CA2907989A1 - Security element, production method, data carrier equipped with the security element and method for checking the authenticity - Google Patents
Security element, production method, data carrier equipped with the security element and method for checking the authenticityInfo
- Publication number
- CA2907989A1 CA2907989A1 CA2907989A CA2907989A CA2907989A1 CA 2907989 A1 CA2907989 A1 CA 2907989A1 CA 2907989 A CA2907989 A CA 2907989A CA 2907989 A CA2907989 A CA 2907989A CA 2907989 A1 CA2907989 A1 CA 2907989A1
- Authority
- CA
- Canada
- Prior art keywords
- light
- color
- illumination
- visible
- color layer
- 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.)
- Abandoned
Links
- 238000000034 method Methods 0.000 title claims description 15
- 238000004519 manufacturing process Methods 0.000 title claims description 11
- 238000005286 illumination Methods 0.000 claims abstract description 48
- 238000007639 printing Methods 0.000 claims abstract description 38
- 239000000758 substrate Substances 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims description 42
- 238000005516 engineering process Methods 0.000 claims description 17
- 238000009281 ultraviolet germicidal irradiation Methods 0.000 claims description 12
- 230000003247 decreasing effect Effects 0.000 claims description 4
- 239000000049 pigment Substances 0.000 claims description 4
- 230000000306 recurrent effect Effects 0.000 claims description 3
- 238000007641 inkjet printing Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 19
- 239000003086 colorant Substances 0.000 description 10
- DGOBMKYRQHEFGQ-UHFFFAOYSA-L acid green 5 Chemical compound [Na+].[Na+].C=1C=C(C(=C2C=CC(C=C2)=[N+](CC)CC=2C=C(C=CC=2)S([O-])(=O)=O)C=2C=CC(=CC=2)S([O-])(=O)=O)C=CC=1N(CC)CC1=CC=CC(S([O-])(=O)=O)=C1 DGOBMKYRQHEFGQ-UHFFFAOYSA-L 0.000 description 8
- 239000000976 ink Substances 0.000 description 8
- 235000019646 color tone Nutrition 0.000 description 4
- 230000000737 periodic effect Effects 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 239000000969 carrier Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000008846 dynamic interplay Effects 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000007650 screen-printing Methods 0.000 description 2
- 241000533901 Narcissus papyraceus Species 0.000 description 1
- 229920001131 Pulp (paper) Polymers 0.000 description 1
- -1 bank notes Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000007850 fluorescent dye Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 238000007645 offset printing Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000001850 reproductive effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
-
- 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
- B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
- B42D25/29—Securities; Bank notes
-
- 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
- B42D25/355—Security threads
-
- 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
- G07D7/128—Viewing devices
-
- B42D2035/20—
-
- 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
Abstract
The invention relates to a security element for a data carrier, in particular a valuable document, comprising a carrier substrate, the front side of which comprises a macroscopic motif composed of a multiplicity of microscopic individual elements, wherein: the microscopic individual elements each contain at least three neighbouring regions generated by printing, which regions are designed in such a way that the observer perceives a so-called first bright-medium-dark contrast within each individual element under first observation conditions, a substantially uniform brightness within each individual element under second observation conditions and a so-called second bright-medium-dark contrast within each individual element under third observation conditions, which second bright-medium-dark contrast is inverted compared to the first bright-medium-dark contrast; and the microscopic individual elements cause a dynamic impression of the macroscopic motif for the observer in the case of an oscillating change between the first and the third observation conditions and the first, second and third observation conditions are defined as follows: first observation conditions: observation under illumination with visible light; second observation conditions: observation under illumination with a combination of visible light and ultraviolet light with substantially the same proportions; third observation conditions: observation under illumination with ultraviolet light.
Description
Security element, production method, data carrier equipped with the security element and method for checking the authenticity [0001] This invention concerns a security element for data carriers, in particular for value documents, identity documents and the like. The invention furthermore concerns a data carrier equipped with the security element, a method for checking the authenticity of the data carrier, and a method for manufacturing the security element.
[0002] For protection against imitation, in particular with color copiers or other reproductive methods, data carriers, such as bank notes, papers of value, credit cards, identity documents, passports, deeds and the like, labels, packages or other elements for product authentication are equipped with luminescent security elements. These include fluorescent fibers or planchets (small colored disks) which are mixed into the paper pulp as a security feature during paper manufacture. Furthermore, there are employed fluorescent security threads made of plastic, metal or another material which are embedded wholly or partly into the paper during paper manufacture. It is also known to employ fluorescent imprints which are invisible or colorless in normal light but fluoresce under UV light.
Fluorescence is understood in general to be a short-lived light emission ending within 10-8 seconds. Instead of fluorescent printing inks there are also employed phosphorescent or photochromic printing inks. With phosphorescent materials, the luminous effect continues from 10-8 seconds up to several seconds or hours after the end of irradiation, depending on the material. Photochromic printing ink changes its color upon excitation with UV light. When the UV light source is removed, the color change continues for a time before the color changes back to the original state again. A special case of a photochromic printing ink is iridescent photochromic printing ink. Iridescent or pearl-effect inks contain transparent pigments consisting of tiny mica flakes covered with thin foil. They cause an interference of the irradiating light. This gives rise to lustrous, pearl-like shimmering effects with a color-tone change at different viewing angles or illumination angles.
Fluorescence is understood in general to be a short-lived light emission ending within 10-8 seconds. Instead of fluorescent printing inks there are also employed phosphorescent or photochromic printing inks. With phosphorescent materials, the luminous effect continues from 10-8 seconds up to several seconds or hours after the end of irradiation, depending on the material. Photochromic printing ink changes its color upon excitation with UV light. When the UV light source is removed, the color change continues for a time before the color changes back to the original state again. A special case of a photochromic printing ink is iridescent photochromic printing ink. Iridescent or pearl-effect inks contain transparent pigments consisting of tiny mica flakes covered with thin foil. They cause an interference of the irradiating light. This gives rise to lustrous, pearl-like shimmering effects with a color-tone change at different viewing angles or illumination angles.
[0003] From EP 1 567 358 B1 there is known a luminescent security element for securing bank notes which has two or more regions, of which each region contains a material or a combination of materials, with the two or more regions showing substantially the same visible color under first viewing conditions which comprise visible light, and different visible colors under second viewing conditions, with the second viewing conditions comprising a combination of visible light and UV light (see claim 1 of EP 1 567 358 B1). Further, there is known from EP 1 567 358 B1 a luminescent security element for securing bank notes which has two or more regions, of which each region contains a material or a combination of materials, with the two or more regions showing different visible colors under first viewing conditions which comprise visible light, and substantially the same visible colors under second viewing conditions, with the second viewing conditions comprising a combination of visible light and UV
light (see claim 2 of EP 1 567 358 B1).
light (see claim 2 of EP 1 567 358 B1).
