EP3243669A2 - Élément de sécurité et son procédé de fabrication - Google Patents

Élément de sécurité et son procédé de fabrication Download PDF

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Publication number
EP3243669A2
EP3243669A2 EP17000208.3A EP17000208A EP3243669A2 EP 3243669 A2 EP3243669 A2 EP 3243669A2 EP 17000208 A EP17000208 A EP 17000208A EP 3243669 A2 EP3243669 A2 EP 3243669A2
Authority
EP
European Patent Office
Prior art keywords
carrier
color
laser radiation
coating
security
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.)
Granted
Application number
EP17000208.3A
Other languages
German (de)
English (en)
Other versions
EP3243669B1 (fr
EP3243669A3 (fr
Inventor
André Gregarek
Veronika RACK
Manfred Heim
Bernhard Wiedner
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.)
Giesecke and Devrient Currency Technology GmbH
Original Assignee
Giesecke and Devrient Currency Technology GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Giesecke and Devrient Currency Technology GmbH filed Critical Giesecke and Devrient Currency Technology GmbH
Priority to PL17000208T priority Critical patent/PL3243669T3/pl
Publication of EP3243669A2 publication Critical patent/EP3243669A2/fr
Publication of EP3243669A3 publication Critical patent/EP3243669A3/fr
Application granted granted Critical
Publication of EP3243669B1 publication Critical patent/EP3243669B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/346—Perforations
    • 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
    • B42D25/40—Manufacture
    • B42D25/405—Marking
    • B42D25/41—Marking using electromagnetic radiation
    • 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
    • B42D25/40—Manufacture
    • B42D25/405—Marking
    • B42D25/43—Marking by removal of material
    • B42D25/435—Marking by removal of material using electromagnetic radiation, e.g. laser

