the printed raster further exhibit different absorption of optical radiation in the IR spectrum.
  11. A valuable document with an optically variable structure that attests to the authenticity of the document, comprising a coating in the form of a printed raster(12), comprising alternating lines of at least two different colours, wherein at least one colour of the printed raster line is different from the colour of the document base (13), and a three-dimensional raster (11) made on a transparent material (10) and arranged relative to the coating so that the three-dimensional raster (11) is at least partially disposed on the coating, the width of lines and the spacing between lines of the printed and three-dimensional rasters and the mutual orientation of the rasters are selected such that coloured moire fringes are observed when the viewing angle changes; at least a portion of lines of the three-dimensional raster has an asymmetric cross-section profile with an aspect ratio of not less than 1: 1.25 forming a latent image, so that when the viewing direction changes by 180 degrees without any change in the viewing angle the latent image becomes visible against the background of coloured moire fringes owing to a change in the colour gamut of the portion of moire fringes lying in the region of lines with asymmetric cross-section profile, and as the viewing angle is simultaneously changed boundaries of the coloured moire fringes seem to be moving, wherein effect of changing the color gamut represents changing the colors in CMY color system to RGB color system.
  12. A valuable document with an optically variable structure that attests to the authenticity of the document according to claim 11, wherein lines of the printed and three-dimensional rasters are differently oriented relative each other, have a constant and/or variable width, and a constant and/or variable spacing between adjacent lines and/or lines of the three-dimensional raster have a constant and/or variable depth and/or different asymmetrical cross-section line profile.
  13. A valuable document with an optically variable structure that attests to the authenticity of the document according to claim 11, wherein lines of the printed and three-dimensional rasters have various configurations, such as straight, curved, including concentric.
  14. A valuable document with an optically variable structure that attests to the authenticity of the document according to claim 11, wherein parameters of the printed and three-dimensional rasters further form different moire structures and/or visual effects, including latent and/or colour variable.
  15. A valuable document with an optically variable structure that attests to the authenticity of the document according to claim 11, wherein lines of the printed raster further have different luminescence colour under UV and/or IR radiation and/or lines of the printed raster further exhibit different absorption of optical radiation in the IR spectrum.
  16. A valuable document with an optically variable structure that attests to the authenticity of the document, comprising a coating in the form of a printed raster (19) including alternating lines formed in at least two colours having indistinguishable tints in the visible spectrum or by colorless inks distinguishable in the absorption of optical radiation in the IR spectrum and/or in the luminescence colour under UV and/or IR radiation, and a three-dimensional raster (17) arranged relative to the coating so that the three-dimensional raster (17) is at least partially disposed on the coating, the width of lines and the spacing between lines of the printed and three-dimensional rasters and the mutual orientation of the rasters are selected such that they form a latent image which can be seen only when the valuable document is viewed under an UV illuminator and/or in an IR visualizer; at least a portion of lines of the three-dimensional raster has an asymmetric cross-section profile with an aspect ratio of not less than 1: 1.25, so that
    when the viewing angle of the valuable document changes multi-colour moire fringes are observed, and when the viewing direction changes by 180 degrees without any change in the viewing angle the latent image becomes visible against the background of the single- or multi-colour moire fringes owing to a change in the optical density or the colour gamut of the portion of moiré fringes lying in the region of the three-dimensional raster with asymmetric cross-section profile, wherein effect of changing the color gamut represents changing the colors in CMY color system to RGB color system.
  17. A valuable document with an optically variable structure that attests to the authenticity of the document according to claim 16, wherein lines of the printed and three-dimensional rasters are differently oriented relative each other, have a constant and/or a variable width, and a constant and/or variable spacing between adjacent lines and/or lines of the three-dimensional raster have a constant and/or variable depth and/or different asymmetrical cross-section line profile.
  18. A valuable document with an optically variable structure that attests to the authenticity of the document according to claim 16, wherein lines of the printed and three-dimensional rasters can have various configurations, such as straight, curved, including concentric.
  19. A valuable document with an optically variable structure that attests to the authenticity of the document according to claim 16, wherein parameters of the printed and three-dimensional rasters further form different moire structures and/or visual effects, including latent and/or colour-variable.
EP12803793.4A 2011-06-30 2012-06-22 Valuable document with an optically variable structure (variants) Active EP2727741B1 (en)

Applications Claiming Priority (2)

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RU2011126649/12A RU2467879C1 (en) 2011-06-30 2011-06-30 Valuable document with optically variable structure (versions)
PCT/RU2012/000492 WO2013002680A2 (en) 2011-06-30 2012-06-22 Valuable document with an optically variable structure (variants)

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EP2727741A2 EP2727741A2 (en) 2014-05-07
EP2727741A4 EP2727741A4 (en) 2015-05-27
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CN103764403A (en) 2014-04-30
RU2467879C1 (en) 2012-11-27
CO6920269A2 (en) 2014-04-10
CN103764403B (en) 2016-02-03
EP2727741A4 (en) 2015-05-27
WO2013002680A3 (en) 2013-03-14
WO2013002680A2 (en) 2013-01-03
EP2727741A2 (en) 2014-05-07

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