[0004] Starting out from the above prior art, the present invention is based on the object of providing a security element of the type stated at the outset which offers an elevated measure of anti-forgery security and at the same time can be checked for authenticity in a simple manner. Furthermore, there are to be provided a data carrier having such a security element and a method for manufacturing such a security element.
[0005] This object is achieved by the security element defined in the main claim. A method for manufacturing the same, a data carrier having such a security element and a method for checking the authenticity of the data carrier are defined in the equal-ranking claims. Developments of the invention are the subject matter of the subclaims.
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Summary of the invention 1. (First aspect) A security element for a data carrier, in particular a value document, comprising a carrier substrate whose front side has a macroscopic motif composed of a multiplicity of microscopic single elements, wherein:
the microscopic single elements respectively contain at least three, in particular four, neighboring regions produced by printing technology which are so constituted that the viewer perceives a so-called first light/medium/dark contrast within each single element under first viewing conditions, perceives a substantially uniform lightness within each single element under second viewing conditions, and perceives a so-called second light/medium/dark contrast which is inverted compared to the first light/medium/dark contrast within each single element under third viewing conditions; and the microscopic single elements arouse in the viewer a dynamic impression of the macroscopic motif upon an oscillating change between the first and the third viewing conditions, and the first, second and third viewing conditions are defined as follows:
first viewing conditions: viewing upon illumination with visible light;
second viewing conditions: viewing upon illumination with a combination of visible light and ultraviolet light in substantially equal parts;
third viewing conditions: viewing upon illumination with ultraviolet light.
2. (Preferred) The security element according to item 1, wherein the microscopic single elements composing the macroscopic motif are arranged in the form of a planar cascade, and the term cascade is understood to be an arrangement of successively placed single elements.
3. (Preferred) The security element according to item 2, wherein the microscopic single elements are arranged so as to be successively placed in a linear, straight, circular or wavy form within the planar cascade.
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4. (Preferred) The security element according to either of items 2 to 3, wherein the planar cascade comprises a plurality of arrangements of microscopic single elements in which the microscopic single elements are respectively arranged so as to be successively placed in a linear, straight, circUlar or wavy form, and the arrangements of the microscopic single elements are so configured that the dimensions of the microscopic single elements are uniform within an arrangement but vary from arrangement to arrangement, in particular increasing and/or decreasing continuously in one direction.
5. (Preferred) The security element according to any of items 1 to 4, wherein the microscopic single elements possess a size of at least 0.1 mm x 0.2 mm and at most 5 mm x 10 mm, preferably a size of at least 1 mm x 2 mm and at most 3 mm x 5 mm.
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Summary of the invention 1. (First aspect) A security element for a data carrier, in particular a value document, comprising a carrier substrate whose front side has a macroscopic motif composed of a multiplicity of microscopic single elements, wherein:
the microscopic single elements respectively contain at least three, in particular four, neighboring regions produced by printing technology which are so constituted that the viewer perceives a so-called first light/medium/dark contrast within each single element under first viewing conditions, perceives a substantially uniform lightness within each single element under second viewing conditions, and perceives a so-called second light/medium/dark contrast which is inverted compared to the first light/medium/dark contrast within each single element under third viewing conditions; and the microscopic single elements arouse in the viewer a dynamic impression of the macroscopic motif upon an oscillating change between the first and the third viewing conditions, and the first, second and third viewing conditions are defined as follows:
first viewing conditions: viewing upon illumination with visible light;
second viewing conditions: viewing upon illumination with a combination of visible light and ultraviolet light in substantially equal parts;
third viewing conditions: viewing upon illumination with ultraviolet light.
2. (Preferred) The security element according to item 1, wherein the microscopic single elements composing the macroscopic motif are arranged in the form of a planar cascade, and the term cascade is understood to be an arrangement of successively placed single elements.
3. (Preferred) The security element according to item 2, wherein the microscopic single elements are arranged so as to be successively placed in a linear, straight, circular or wavy form within the planar cascade.
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4. (Preferred) The security element according to either of items 2 to 3, wherein the planar cascade comprises a plurality of arrangements of microscopic single elements in which the microscopic single elements are respectively arranged so as to be successively placed in a linear, straight, circUlar or wavy form, and the arrangements of the microscopic single elements are so configured that the dimensions of the microscopic single elements are uniform within an arrangement but vary from arrangement to arrangement, in particular increasing and/or decreasing continuously in one direction.
5. (Preferred) The security element according to any of items 1 to 4, wherein the microscopic single elements possess a size of at least 0.1 mm x 0.2 mm and at most 5 mm x 10 mm, preferably a size of at least 1 mm x 2 mm and at most 3 mm x 5 mm.
6. (Preferred) The security element according to any of items 1 to 5, wherein the single elements are configured in the form of plane figures, in particular polygons, circles, cycloid figures or parts of a circle.
7. (Preferred) The security element according to any of items 1 to 6, wherein the microscopic single elements respectively contain three neighboring regions produced by printing technology, of which exactly one region has a luminescent material which is invisible upon illumination with visible light and shows a light visible color upon illumination with ultraviolet light. The luminescent material can be e.g. mixed into a daylight color. According to an alternative, the luminescent material and a daylight color can be present printed side by side in a halftone manner, so that the luminescent material is not mixed into the daylight color.
According to a further alternative, the daylight color is present in a printed layer above which a further printed layer having the luminescent material is applied.
According to a further alternative, the daylight color is present in a printed layer above which a further printed layer having the luminescent material is applied.
8. (Preferred) The security element according to any of items 1 to 6, wherein the microscopic single elements respectively contain four neighboring regions produced by printing technology, of which exactly two regions have a luminescent =
material which is invisible upon illumination with visible light and shows a light visible color upon illumination with ultraviolet light. The luminescent material can be e.g. mixed into a daylight color. According to an alternative, the luminescent material and a daylight color can be present printed side by side in a halftone manner, so that the luminescent material is not mixed into the daylight color.
According to a further alternative, the daylight color is present in a printed layer above which a further printed layer having the luminescent material is applied.
material which is invisible upon illumination with visible light and shows a light visible color upon illumination with ultraviolet light. The luminescent material can be e.g. mixed into a daylight color. According to an alternative, the luminescent material and a daylight color can be present printed side by side in a halftone manner, so that the luminescent material is not mixed into the daylight color.
According to a further alternative, the daylight color is present in a printed layer above which a further printed layer having the luminescent material is applied.
9. (Preferred) The security element according to any of items 1 to 7, wherein the microscopic single elements respectively contain three neighboring regions produced by printing technology, of which:
a first region has a first color layer in a dark visible color and a second color layer formed above the first color layer, and the second color layer contains a material luminescing under UV irradiation which is invisible upon illumination with visible light and shows a light visible color upon illumination with ultraviolet light;
a second region has a color layer in a medium or medium-dark visible color;
and a third region has a color layer in a light visible color.
a first region has a first color layer in a dark visible color and a second color layer formed above the first color layer, and the second color layer contains a material luminescing under UV irradiation which is invisible upon illumination with visible light and shows a light visible color upon illumination with ultraviolet light;
a second region has a color layer in a medium or medium-dark visible color;
and a third region has a color layer in a light visible color.