Definitions

  • the invention relates to a method for producing a security feature for a security element, a security paper or a data carrier, wherein a carrier is provided which has a front side and a rear side, the carrier is provided with a coating that is modifiable by laser radiation in terms of their color, and the carrier is locally changed in its thickness by the action of laser beam intensity-distributed in the beam cross-section, wherein at the same time the coating is modified by the laser radiation with respect to the color.
  • the invention further relates to a security feature for a security element, a security paper or a data carrier, comprising: a carrier having a front side and a rear side, wherein the carrier is provided with a coating which is modifiable by laser radiation in terms of their color, by means of Laser radiation of the carrier is locally changed in thickness, and wherein the coating is modified by laser radiation in terms of color, and a security element, a security paper and a value document or a data carrier with such a security feature.
  • Identity cards such as credit cards or identity cards
  • the production of continuous openings in value documents, eg banknote papers, by laser cutting has also been known for some time.
  • document DE 4334848 C1 describes a security with a closed by a transparent cover film window-like opening, which can be generated by a laser cutting process.
  • the WO 2009/003587 A1 describes a manufacturing method and a corresponding security feature of the type mentioned, which is produced by a laser cutting method by laser radiation is radiated from an upper side onto the carrier.
  • the support of the security feature is previously coated on top with a marker which changes color by the action of laser beams.
  • a cutting laser beam is used whose intensity is distributed non-uniformly over the beam cross-section, for example Gaussian.
  • Such radiation is referred to herein as laser radiation which is intensity-distributed across the beam cross-section, the radiation intensity decreasing towards the edge of the laser beam.
  • a colored border of holes is also from the WO 2009/003588 A1
  • several laser beams of different intensities are required in order to achieve a particularly large and thus well-recognizable color effect.
  • Laser radiation-sensitive marking substances are known, for example, from the following publications: EP 1657072 B1 . EP 2332012 B1 . US 7270919 . US 7485403 . US 7998900 . US 8021820 . US8048608 . US8048605 . US 8083973 . US 8101544 . US 8101545 . US 8105506 . US 8173253 . US 8178277 . US 8278243 . US 8278244 and US 842028 ,
  • the WO 98/36913 is also concerned with the creation of security markings on both sides of a security paper, using a laser beam which simultaneously performs an ablation on the front and back of the security paper so as to produce identical markings on both sides.
  • the DE 102010053052 A2 discloses a data carrier containing a mark produced by the action of laser radiation, which produces a different visual appearance when viewed than in a plan view.
  • the invention is therefore based on the object to further improve a security element, security paper and data carriers of the type mentioned in terms of imitation security and to simplify the manufacturability.
  • a method for producing a security feature for a security element, a security paper or a data carrier wherein a carrier is provided which has a front side and a rear side, the carrier is provided with a coating which can be modified by laser radiation with respect to their color is, and by the action of laser beam in the beam cross-section intensity-distributed the carrier is locally changed in its thickness, wherein at the same time the coating is modified by the laser radiation in terms of color, wherein the carrier is provided on its back with the coating and the laser radiation is irradiated from the front of the carrier, wherein as a local change in thickness Hole is generated in the carrier and due to the intensity distribution over the beam cross section, a zone surrounding an edge of the hole at the back of the carrier, is modified in terms of color.
  • the object is further achieved by a method for producing a security feature for a security element, a security paper or a data carrier, wherein a carrier is provided, which has a front side and a rear side, the carrier is provided with a coating which by laser radiation in terms of their color is modifiable locally by changing the beam cross-section intensity-distributed laser radiation, the carrier is modified in thickness, wherein at the same time the coating is modified by the laser radiation in terms of color, wherein the carrier is provided on its back with the coating and the laser radiation from the front the carrier is irradiated, wherein the change in thickness is a depression on the front side of the carrier and a zone located on the rear side of the carrier below the depression is modified in color.
  • a security feature for a security element, a security paper or a data carrier comprising: a carrier having a front side and a rear side, wherein the carrier is provided with a coating that is modifiable by laser radiation in terms of their color, wherein by means of laser radiation, the carrier is locally changed in thickness, and wherein the coating by Laser radiation is modified in terms of color, wherein the carrier is provided on its rear side with the coating and the local change in thickness is a generated by the laser radiation from the front in the carrier hole, wherein a zone which is an edge of the hole at the back of the carrier surrounds, is modified by the laser radiation in terms of color.
  • a security feature for a security element, a security paper or a data carrier comprising: a carrier having a front side and a rear side, wherein the carrier is provided with a coating that is modifiable by laser radiation in terms of their color, wherein the carrier is locally changed in thickness by means of laser radiation, and wherein the coating is modified by laser radiation in color, the carrier is provided on its back with the coating and the local change in thickness by means of the laser radiation from the front of the carrier generated depression is, wherein a zone which lies at the back of the carrier under the recess, is modified by the laser radiation in terms of color.
  • the invention causes by irradiation of the laser radiation from the front to the carrier a change in thickness of the paper.