10. (Preferred) The security element according to any of items 1 to 7, wherein the microscopic single elements respectively contain three neighboring regions produced by printing technology, of which:
a first region has a color layer and the color layer contains a material in a dark visible color and a further material luminescing under UV irradiation which is invisible upon illumination with visible light and shows a light visible color upon illumination with ultraviolet light;
a second region has a color layer in a medium or medium-dark visible color;
and a third region has a color layer in a light visible color.
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a first region has a color layer and the color layer contains a material in a dark visible color and a further material luminescing under UV irradiation which is invisible upon illumination with visible light and shows a light visible color upon illumination with ultraviolet light;
a second region has a color layer in a medium or medium-dark visible color;
and a third region has a color layer in a light visible color.
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11. (Preferred) The security element according to any of items 1 to 6 or item 8, wherein the Microscopic single elements respectively contain four neighboring regions produced by printing technology, of which:
a first region has a first color layer in a very dark visible color and a second color layer formed above the first color layer, and the second color layer contains a material luminescing under UV irradiation which is invisible upon illumination with visible light and shows a light visible color upon illumination with ultraviolet light;
a second region has a first color layer in a dark visible color and a second color layer formed above the first color layer, and the second color layer contains a material luminescing under UV irradiation which is invisible upon illumination with visible light and shows a light visible color upon illumination with ultraviolet light;
a third region has a color layer in a medium or medium-dark visible color;
and a fourth region has a color layer in a light visible color.
a first region has a first color layer in a very dark visible color and a second color layer formed above the first color layer, and the second color layer contains a material luminescing under UV irradiation which is invisible upon illumination with visible light and shows a light visible color upon illumination with ultraviolet light;
a second region has a first color layer in a dark visible color and a second color layer formed above the first color layer, and the second color layer contains a material luminescing under UV irradiation which is invisible upon illumination with visible light and shows a light visible color upon illumination with ultraviolet light;
a third region has a color layer in a medium or medium-dark visible color;
and a fourth region has a color layer in a light visible color.
12. (Preferred) The security element according to any of items 1 to 6 or item 8, wherein the microscopic single elements respectively contain four neighboring regions produced by printing technology, of which:
a first region has a color layer and the color layer contains a material in a very dark visible color and a further material luminescing under UV
irradiation which is invisible upon illumination with visible light and shows a light visible color upon illumination with ultraviolet light;
a second region has a color layer and the color layer contains a material in a dark visible color and a further material luminescing under UV irradiation which is invisible upon illumination with visible light and shows a light visible color upon illumination with ultraviolet light;
a third region has a color layer in a medium or medium-dark visible color;
and a fourth region has a color layer in a light visible color.
a first region has a color layer and the color layer contains a material in a very dark visible color and a further material luminescing under UV
irradiation which is invisible upon illumination with visible light and shows a light visible color upon illumination with ultraviolet light;
a second region has a color layer and the color layer contains a material in a dark visible color and a further material luminescing under UV irradiation which is invisible upon illumination with visible light and shows a light visible color upon illumination with ultraviolet light;
a third region has a color layer in a medium or medium-dark visible color;
and a fourth region has a color layer in a light visible color.
13. (Preferred) The security element according to any of items 7 to 12, wherein the luminescent material is a fluorescent material, in particular a fluorescent ink or a fluorescent pigment.
14. (Second aspect) A data carrier, comprising a security element according to any of items 1 to 13.
15. (Preferred) The data carrier according to item 14, wherein the data carrier is a value document, in particular a bank note, an identity document or a label.
16. (Third aspect) A method for manufacturing a security element according to any of items 1 to 13, comprising the step of supplying a carrier substrate and the step of producing microscopic single elements on the front side of the carrier substrate by printing technology, in particular by means of offset, flexographic, screen, gravure, intaglio or ink-jet printing.
17. (Fourth aspect) A method for checking the authenticity of a data carrier, in particular a value document, according to item 14 or 15, comprising the step of visually detecting the dynamic impression, defined in item 1, of the macroscopic image by viewing the data carrier in daylight with the aid of a UV light source, in particular a UV hand lamp, with the distance between data carrier and UV light source being shortened and lengthened again in recurrent succession.
Detailed description of the invention [0006] The term "ultraviolet light" employed herein designates in particular light with a wavelength in a region of 235 to 380 nm.
[0007] Instead of the term "visible light" the term "daylight" will also be employed hereinafter.
[0008] The term "daylight color" is understood to be a color based on light in a wavelength region of 380 nm to 750 nm. Hereinafter the synonyms body color and chromatic color will also be employed.
[0009] The term "motif' is understood to be in particular a pattern or an image.
The motif can furthermore convey information to the viewer, by having e.g. a character, a character string or picture information.
[0010] The term "plane figure" is known in the prior art (see "Mathematische Formelsammlung" (Mathematics Formulary), Verlag Konrad Wittwer KG, Stuttgart, 1984, pages 12-15). Plane figures include in particular the following elements: triangle, in particular right-angled triangle, isosceles triangle and equilateral triangle; quadrangle, in particular square, rectangle, rhombus, parallelogram, kite, trapezoid, cyclic quadrilateral and tangential quadrilateral;
circle; cycloid figures, such as an ellipse; parts of a circle, in particular circular sector (a circular sector can be defined by the parameters r = radius, b = arc and a = central angle), annulus (an annulus can be defined by the parameters r =
radius of the inner circle and R = radius of the outer circle) and annulus sector (an annulus sector can be defined by the parameters r = radius of the inner circle, R =
radius of the outer circle, B = outer arc, b = inner arc and a = central angle).
[0011] The term "polygon" employed herein designates in particular an n-gon with n? 3.
[0012] The term "microscopic" employed herein is not to be understood in terms of "dimension in the micrometer region" or the like, but is rather to be understood merely relatively. The microscopic single elements (which will hereinafter also be designated simply "microelements") are respectively perceptible to the viewer with the naked eye, i.e. without employing optical aids, and compositely yield a total image, i.e. a macroscopic motif.
[0013] The invention is based on the idea of achieving a dynamic effect in a micro-/macroimage through the interaction of luminous colors or luminescent colors, in particular fluorescent colors, and body colors or chromatic colors by means of a suitable design. The dynamic effect is based on a light/dark interaction of a recurrent microelement structure contained in the macroscopic motif and can be observed in particular upon an oscillating traversal (i.e. through a periodic "back-and-forth") of the transition from (1) the illumination of the security element with visible light, through (2) a UV light/daylight illumination situation in an approximate ratio of 1:1, to (3) a substantially pure UV illumination situation.
The thus created play of light of the microscopic single elements causes a dynamics in the macroscopic motif. What is decisive for the dynamic effect is the periodic change of the distance between the UV light source and the security element. The percentage ratio of daylight to UV light changes here in particular in a region of 70/30 to 30/70. Since the human eye regards the lighter image components of a motif as being in the foreground or dominant, the dynamic motion effect is especially impressive upon a lightness change of closely adjacent motif elements, e.g. lines, dots or circles. The lightness change is produced by the change of the distance between the UV light source and the security element, with the luminosity e.g. of a fluorescent color increasing quadratically as the distance is shortened. Thus, at a greater distance the lighter daylight color becomes dominant, and at a smaller distance the fluorescent color, which otherwise appears darker in daylight.
[0014] The dynamic motion effect comes about, depending on the choice and arrangement of the microelements, e.g. in the form of a turning or rotation effect (i.e. the motion of a turning wheel) created by an optical illusion, or in the form of a "pumping effect" (i.e. the periodically changing three-dimensional appearance of a motif) otherwise known in holograms, or the like. A turning or rotation effect can be brought about e.g. by joining the microelements together such that they together yield a pattern with rotational symmetry, in particular a pattern with rotational symmetry and mirror symmetry. The microelements can be joined together in gapless relationship or in spaced relationship. For example, white regions or unprinted regions can be present between the individual microelements.
[0015] Suitable for carrying out the invention are in particular fluorescent pigments and fluorescent dyes (in particular organic color matters) whose optical effect is based on their ability to absorb UV radiation and emit it in the form of visible light without a time delay, i.e. with a short-lived light emission ending within 10-8 seconds. Phosphorescent materials are less preferred, but can be used on condition that the duration of the afterglow process does not impair the recognizability of the dynamic motion effect.
[0016] The security element according to the invention can be excitable in particular at two or more wavelengths and then show different fluorescent color tones in dependence on the wavelength.
[0017] The invention will be explained more closely with reference to the following embodiment variants or examples in connection with the accompanying figures. The examples represent preferred embodiments, but the invention should in no way be limited thereto. Furthermore, the representations in the figures are strongly schematic for the sake of better comprehension and do not reflect the actual conditions. In particular, the proportions shown in the figures do not correspond to the relations existing in reality and serve exclusively to improve the illustrative value.
Detailed description of the invention [0006] The term "ultraviolet light" employed herein designates in particular light with a wavelength in a region of 235 to 380 nm.
[0007] Instead of the term "visible light" the term "daylight" will also be employed hereinafter.
[0008] The term "daylight color" is understood to be a color based on light in a wavelength region of 380 nm to 750 nm. Hereinafter the synonyms body color and chromatic color will also be employed.
[0009] The term "motif' is understood to be in particular a pattern or an image.
The motif can furthermore convey information to the viewer, by having e.g. a character, a character string or picture information.
[0010] The term "plane figure" is known in the prior art (see "Mathematische Formelsammlung" (Mathematics Formulary), Verlag Konrad Wittwer KG, Stuttgart, 1984, pages 12-15). Plane figures include in particular the following elements: triangle, in particular right-angled triangle, isosceles triangle and equilateral triangle; quadrangle, in particular square, rectangle, rhombus, parallelogram, kite, trapezoid, cyclic quadrilateral and tangential quadrilateral;
circle; cycloid figures, such as an ellipse; parts of a circle, in particular circular sector (a circular sector can be defined by the parameters r = radius, b = arc and a = central angle), annulus (an annulus can be defined by the parameters r =
radius of the inner circle and R = radius of the outer circle) and annulus sector (an annulus sector can be defined by the parameters r = radius of the inner circle, R =
radius of the outer circle, B = outer arc, b = inner arc and a = central angle).
[0011] The term "polygon" employed herein designates in particular an n-gon with n? 3.
[0012] The term "microscopic" employed herein is not to be understood in terms of "dimension in the micrometer region" or the like, but is rather to be understood merely relatively. The microscopic single elements (which will hereinafter also be designated simply "microelements") are respectively perceptible to the viewer with the naked eye, i.e. without employing optical aids, and compositely yield a total image, i.e. a macroscopic motif.
[0013] The invention is based on the idea of achieving a dynamic effect in a micro-/macroimage through the interaction of luminous colors or luminescent colors, in particular fluorescent colors, and body colors or chromatic colors by means of a suitable design. The dynamic effect is based on a light/dark interaction of a recurrent microelement structure contained in the macroscopic motif and can be observed in particular upon an oscillating traversal (i.e. through a periodic "back-and-forth") of the transition from (1) the illumination of the security element with visible light, through (2) a UV light/daylight illumination situation in an approximate ratio of 1:1, to (3) a substantially pure UV illumination situation.
The thus created play of light of the microscopic single elements causes a dynamics in the macroscopic motif. What is decisive for the dynamic effect is the periodic change of the distance between the UV light source and the security element. The percentage ratio of daylight to UV light changes here in particular in a region of 70/30 to 30/70. Since the human eye regards the lighter image components of a motif as being in the foreground or dominant, the dynamic motion effect is especially impressive upon a lightness change of closely adjacent motif elements, e.g. lines, dots or circles. The lightness change is produced by the change of the distance between the UV light source and the security element, with the luminosity e.g. of a fluorescent color increasing quadratically as the distance is shortened. Thus, at a greater distance the lighter daylight color becomes dominant, and at a smaller distance the fluorescent color, which otherwise appears darker in daylight.
[0014] The dynamic motion effect comes about, depending on the choice and arrangement of the microelements, e.g. in the form of a turning or rotation effect (i.e. the motion of a turning wheel) created by an optical illusion, or in the form of a "pumping effect" (i.e. the periodically changing three-dimensional appearance of a motif) otherwise known in holograms, or the like. A turning or rotation effect can be brought about e.g. by joining the microelements together such that they together yield a pattern with rotational symmetry, in particular a pattern with rotational symmetry and mirror symmetry. The microelements can be joined together in gapless relationship or in spaced relationship. For example, white regions or unprinted regions can be present between the individual microelements.
[0015] Suitable for carrying out the invention are in particular fluorescent pigments and fluorescent dyes (in particular organic color matters) whose optical effect is based on their ability to absorb UV radiation and emit it in the form of visible light without a time delay, i.e. with a short-lived light emission ending within 10-8 seconds. Phosphorescent materials are less preferred, but can be used on condition that the duration of the afterglow process does not impair the recognizability of the dynamic motion effect.
[0016] The security element according to the invention can be excitable in particular at two or more wavelengths and then show different fluorescent color tones in dependence on the wavelength.
[0017] The invention will be explained more closely with reference to the following embodiment variants or examples in connection with the accompanying figures. The examples represent preferred embodiments, but the invention should in no way be limited thereto. Furthermore, the representations in the figures are strongly schematic for the sake of better comprehension and do not reflect the actual conditions. In particular, the proportions shown in the figures do not correspond to the relations existing in reality and serve exclusively to improve the illustrative value.