  • This change in thickness is local. It can also be carried out as a reduction to the thickness zero, ie as a hole.
  • the laser radiation causes a color modification. This happens because the intensity of the laser radiation is no longer sufficient here for removing carrier material, ie, the hole is not further enlarged or the depression is even deeper, but is still capable of modifying the coating. In this way arises on the opposite side one Color marking in the exact register for thickness modification, which is incorporated from the front.
  • front and back are used in this specification solely with reference to the irradiation of the laser radiation.
  • the front side is the side on which the laser radiation is irradiated
  • the back side is the opposite side of the carrier.
  • the carrier is flat.
  • front and back have nothing to do with a later use of the wearer. The term choice is not intended to imply that one of the pages must or may not have a particular meaning for use.
  • the invention provides two variants: First, the paper is cut. Then the local change in thickness is a hole. On the other hand, a depression or incision is made, ie the paper is thinned or scratched from the front. In both variants, the local thickness change is accurate to the color modification on the back. So there is a hole or a depression / scratching, which is accurate to the color effect on the back.
  • a security feature indicates that a hole was created by a laser beam and was not punched.
  • the registration accuracy can also be used on the front, if this is also provided with a coating that is modifiable by the laser radiation in terms of their color. It then occur, for example, from the WO 2010/072329 A1 Known effects that the edge to the thickness reduction on the entrance side has a color marker. In the first variant, in which the change in thickness is a hole, this hole then has a colored edge on the front and on the back. The color effects can be different if you use coatings on the front and back that differ in their color effect.
  • the color marks on the front and back face each other in a characteristic register, which is ultimately defined by the parameters of the laser beam (intensity distribution, total intensity and angle of incidence to the Surface of the front and back) and the thickness of the carrier is determined.
  • the thickness change is a depression.
  • a substance that requires less energy input (and therefore lower temperatures) for color modification can be used in the backside coating. Is the energy input on the Top of the carrier very high, a substance B, if it has a lower reaction enthalpy than a substance A, can be destroyed by the comparatively increased energy input, while substance A is maintained.
  • the laser energy is attenuated as it passes through the substrate, causing a color modification on the reverse side and not destroying substance B. It is thus possible to generate two colors on the backside by varying the intensity of the laser radiation.
  • the security feature can be further improved in terms of its security against counterfeiting by using a pasted into a paper or on it, in particular a window spanning, glued security thread in the case of banknotes when a hole is inserted in the security thread, which extends as a recess in the carrier, including Under this recess on the back of the carrier the color modification takes place.
  • the color effect then interacts with the hole that is introduced into the security thread, so that the hole appears colored in a transparent view. This is particularly beneficial for metallic security threads, which have a reflective effect in supervision.
  • the security feature shows the hole in supervision as a missing reflex, so for example as a dark impression, and in see-through view, the hole is colored.
  • the security thread may also be used in addition to a change in thickness produced without it.
  • the two variations of the thickness change can also be combined. This is by adjusting the parameters of the laser radiation, for example, the irradiation time, the z. B. can be adjusted via the cutting speed, or the laser radiation intensity easily possible. Then a hole or a depression is created in the carrier depending on the corresponding parameters.
  • recesses and / or holes can provide motifs or alphanumeric characters, as one skilled in the art mentioned above, for example in the WO 2010/072329 A1 and WO 2011/154112 A1 or even the WO 2009/003588 A1 is known.
  • the variants described there are likewise usable within the scope of the invention described here.
  • color is not limited to a colorful impression, but can also include white and black and the change between transparent and opaque.
  • the marking substance need not be further structured or specially applied for the registration between color and hole / depression. It is even possible to provide the marking substance over the entire area in a much larger area than the surface treated with laser radiation occupies.
  • the laser beam energy in an outer region of the beam cross section is sufficient to modify the marking substance in the zone around the edge of the hole or under the depression. This automatically ensures perfect registration of the aperture and the laser-modified zone.
  • thermoreactive colored pigments such as ultramarine blue can be used for this purpose.
  • marking substances whose infrared-absorbing properties or their magnetic, electrical or luminescent properties are changed by the action of the laser radiation.
  • Security features with such laser radiation-modified hole edges can be used in particular for mechanical authenticity testing.
  • a combination of different marking substances for example in order to enable both a visual and a machine authenticity check of the security feature.
  • the modification of the carrier / marker may be erosion or destruction.
  • the marker is preferably a metallic coating in this case.
  • laser radiation-modifiable effect pigments are used as the laser-radiation-modifiable marker.
  • Such effect pigments are available to the person skilled in the art with different properties, in particular with respect to their body color, the color change under laser radiation, the threshold energy and the required laser radiation wavelength.
  • effect pigments which change not only their visible color under laser radiation but their infrared-absorbing, magnetic, electrical or luminescent properties are known to the person skilled in the art.