[0018] Specifically, the figures show:
Figures 1 to 15: the embodiment variant of a security element that does not fall within the scope of the present claims; this embodiment variant is mentioned merely for better comprehension of the present invention;
Figure 16: an embodiment variant of a security element according to the present invention;
Figures 17 to 20: four examples for producing microscopic single elements of which the macroscopic motif according to Fig. 16 can be composed.
Figures 1 to 15: the embodiment variant of a security element that does not fall within the scope of the present claims; this embodiment variant is mentioned merely for better comprehension of the present invention;
Figure 16: an embodiment variant of a security element according to the present invention;
Figures 17 to 20: four examples for producing microscopic single elements of which the macroscopic motif according to Fig. 16 can be composed.
[0019] Fig. 10 illustrates the construction of a security element in a cross-sectional view. The shown security element does not fall within the scope of the present claims, but the shown embodiment variant is mentioned for better comprehension of the present invention.
[0020] The present invention is founded on the principle of a dynamic interplay of colors which is obtained by combining a daylight color with a luminescent color. These foundations will be described with reference to Figures 1 to 15.
[0021] Figure 10 illustrates a carrier substrate, for example the paper substrate of a bank note, which has on its front side first motif elements (regions with the reference numbers 1 and 3) and second motif elements (regions with the reference number 2). The first and second motif elements are respectively formed by color layers produced by printing technology, with the first motif elements respectively containing a lower color layer 1 and an upper color layer 3 and the second motif elements respectively comprising only a color layer 2. The color layers possess the following properties:
Color layer 1. dark-blue daylight color Color layer 2: light-green daylight color Color layer 3: yellow fluorescent color
Color layer 1. dark-blue daylight color Color layer 2: light-green daylight color Color layer 3: yellow fluorescent color
[0022] The yellow fluorescent color of the color layer 3 is invisible upon viewing solely in daylight and appears yellow upon viewing in UV light.
[0023] Figures 1 to 3 show in plan view the structure of the printing forms for manufacturing the security element shown in Fig. 10. The printing form shown in Fig. 1 is provided for producing the color layer 1 in dark-blue daylight color. Fig.
2 shows the printing form for producing the color layer 2 in light-green daylight color. Fig. 3 shows the printing form for producing the color layer 3 in yellow fluorescent color.
=
2 shows the printing form for producing the color layer 2 in light-green daylight color. Fig. 3 shows the printing form for producing the color layer 3 in yellow fluorescent color.
=
[0024] Fig. 4 illustrates the construction of the combination print that is obtainable through the printing forms shown in Figures 1 to 3. The combination print has an outer, rectangular border 4 and an inner region 5. The printing ink of the rectangular border 4 derives solely from the printing form shown in Fig.
1. The inner region 5 contains a background print produced by the printing forms of Fig.
1 and Fig. 2 and a plurality of regions overprinted by means of the printing form of Fig. 3.
1. The inner region 5 contains a background print produced by the printing forms of Fig.
1 and Fig. 2 and a plurality of regions overprinted by means of the printing form of Fig. 3.
[0025] Fig. 5 shows the security element of Fig. 10 in plan view upon viewing in pure daylight. The viewer perceives a first information item formed by vertical, light-green stripes 7 and a dark-blue background 6.
[0026] Fig. 6 shows the security element of Fig. 10 in plan view upon viewing substantially in pure UV light. The viewer perceives a second information item formed by vertical, yellow stripes 10 and a very dark background 9.
[0027] Fig. 7 shows the security element of Fig. 10 in plan view upon viewing under daylight and UV light in a ratio of about 1:1. In the regions 11 the yellow fluorescent color mixes with the dark-blue daylight color located therebelow through additive color mixture to form a green corresponding to the daylight-green of the regions 12. There thus arises, as a third information item, an area that is single-colored to the eye.
[0028] How the motifs shown in Figures 5, 6 and 7 come about is illustrated by the cross-sectional views shown in Figures 11, 12 and 13.
[0029] Fig. 11 shows the security element of Fig. 5 in pure daylight. The reference number 8 designates the color layers formed with fluorescent color which are invisible under the present viewing conditions. The reference numbers 6 and 7 indicate the visible color layers formed with dark-blue and light-green daylight color, respectively.
[0030] Fig. 12 shows the security element of Fig. 6 in pure UV light. The reference number 10 designates the color layers formed with yellow fluorescent =
color which are visible under the present viewing conditions. The reference number 9 indicates the color layers formed with daylight color which are invisible under the present viewing conditions.
color which are visible under the present viewing conditions. The reference number 9 indicates the color layers formed with daylight color which are invisible under the present viewing conditions.
[0031] Fig. 13 shows the security element of Fig. 7 upon viewing under daylight/UV light in a ratio of about 1:1. The reference number 11 designates the green recognizable to the viewer through additive color mixture of the yellow fluorescent color and the dark-blue daylight color. The reference number 12 indicates the green formed by daylight color which is visible to the viewer.
[0032] The dynamic interplay of light in the course of the periodic motion of the UV light source is illustrated by Figures 8, 9, 14 and 15. As the distance between UV light source and object decreases the lightness of the fluorescent color increases, while conversely decreasing as said distance increases.
Compared to the fluorescent color, the lightness of the daylight colors changes in an opposite manner through decreasing of the daylight portion when the object enters a UV
chamber or through shadowing by means of a UV hand lamp sliding above the object. In other words, as the distance from the UV lamp decreases the fluorescent color becomes lighter than the daylight color, while as said distance increases the daylight color becomes lighter than the fluorescent color again.
Compared to the fluorescent color, the lightness of the daylight colors changes in an opposite manner through decreasing of the daylight portion when the object enters a UV
chamber or through shadowing by means of a UV hand lamp sliding above the object. In other words, as the distance from the UV lamp decreases the fluorescent color becomes lighter than the daylight color, while as said distance increases the daylight color becomes lighter than the fluorescent color again.
[0033] Figures 8 (plan view) and 14 (cross-sectional view) show the security element of Fig. 10 upon viewing under daylight/UV light in a ratio of about 1:2.
The regions with the reference number 13 are perceived by the viewer with light-green color, while the regions with the reference number 14 are perceived with dark-green color.
The regions with the reference number 13 are perceived by the viewer with light-green color, while the regions with the reference number 14 are perceived with dark-green color.
[0034] Figures 9 (plan view) and 15 (cross-sectional view) show the security element of Fig. 10 upon viewing under daylight/UV light in a ratio of about 2:1.
The regions with the reference number 13 are perceived by the viewer with dark-green color, while the regions with the reference number 14 are perceived with light-green color.
=
< Exemplary embodiment 1>
The regions with the reference number 13 are perceived by the viewer with dark-green color, while the regions with the reference number 14 are perceived with light-green color.
=
< Exemplary embodiment 1>
[0035] Fig. 16 shows a macroscopic motif 15 in which many single elements 16 are arranged in the form of a planar cascade. A cascade is understood to be an arrangement of successively placed, like-kind graphical elements.
[0036] Upon planar, multiple arrangement of the single elements the impression of a motion is produced by a lightness shift (i.e. an inversion or reversal of contrast). Depending on the arrangement of the single elements within the macroscopic motif and the constitution of the single elements, the direction of the motion can be varied.
[0037] Through the different lightness levels of the regions 17, 18 and 19 within a single element 16 a flowing motion effect in a certain direction is obtained in the macroscopic motif 15.
[0038] In Fig. 16 the effect causes a rotation of the total image 15 in the counter-clockwise direction.
[0039] The quality of the motion effect is dependent, inter alia, on - the size of a cascade element 16, - the luminous intensity of the UV lamp and the associated luminosity of the fluorescence, - the contrast of the single elements 16 compared to the printed environment, - the lightness difference between UV lamp light and daylight, and - the frequency at which the UV lamp is moved up and down, or back and forth, above the printed element.
[0040] Since the motion effect can be brought about in different directions depending on the arrangement of the elements 16, it is conceivable to produce motion effects in different directions within a macroscopic motif (e.g. the outer ring shown in Fig. 16 produces a motion effect in the counter-clockwise direction, the next inner ring a motion effect in the clockwise direction, etc.).
[0041] The macroscopic motif 15 shown in Fig. 16 is composed of single elements 16. The constitution of a single element, or rather of the regions 17, 18 and 19 contained therein, will be explained more closely with reference to Figures 17a to 17d.
[0042] The single element shown in Fig. 17a has three regions A, B and C in three different lightness levels. The regions are produced in the present example by halftone printing by means of daylight color, with a different area coverage being chosen per region. The single element shown in Fig. 17a contains three regions with an area coverage of 10%, 50% and 100%, respectively. The darkest region with an area coverage of 100% is additionally equipped with a fluorescent color 20 or is overprinted with fluorescent color 20.
[0043] Upon a change from daylight to UV light there occur a continuous lightening of the darker region A overprinted with fluorescent color 20, on the one hand, and a darkening of the lighter regions B and C through shadowing by means of the UV lamp housing or the UV lamp (including the hand in the case of UV
hand lamps), on the other hand.
hand lamps), on the other hand.
[0044] The abbreviations d (dark), m (medium or medium-dark) and h (light) present in Figures 17 to 19 describe the lightness of the individual regions, with the abbreviations being classified with increasing lightness as follows:
d: dark;
d-m: dark to medium;
m: medium;
m-h: medium to light;
h: light.
d: dark;
d-m: dark to medium;
m: medium;
m-h: medium to light;
h: light.
[0045] Fig. 17b shows the lightnesses of the regions A, B and C of the single element upon viewing in daylight.
4 =
4 =
[0046] Fig. 17c shows the lightnesses of the regions A, B and C of the single element upon viewing upon illumination with a combination of daylight and UV
light in substantially equal parts.
light in substantially equal parts.
[0047] Fig. 17d shows the lightnesses of the regions A, B and C of the single element upon viewing in UV light.
[0048] In daylight the area C is the lightest, A the darkest. In the half-and-half situation the darkest area becomes somewhat lighter, the lightest somewhat darker.
The total area appears virtually in a more or less uniform gray. Under UV
light the area A is the lightest, the area B the darkest. This lightness shift from C to A
arouses in the viewer the impression that the area is moving accordingly from the right to the left.
< Exemplary embodiment 2>
The total area appears virtually in a more or less uniform gray. Under UV
light the area A is the lightest, the area B the darkest. This lightness shift from C to A
arouses in the viewer the impression that the area is moving accordingly from the right to the left.
< Exemplary embodiment 2>
[0049] In this example the macroscopic motif 15 shown in Fig. 16 is composed of single elements 16, with the constitution of a single element, or rather of the regions 17, 18 and 19 contained therein, being explained more closely with reference to Figures 18a to 18d.
[0050] The single element shown in Fig. 18a has four regions A, B, C and D
in four different lightness levels. The regions are produced in the present example by halftone printing by means of daylight color, with a different area coverage being chosen per region. The single element shown in Fig. 18a contains four regions with an area coverage of 10%, 40%, 70% and 100%, respectively. The darkest region with an area coverage of 100% and the second-darkest region with an area coverage of 70% are respectively additionally equipped with a fluorescent color 21 or are overprinted with fluorescent color 21.
in four different lightness levels. The regions are produced in the present example by halftone printing by means of daylight color, with a different area coverage being chosen per region. The single element shown in Fig. 18a contains four regions with an area coverage of 10%, 40%, 70% and 100%, respectively. The darkest region with an area coverage of 100% and the second-darkest region with an area coverage of 70% are respectively additionally equipped with a fluorescent color 21 or are overprinted with fluorescent color 21.
[0051] Upon a change from daylight to UV light there occur a continuous lightening of the darker regions A and B overprinted with fluorescent color 21, on the one hand, and a darkening of the lighter regions C and D through shadowing 4 =
by means of the UV lamp housing or the UV lamp (including the hand in the case of UV hand lamps), on the other hand.
by means of the UV lamp housing or the UV lamp (including the hand in the case of UV hand lamps), on the other hand.
[0052] Fig. 18b shows the lightnesses of the regions A, B, C and D of the single element upon viewing in daylight.
[0053] Fig. 18c shows the lightnesses of the regions A, B, C and D of the single element upon viewing upon illumination with a combination of daylight and UV light in substantially equal parts.
[0054] Fig. 18d shows the lightnesses of the regions A, B, C and D of the single element upon viewing in UV light.
[0055] In daylight, area D is the lightest, area C the second-lightest, area B the darkest and area A the second-darkest. Through the lightening of the two dark regions A and B under the UV lamp with simultaneous darkening of the light regions C and D, the total area appears in a more or less uniform gray in the half-and-half situation.
[0056] Under UV light this effect is strengthened further, so that position A
appears as the lightest area, and position B as the second-lightest. This lightness shift from D to A arouses in the viewer the impression that the area is moving accordingly from the right to the left.
< Exemplary embodiment 3>
appears as the lightest area, and position B as the second-lightest. This lightness shift from D to A arouses in the viewer the impression that the area is moving accordingly from the right to the left.
< Exemplary embodiment 3>
[0057] According to a variant of the case described in exemplary embodiment 2, further arrangements of the gray-level fields within a single element 16 shown in Fig. 16 are conceivable.
[0058] Fig. 19a shows the lightnesses of the regions A, B, C and D of the single element upon viewing in daylight.
. .
t =
. [0059] Fig. 19b shows the lightnesses of the regions A, B, C and D of the single element upon viewing upon illumination with a combination of daylight and UV light in substantially equal parts.
[0060] Fig. 19c shows the lightnesses of the regions A, B, C and D of the single element upon viewing in UV light.
[0061] In general, the realization of a single element can be carried out via any form of halftoning of a single color or as a multicolor print of different gray levels or color tones of different lightness or also by means of partial overprinting of two color tones.
[0062] When the motif is printed in a halftone manner, the coverage ratio changes accordingly, since in this case no 100% area coverage can be present.