  • the modification of the effect pigments can be made with laser radiation in the ultraviolet, visible or infrared spectral range, for example, a CO 2 laser of a wavelength of 10.6 microns.
  • a pigment-free laser-radiation-modifiable marker is used.
  • Pigment-free marking substances can also be applied to the support, for example as a stich or printing ink. With pigment-free marking materials, a coating of high transparency can be produced, into which a permanent and high-contrast marking can be introduced by laser action at high speed.
  • Pigment-free marking substances can be modified by laser radiation in the ultraviolet, visible or infrared spectral range, for example with the 10.6 ⁇ m radiation of a CO 2 laser.
  • non-limiting examples of pigment-free laser-modifiable markers are in the documents WO 02/101462 A1 . US 4343885 and EP 0290750 B1 specified, the disclosure of which is included in the present description in this regard.
  • the invention also encompasses a security element for security papers, documents of value and the like with a security feature produced according to the methods described.
  • the security feature has a carrier, which is locally changed by the action of laser radiation in terms of its thickness and at the same time has a modified by the laser radiation in terms of color zone.
  • the color-modified zone lies on the underside, which is opposite to the front side from which the laser radiation is introduced. If the local thickness change is a hole, the zone in which the color is modified is at the edge of the hole. If the thickness modification is a depression, the color zone is below the depression.
  • Such a security element may for example be in the form of a security thread, a label, a transfer element or a covering film for a window area or a hole in a value document, such as a banknote.
  • the invention also includes a security paper for the production of value documents or the like with a security feature produced according to the described method.
  • the invention further includes a data carrier with a security feature produced by the method described, in particular a value document such as a banknote, identity card or the like, wherein the data carrier has a carrier.
  • the invention will be explained using the example of a banknote.
  • the Fig. 1 shows a schematic representation of the banknote 10, a in Fig. 2 has security feature 12 shown in more detail.
  • the security feature 12 is exemplarily characterized by a motif in the form of an outline 18.
  • Fig. 2 shows the security feature 12 in the left-hand illustration of a front side 14, in the right-hand illustration of an opposite rear side 16 forth.
  • the outline 18 in the right-hand representation is mirrored in relation to the left-hand representation.
  • the outline 18 was generated by passing a laser beam over the front side 14.
  • the rear side 16 has been provided with a laser-markable coating which, when exposed to laser radiation above a certain energy, exhibits a color effect, for example changes its color.
  • the intensity of the laser radiation was varied when the outline 18 was traversed, so that the outline 18 consists of different sections.
  • the intensity of the laser radiation has been adjusted so that recesses 20 are incorporated into the carrier material of the security feature 12 from the front side 14.
  • the laser radiation is switched off or reduced so that no processing of the carrier material takes place. This results in gaps 22, which in the left illustration of Fig. 2 symbolized by a narrow black line.
  • the depressions 20 are symbolized by an unfilled line.
  • the laser radiation intensity was adjusted so that a Hole 24 is produced through the carrier. The holes 24 are symbolized by thicker, unfilled lines.
  • This design of the outline 18 results in a total of the front side 14, a motif 26, the mirror image and in a different color design as a motif 26 'is also recognizable on the back 16.
  • embodiments can also work only with holes or depressions and without gaps.
  • the motifs need not be limited to outlines 18. Large holes / depressions are equally possible, for. B. to produce areal motifs.
  • Fig. 3a shows by way of example a substantially Gaussian spatial intensity distribution of a laser beam 34. The fluence therefore decreases from the center to the edge.
  • a first working region A1 the laser beam intensity exceeds that required for cutting or ablation of the carrier Minimum energy E1.
  • E2 is in Fig. 3a denotes a reaction energy of the marker, when said exceeding the color change occurs.
  • a second working region A2 the fluence between the reaction energy E2 required for the color change and the minimum energy E1 required for cutting is present, so that only a color change is induced in this region 34 but the carrier is not cut.
  • the carrier is therefore discolored in the laser cutting by the laser beam in a zone at the back edge of each hole 24 in perfect registration with the hole 24.
  • the width of the colored edge 30 corresponds to the width of the second working region A2 and depends on the intensity distribution over the beam cross-section, the reaction energy of the effect pigments used and the material properties of the carrier, for. B. of the banknote paper.
  • the laser beam intensity is below the reaction energy of the coating, so that the carrier is not changed in color there.
  • thermoreactive color pigments such as ultramarine blue
  • two or more different threshold energy coating substances or a combination of visually and mechanically detectable substances may also be used to produce multiple passivated edge effects.
  • Non-pigmented, laser-radiation-modifiable coatings can have a very high transparency in the unlabeled state.
  • laser radiation for example a CO 2 laser at 10.6 microns can be a high speed permanent and high-contrast markings, for example, produce a black marking in the coating.
  • the heat generated during laser cutting causes the modification.
  • the modified edge area of the opening can optionally be even larger than the beam extent.
  • Fig. 3b shows a beam profile of a laser beam 34, which has a lower maximum energy.
  • the laser beam is thus able to insert a recess in the material of the carrier, but does not produce a hole.
  • the depression is introduced as soon as the energy of the laser beam is above a threshold value E3.