In this case a maximum area coverage of 70 to 80% is obtained.
[0063] Manufacture is in principle process-independent, i.e. one can proceed e.g. by means of offset printing, intaglio printing, screen printing or flexographic printing. The printing methods can likewise be combined with each other, e.g.
daylight color by offset, intaglio or screen printing, and fluorescent color by ink-jet, screen or flexographic printing.
< Exemplary embodiment 4>
[0064] In this example the macroscopic motif 15 shown in Fig. 16 is composed of single elements 16, with the constitution of a single element, or rather of the regions 17, 18 and 19 contained therein, being explained more closely with reference to Figures 20a and 20b.
[0065] Fig. 20a shows the partial overprint of different-colored areas 22 and 23 of different lightness. Area 22 is blue, and area 23 light-green. The fluorescent color is in this example printed congruently over the blue area 22 or can be mixed thereinto. The paper-white serves as the lightest area (with an area coverage or gray level of 10%).
4 õ
[0066] Fig. 20b shows the overprint which has the blue area 24, the dark-blue area 25, the light-green area 26 and the white area 27.
. .
t =
. [0059] Fig. 19b shows the lightnesses of the regions A, B, C and D of the single element upon viewing upon illumination with a combination of daylight and UV light in substantially equal parts.
[0060] Fig. 19c shows the lightnesses of the regions A, B, C and D of the single element upon viewing in UV light.
[0061] In general, the realization of a single element can be carried out via any form of halftoning of a single color or as a multicolor print of different gray levels or color tones of different lightness or also by means of partial overprinting of two color tones.
[0062] When the motif is printed in a halftone manner, the coverage ratio changes accordingly, since in this case no 100% area coverage can be present.
In this case a maximum area coverage of 70 to 80% is obtained.
[0063] Manufacture is in principle process-independent, i.e. one can proceed e.g. by means of offset printing, intaglio printing, screen printing or flexographic printing. The printing methods can likewise be combined with each other, e.g.
daylight color by offset, intaglio or screen printing, and fluorescent color by ink-jet, screen or flexographic printing.
< Exemplary embodiment 4>
[0064] In this example the macroscopic motif 15 shown in Fig. 16 is composed of single elements 16, with the constitution of a single element, or rather of the regions 17, 18 and 19 contained therein, being explained more closely with reference to Figures 20a and 20b.
[0065] Fig. 20a shows the partial overprint of different-colored areas 22 and 23 of different lightness. Area 22 is blue, and area 23 light-green. The fluorescent color is in this example printed congruently over the blue area 22 or can be mixed thereinto. The paper-white serves as the lightest area (with an area coverage or gray level of 10%).
4 õ
[0066] Fig. 20b shows the overprint which has the blue area 24, the dark-blue area 25, the light-green area 26 and the white area 27.
Claims (17)
1. A security element for a data carrier, in particular a value document, comprising a carrier substrate whose front side has a macroscopic motif composed of a multiplicity of microscopic single elements, wherein :
the microscopic single elements respectively contain at least three, in particular four, neighboring regions produced by printing technology which are so constituted that the viewer perceives a so-called first light/medium/dark contrast within each single element under first viewing conditions, perceives a substantially uniform lightness within each single element under second viewing conditions, and perceives a so-called second light/medium/dark contrast which is inverted compared to the first light/medium/dark contrast within each single element under third viewing conditions; and the microscopic single elements arouse in the viewer a dynamic impression of the macroscopic motif upon an oscillating change between the first and the third viewing conditions, and the first, second and third viewing conditions are defined as follows:
first viewing conditions: viewing upon illumination with visible light;
second viewing conditions: viewing upon illumination with a combination of visible light and ultraviolet light in substantially equal parts;
third viewing conditions: viewing upon illumination with ultraviolet light.
the microscopic single elements respectively contain at least three, in particular four, neighboring regions produced by printing technology which are so constituted that the viewer perceives a so-called first light/medium/dark contrast within each single element under first viewing conditions, perceives a substantially uniform lightness within each single element under second viewing conditions, and perceives a so-called second light/medium/dark contrast which is inverted compared to the first light/medium/dark contrast within each single element under third viewing conditions; and the microscopic single elements arouse in the viewer a dynamic impression of the macroscopic motif upon an oscillating change between the first and the third viewing conditions, and the first, second and third viewing conditions are defined as follows:
first viewing conditions: viewing upon illumination with visible light;
second viewing conditions: viewing upon illumination with a combination of visible light and ultraviolet light in substantially equal parts;
third viewing conditions: viewing upon illumination with ultraviolet light.
2. The security element according to claim 1, wherein the microscopic single elements composing the macroscopic motif are arranged in the form of a planar cascade, and the term cascade is understood to be an arrangement of successively placed single elements.
3. The security element according to claim 2, wherein the microscopic single elements are arranged so as to be successively placed in a linear, straight, circular or wavy form within the planar cascade.
4. The security element according to either of claims 2 to 3, wherein the planar cascade comprises a plurality of arrangements of microscopic single elements in which the microscopic single elements are respectively arranged so as to be successively placed in a linear, straight, circular or wavy form, and the arrangements of the microscopic single elements are so configured that the dimensions of the microscopic single elements are uniform within an arrangement but vary from arrangement to arrangement, in particular increasing and/or decreasing continuously in one direction.
5. The security element according to any of claims 1 to 4, wherein the microscopic single elements possess a size of at least 0.1 mm x 0.2 mm and at most 5 mm x 10 mm, preferably a size of at least 1 mm x 2 mm and at most 3 mm x 5 mm.
6. The security element according to any of claims 1 to 5, wherein the single elements are configured in the form of plane figures, in particular polygons, circles, cycloid figures or parts of a circle.
7. The security element according to any of claims 1 to 6, wherein the microscopic single elements respectively contain three neighboring regions produced by printing technology, of which exactly one region has a luminescent material which is invisible upon illumination with visible light and shows a light visible color upon illumination with ultraviolet light.
8. The security element according to any of claims 1 to 6, wherein the microscopic single elements respectively contain four neighboring regions produced by printing technology, of which exactly two regions have a luminescent material which is invisible upon illumination with visible light and shows a light visible color upon illumination with ultraviolet light.
9. The security element according to any of claims 1 to 7, wherein the microscopic single elements respectively contain three neighboring regions produced by printing technology, of which:
a first region has a first color layer in a dark visible color and a second color layer formed above the first color layer, and the second color layer contains a material luminescing under UV irradiation which is invisible upon illumination with visible light and shows a light visible color upon illumination with ultraviolet light;
a second region has a color layer in a medium or medium-dark visible color;
and a third region has a color layer in a light visible color.
a first region has a first color layer in a dark visible color and a second color layer formed above the first color layer, and the second color layer contains a material luminescing under UV irradiation which is invisible upon illumination with visible light and shows a light visible color upon illumination with ultraviolet light;
a second region has a color layer in a medium or medium-dark visible color;
and a third region has a color layer in a light visible color.
10. The security element according to any of claims 1 to 7, wherein the microscopic single elements respectively contain three neighboring regions produced by printing technology, of which:
a first region has a color layer and the color layer contains a material in a dark visible color and a further material luminescing under UV irradiation which is invisible upon illumination with visible light and shows a light visible color upon illumination with ultraviolet light;
a second region has a color layer in a medium or medium-dark visible color;
and a third region has a color layer in a light visible color.
a first region has a color layer and the color layer contains a material in a dark visible color and a further material luminescing under UV irradiation which is invisible upon illumination with visible light and shows a light visible color upon illumination with ultraviolet light;
a second region has a color layer in a medium or medium-dark visible color;
and a third region has a color layer in a light visible color.
11. The security element according to any of claims 1 to 6 or claim 8, wherein the microscopic single elements respectively contain four neighboring regions produced by printing technology, of which:
a first region has a first color layer in a very dark visible color and a second color layer formed above the first color layer, and the second color layer contains a material luminescing under UV irradiation which is invisible upon illumination with visible light and shows a light visible color upon illumination with ultraviolet light;
a second region has a first color layer in a dark visible color and a second color layer formed above the first color layer, and the second color layer contains a material luminescing under UV irradiation which is invisible upon illumination with visible light and shows a light visible color upon illumination with ultraviolet light;
a third region has a color layer in a medium or medium-dark visible color;
and a fourth region has a color layer in a light visible color.
a first region has a first color layer in a very dark visible color and a second color layer formed above the first color layer, and the second color layer contains a material luminescing under UV irradiation which is invisible upon illumination with visible light and shows a light visible color upon illumination with ultraviolet light;
a second region has a first color layer in a dark visible color and a second color layer formed above the first color layer, and the second color layer contains a material luminescing under UV irradiation which is invisible upon illumination with visible light and shows a light visible color upon illumination with ultraviolet light;
a third region has a color layer in a medium or medium-dark visible color;
and a fourth region has a color layer in a light visible color.
12. The security element according to any of claims 1 to 6 or claim 8, wherein the microscopic single elements respectively contain four neighboring regions produced by printing technology, of which:
a first region has a color layer and the color layer contains a material in a very dark visible color and a further material luminescing under UV
irradiation which is invisible upon illumination with visible light and shows a light visible color upon illumination with ultraviolet light;
a second region has a color layer and the color layer contains a material in a dark visible color and a further material luminescing under UV irradiation which is invisible upon illumination with visible light and shows a light visible color upon illumination with ultraviolet light;
a third region has a color layer in a medium or medium-dark visible color;
and a fourth region has a color layer in a light visible color.
a first region has a color layer and the color layer contains a material in a very dark visible color and a further material luminescing under UV
irradiation which is invisible upon illumination with visible light and shows a light visible color upon illumination with ultraviolet light;
a second region has a color layer and the color layer contains a material in a dark visible color and a further material luminescing under UV irradiation which is invisible upon illumination with visible light and shows a light visible color upon illumination with ultraviolet light;
a third region has a color layer in a medium or medium-dark visible color;
and a fourth region has a color layer in a light visible color.
13. The security element according to any of claims 7 to 12, wherein the luminescent material is a fluorescent material, in particular a fluorescent ink or a fluorescent pigment.
14. A data carrier, comprising a security element according to any of claims 1 to 13.
15. The data carrier according to claim 14, wherein the data carrier is a value document, in particular a bank note, an identity document or a label.
16. A method for manufacturing a security element according to any of claims 1 to 13, comprising the step of supplying a carrier substrate and the step of producing microscopic single elements on the front side of the carrier substrate by printing technology, in particular by means of offset, flexographic, screen, gravure, intaglio or ink-jet printing.
17. A method for checking the authenticity of a data carrier, in particular a value document, according to claim 14 or 15, comprising the step of visually detecting the dynamic impression, defined in claim 1, of the macroscopic motif by viewing the data carrier in daylight with the aid of a UV light source, in particular a UV
hand lamp, with the distance between data carrier and UV light source being shortened and lengthened again in recurrent succession.
hand lamp, with the distance between data carrier and UV light source being shortened and lengthened again in recurrent succession.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102013008507.1A DE102013008507A1 (en) | 2013-05-16 | 2013-05-16 | Security element, manufacturing method, data carrier equipped with the security element and method for verifying the authenticity |
| DE102013008507.1 | 2013-05-16 | ||
| PCT/EP2014/001289 WO2014183865A1 (en) | 2013-05-16 | 2014-05-13 | Security element, production method, data carrier equipped with the security element and method for checking the authenticity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2907989A1 true CA2907989A1 (en) | 2014-11-20 |
Family
ID=50732097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2907989A Abandoned CA2907989A1 (en) | 2013-05-16 | 2014-05-13 | Security element, production method, data carrier equipped with the security element and method for checking the authenticity |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP2996881B1 (en) |
| CA (1) | CA2907989A1 (en) |
| DE (1) | DE102013008507A1 (en) |
| PL (1) | PL2996881T3 (en) |
| WO (1) | WO2014183865A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102022001659A1 (en) | 2022-05-11 | 2023-11-16 | Giesecke+Devrient Currency Technology Gmbh | Value document with luminescent feature, value document system, manufacturing process and testing method |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0228303D0 (en) | 2002-12-04 | 2003-01-08 | Rue De Int Ltd | Security device and method |
| WO2008100885A1 (en) * | 2007-02-12 | 2008-08-21 | Evident Technologies | Semiconductor nanocrystals as marking devices |
| US20110298204A1 (en) * | 2010-06-07 | 2011-12-08 | Xerox Corporation | Document security by aligning visible and hidden marks |
| DE102010054760A1 (en) * | 2010-12-16 | 2012-02-16 | Giesecke & Devrient Gmbh | Security element, method of making same and disk |
| DE102013008505A1 (en) * | 2012-11-30 | 2014-06-05 | Giesecke & Devrient Gmbh | Security element, manufacturing method, data carrier equipped with the security element and method for verifying the authenticity |
-
2013
- 2013-05-16 DE DE102013008507.1A patent/DE102013008507A1/en not_active Withdrawn
-
2014
- 2014-05-13 PL PL14724313T patent/PL2996881T3/en unknown
- 2014-05-13 CA CA2907989A patent/CA2907989A1/en not_active Abandoned
- 2014-05-13 WO PCT/EP2014/001289 patent/WO2014183865A1/en active Application Filing
- 2014-05-13 EP EP14724313.3A patent/EP2996881B1/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| EP2996881B1 (en) | 2017-03-29 |
| WO2014183865A1 (en) | 2014-11-20 |
| EP2996881A1 (en) | 2016-03-23 |
| DE102013008507A1 (en) | 2014-11-20 |
| PL2996881T3 (en) | 2017-08-31 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request |
Effective date: 20190328 |
|
| FZDE | Discontinued |
Effective date: 20210831 |