  • the maximum width of the recess is given by a width given by the first and the second working range A1 + A2.
  • the intensity of the laser beam as it exits the rear of the carrier also exceeds the energy E2 required to change the color of the laser-modifiable coating applied to the back surface 16. In the first working area A1, this results in the color marking 28 on the back under the depression.
  • the explanations based on the Fig. 3a and 3b assume a substantially Gaussian spatial distribution of the energy of the laser beam 34. As explained below, it is not absolutely necessary that the intensity profile is Gaussian. Furthermore, the invention is not limited to the generation of circular holes. Rather, with the laser radiation 34 also, like the Fig. 2 shows a line to be cut.
  • the Fig. 3a and 3b use a constant cutting speed.
  • the energy input of the laser radiation into the material of the carrier exceeds the energy required to produce a hole in the working area A1 or the energy required to produce a depression in the area A1 + A2.
  • the energy E1 needed to create a hole, or the energy E3 needed to create a pit but not a hole is of course affected by the cutting speed.
  • the hole size for example the cutting width, or the recess depth along the path along which the laser beam is guided, can be varied as desired at a constant cutting speed by the virtually instantaneous possible variation of the laser power.
  • the laser radiation is kept constant by a change in the cutting speed.
  • the laser radiation acts only relatively briefly on the material of the carrier, so that the energy input is comparatively low. Accordingly, the energy E1 or E3 required for generating a hole or generating a depression is exceeded only in a small range.
  • the laser radiation acts longer on the material of the carrier, so that a higher energy input results in the carrier. Accordingly, there is a larger hole or a deeper and / or further depression, since the area in which the energy E2 or E3 is exceeded, is correspondingly larger. Accordingly, the structuring of the outline, which in Fig.
  • the cutting speed is varied in the transition from the sections 24 with a hole 22 with a gap and 20 with a depression accordingly.
  • the cutting speed must be the lowest, to create a gap highest. Inverse applies to the energy at constant cutting speed.
  • marking substance it is also possible, as an option, for the marking substance to be removed or destroyed directly next to the cutting edge, and for it to be modified only from a certain small distance from the cutting edge.
  • the laser beam 34 has an intensity distribution which is not constant, ie has no top hat profile.
  • Any intensity profile in which the intensity of the laser beam 44 decreases toward the edge of the beam cross-section with respect to the maximum value can be used for generating the colored edge 30, the type of intensity profile naturally being based on the width of the beam Edge 30 relative to the maximum hole diameter of each hole 24 effects.
  • an intensity distribution is also possible which has a top-hat profile. Such a profile is therefore suitable for executions that work exclusively with depressions and do not produce holes with colored borders on the back.
  • Fig. 3c shows a schematic sectional view through the security feature 12 in the region of a hole 24.
  • the carrier 38 is provided on its front side 14 with a laser-modifiable coating 40.
  • the back 16 carries a laser-modifiable coating 42.
  • the coating 40 is optional.
  • the laser radiation 34 for which the beam profile is applied by way of example, is irradiated from an incident direction 36, which in the selected example is perpendicular to the front side 14 and the rear side 16.
  • the laser beam 34 creates the hole 24 having an upper edge 44 and a lower edge 46. Due to the usual for laser radiation Materialabtrages results for the hole edge 48, which is oblique to the direction of incidence 36.
  • the width of the hole at the bottom 46 is less than the width at the top 44.
  • the width at the bottom is B1 in Fig. 3c entered.
  • the laser radiation modifies at the upper edge 44 and at the lower edge 50 the coatings 40, 42 applied there, so that a colored edge 50 on the rear side 16 and a colored edge 52 on the front side 14 for the hole 24 result.
  • a color edge width C1 at the bottom colored edge 50 and a color edge width C2 at the top colored edge 52 are shown by the Fig. 3a explained effect of the intensity distribution of the laser beam 34th certainly. Also by the intensity distribution of the laser beam and thus its cutting action and equally by the thickness of the carrier 38, an offset D1 between the lower and upper colored edge 50, 52 is determined.
  • This offset D1 can, as in Fig. 3c be registered, be positive. But it can also be negative, ie the lower colored edge 50 and the upper colored edge 52 overlap when viewed along the direction of incidence 36. This offers a person of design options with regard to the logo 26 in plan view or review.
  • the colored edge 50 may have a different color than the colored edge 52.
  • a negative offset D1 the hole is shown in three-color outline.
  • the color of the lower edge 50 is shown in an inner area.
  • the color of the upper colored border 52 In the area of the negative offset D1, the mixture is shown the two colors. As a result, the hole 24 is trimmed in three colors.
  • Fig. 4 shows a further embodiment in which the laser beam 34 does not produce a hole 24 but a depression 54.
  • the laser beam exiting at the rear side 16 there still has an energy above the minimum energy E 2, at least in sections below the depression 54, which is required to produce the color effect in the coating 42. It thus turns on the bottom 16 a color zone 56, which lies in a precise position to the recess 54.
  • the recess 54 may be used as a scratch on the front side 14 to modify the optical impression of the carrier 38 from the front side 14.
  • the optional coating 40 on the front side 14 is provided. It thus sets at the top of a colored edge 52 of the recess 54, which is also in precise register position to the ink zone 56.
  • the ink zone 56 has an extent D2, which is predetermined by the intensity distribution of the laser beam 34 in combination with the thickness of the carrier 38 and optionally the cutting speed (as explained above).
  • the upper colored edge 56 has a width C2, again with an offset D1, which may also be positive or negative.
  • Fig. 4 shows that there are portions of the depression 54 under which no ink zone 56 lies. These are those portions where the energy of the laser beam as it exited the backside 16 was insufficient to modify the coating 42 in color. This makes it possible to thin out the carrier 38 in areas, ie to reduce its thickness, without producing a color zone 56 underneath.
  • the structuring of the color markings in the coatings 42 and, if present 40 does not depend on a structured application of the coatings, but is generated by the laser radiation.
  • a combination with a structured application of the coatings is possible to achieve an additional structuring of motifs.
  • the embodiment of the Fig. 4 allows a scratching of the front side 14 of the carrier 38, which is in register with the ink zone 56 on the back 16 and, if provided, also to a colored edge 52 on the front side 14 of the carrier 38th
  • the coatings on the front and back can use various laser-sensitive marking substances. It is possible to provide a first fabric at the front and back showing a first color change. It is also possible to use a first fabric with a first color change at the front and a second fabric with a second color at the back. In addition, this can be combined with laser energies / cutting speeds, which ensure that the fabric is removed so that the original color of the fabric no longer exists. This can be considered as a third color change, which is ultimately an ablation of the substance.
  • a fabric may be used which requires less energy to change the color.
  • This substance is referred to below as the second substance.
  • it is combined with a first substance which has a higher reaction enthalpy.
  • These fabrics are included in combination in the front 14 and rear 16 coatings. If the energy input on the front side 14 is very high, the second substance, which has a lower reaction enthalpy than the first substance, is destroyed by the excessive energy input while the first substance is retained. As a result, the recess 20 is then surrounded at the front 14 by a colored edge whose color is determined by the first material.
  • the color effect is effected exclusively by the second substance.
  • the color effect is different.
  • the second material for example, its color effect can be omitted.
  • the color effect of the first fabric may be absent and that of the second fabric may be absent.
  • the result is a color-structured outline 18 on the rear side 16, which was structured exclusively by the variation of the intensity of the laser radiation during the irradiation from the front side 14 with regard to their multicolor.
  • Fig. 5 shows a possible embodiment of the security feature of the front 14 and the back 16, in which only two different markings are generated in an outline 18.
  • the embodiment of the Fig. 5 is thus a simplification of the version according to Fig. 2 .
  • the back 16 is accordingly in the outline 18, a gap 32, the colored edge corresponding to the edge 50 of Fig. 3c has, or a color mark 28, which the color zone 56 of the Fig. 4 equivalent.
  • Fig. 5 shows at the front side 14 for the letter "P” a regular sequence of depressions 20 and gaps 22, for the letter “L” an at least partially irregular sequence to illustrate that both variants are possible.
  • the gaps 22 are generated with a laser beam energy which is higher than that for the production of the depressions 20.
  • the contour line 18 is formed with a locally varying energy along the contour of the laser radiation 34.
  • the sequence of gaps 32 with colored edge 50 and color markings 28 corresponding to the color zones 56 then appears on the rear side 16.
  • the variation in intensity may also cause the color effect on the colored edge 50 of the gaps 32 to differ in color from the color effect of the ink zones 56 forming the color marks 28.
  • the outline 18 on the back 16 is colored in color.
  • This can be done additionally or alternatively on the front side 14. This is basically achieved by a substance or a combination of substances showing a different color change depending on the intensity of the laser radiation.
  • the color change of the coating 40 and / or 42 depends on the intensity of the laser radiation.
  • Fig. 6 shows an embodiment similar to that of Fig. 4 ,
  • a security thread 58 or patch or film element into which / a recess 60 is introduced by means of the laser radiation is additionally adjacent the location at which the recess 54 is introduced, provided on the coating 40, a security thread 58 or patch or film element into which / a recess 60 is introduced by means of the laser radiation.
  • This recess ensures that a color zone 62 forms in the coating 40 below the point at which the laser radiation is irradiated.
  • the security thread 58 reacts differently to the laser radiation.
  • the conditions are such that the recess 54 and the recess 60 were generated with identical laser beam parameters and still result in different depths. This facilitates the laser control.
  • the ink zone 62 is clearly visible from above. The same applies with appropriate transparency of the carrier 38 from the bottom.
  • Fig. 7 shows a modification of the construction of Fig. 3c , wherein now on the front side 14 no coating 40 is provided.
  • the carrier 38 is provided only on the back 16 with the coating 42.
  • the colored edge 40 results only in the area of the hole 24 and only on the rear side 16 of the carrier 38.
  • This embodiment can, as in Fig. 7 shown, optionally supplemented by the fact that on the front side 14 again a security thread 58, patch or film element is applied, in / by means of the laser radiation, a hole 64 is incorporated, which extends as a recess 66 in the carrier 38.
  • the laser radiation results in turn on the back 16, a color zone 68 in exact Pass réelle to the hole 64 in the security thread 58th
  • Fig. 8 shows a combination of the features of the embodiments of FIGS. 6 and 7 ,
  • the coating 40 is thus located on the front side 14, so that the laser radiation around the hole 24 forms colored edges 52 on the front side and 50 on the rear side of the carrier 38.
  • a security thread 58, patch or film element is arranged on the front side 14 on the coating 40 into which the laser radiation has introduced the hole 64, which extends into the carrier 38 as a depression 66.
  • a color edge 70 which surrounds the hole 64 or the recess 66, is formed. This color edge 70 and the ink zone 68 are in exact register to the hole 64th

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Electromagnetism (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Optics & Photonics (AREA)
  • Laser Beam Processing (AREA)
  • Credit Cards Or The Like (AREA)
EP17000208.3A 2016-02-24 2017-02-10 Procédé de fabrication d'un élément de sécurité Not-in-force EP3243669B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL17000208T PL3243669T3 (pl) 2016-02-24 2017-02-10 Sposób wytwarzania elementu zabezpieczającego

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102016002120.9A DE102016002120A1 (de) 2016-02-24 2016-02-24 Sicherheitsmerkmal und Verfahren zu dessen Herstellung

Publications (3)

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EP3243669A2 true EP3243669A2 (fr) 2017-11-15
EP3243669A3 EP3243669A3 (fr) 2018-02-28
EP3243669B1 EP3243669B1 (fr) 2021-12-08

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EP (1) EP3243669B1 (fr)
DE (1) DE102016002120A1 (fr)
ES (1) ES2901951T3 (fr)
PL (1) PL3243669T3 (fr)

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Publication number Priority date Publication date Assignee Title
CN112770914A (zh) * 2018-08-24 2021-05-07 海德希德有限责任公司 安全页和安全小册子

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DE102017000124A1 (de) 2017-01-09 2018-07-12 Giesecke+Devrient Currency Technology Gmbh Sicherheitselement mit gelaserter Oberfläche

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EP0290750B1 (fr) 1987-03-19 1994-01-19 Xytronyx, Inc. Systèmes pour la visualisation de l'exposition à la lumière ultra-violette et pour l'emploi de la lumière UV pour obtenir des changements de couleur
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US7485403B2 (en) 2001-03-16 2009-02-03 Datalase Ltd. Laser-markable compositions
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US8048608B2 (en) 2006-06-08 2011-11-01 Datalase Ltd. Laser marking
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WO2010007232A1 (fr) 2008-06-23 2010-01-21 Bionetwork Nouvelles formes pharmaceutiques à effet rapide et les utilisations de composition pharmaceutiques ainsi obtenues
EP2332012B1 (fr) 2008-09-10 2014-07-09 DataLase Ltd Compositions activées par une énergie
WO2010072329A1 (fr) 2008-12-22 2010-07-01 Giesecke & Devrient Gmbh Support de données à zone transparente
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Publication number Priority date Publication date Assignee Title
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CN112770914B (zh) * 2018-08-24 2022-06-21 海德希德有限责任公司 安全页和安全小册子
CN112770914B9 (zh) * 2018-08-24 2022-08-19 海德希德有限责任公司 安全页和安全小册子
US11745533B2 (en) 2018-08-24 2023-09-05 Hid Cid Limited Security sheet and a security booklet

Also Published As

Publication number Publication date
EP3243669B1 (fr) 2021-12-08
ES2901951T3 (es) 2022-03-24
DE102016002120A1 (de) 2017-08-24
PL3243669T3 (pl) 2022-02-07
EP3243669A3 (fr) 2018-02-28

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