DE102015005672A1 - Security feature and method for its manufacture - Google Patents

Abstract

The invention relates to a method for producing a security feature for a security element, a security paper or a data carrier which has a carrier (18), wherein the carrier (18) is provided with a marking substance (19) which is irradiated by laser radiation (44) Color is modifiable, are introduced by the action of the beam cross section (30) intensity laser radiation (44) holes (16) of certain hole diameter (C) in the carrier (18) having an edge, wherein at the same time due to the intensity distribution (30) the beam cross section in a zone (20) of certain zone width (A) surrounding the edge is modified by the laser radiation (44) so that the edge is colored, the holes (16) perforating a surface (14) and within the area (14), all the adjacent holes are arranged in a hole center (D) related to the hole center which is not larger is 2.5 times the sum of maximum hole diameter and double zone width (A).

Description

The invention relates to a method for producing a security feature for a security element, a security paper or a data carrier, which has a carrier, wherein the carrier is modifiable by laser radiation in terms of its color, introduced by the action of laser beam in the beam cross-section intensity laser holes of certain hole diameter in the carrier be having an edge, wherein at the same time due to the intensity distribution over the beam cross section in a zone surrounding the edge of certain zone width of the carrier is modified by the laser radiation, so that the edge is colored. The invention further relates to a security feature for a security element, a security paper or a data carrier, which has a carrier that is modifiable in color, in the carrier holes of certain hole diameter are introduced, which have an edge, and in a surrounding zone of the edge certain zone width of the carrier is modified so that the edge is colored, as well as a security element, a security paper and a document of value or a data carrier with such a security feature.

Identity cards, such as credit cards or identity cards, are often laser engraved with an individual label. Also, the creation of continuous openings in value documents, z. As banknote papers, by laser cutting has been known for some time. For example, in the document DE 43 34 848 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 process. The support of the security feature is provided with a marker that changes its color by the action of laser beams. To produce the hole or holes, a cutting laser beam is used whose intensity is non-uniformly distributed in the radiation 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. This drop in intensity produces an edge at which the support is no longer cut, but a modification of the marking substance takes place with regard to its color effect. In this way, the edge region of the hole produced by laser radiation appears colored.

A colored border of holes is also from the WO 2009 / 003588A1 However, 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 000002332012 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 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.

This object is 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 is modifiable by laser radiation in terms of its color, by acting in the beam cross-section intensity-distributed laser radiation holes of a certain hole diameter in the carrier are introduced, which have an edge, wherein at the same time due to the intensity distribution over the beam cross section in a zone surrounding the edge zone width of the carrier is modified by the laser radiation, so that the edge is colored, the holes are arranged covering a surface and within the Area all adjacent holes are arranged in a relation to the hole center hole spacing from each other, which is not greater than 2.5 times the sum of maximum hole diameter and double zone width.

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 is modifiable by laser radiation in terms of its color, by the action of laser beam in the beam cross-section intensity laser holes of certain hole diameter in the Carrier are introduced, which have an edge, wherein at the same time due to the intensity distribution over the beam cross section in a zone surrounding the edge zone width of the carrier is modified by the laser radiation, so that the edge is colored, the holes are arranged covering a surface and within the area the holes make up at least 50% of the size of the area.

The object is also achieved by a security feature for a security element, a security paper or a data carrier having a carrier, wherein the carrier is modifiable in terms of its color by laser radiation, in the carrier holes of certain hole diameter are introduced, which have an edge, and in a zone of certain zone width surrounding the edge, the support is modified so that the edge is colored, the holes being arranged overlapping one surface and within the surface all adjacent holes are arranged in a hole center distance spaced from each other which is not larger as 2.5 times the sum of maximum hole diameter and double zone width.

The object is also achieved by a security feature for a security element, a security paper or a data carrier having a carrier, wherein the carrier is modifiable in terms of its color by laser radiation, in the carrier holes of certain hole diameter are introduced, which have an edge, and in a zone of certain zone width surrounding the edge, the carrier is modified such that the edge is colored, the holes covering one surface and within the surface the holes make up at least 50% of the size of the surface.

The principle of the invention thus provides to perforate the surface, wherein said geometric specifications are met.

The invention uses a special arrangement of the holes in the perforated surface to those in the WO 2009/003587 A1 to reinforce and emphasize the color effect described. The term "color" is not limited to a colorful impression, but may also include black. The inventive perforation of the surface creates a colorful impression without a viewer would have to search for a colored hole edge first, which could well be the case with a single hole or a single opening. In transmitted light, on the other hand, a transparent impression is conveyed. The arrangement of the holes such that adjacent holes have a hole spacing that does not exceed a certain level, the colored impression is particularly well perceived in plan view of the surface. Thus, according to the invention, several holes interact with regard to the colored impression.

The color effect is achieved in some embodiments by using a support that is directly modifiable with the laser radiation. In other embodiments, the carrier is previously provided with a suitable marker, e.g. B. coated, which is modifiable.

The color effect becomes stronger, the smaller the distance between the hole edges, that is, the denser the perforation of the surface. By the reference of the hole distance to the hole center, so the indication of the hole spacing as the distance between the hole centers of adjacent holes, the feature achieved that the related to the hole center hole spacing is not greater than 2.5 times the sum of hole diameter and double zone width in that the color-changed zones have a comparatively large proportion of the perforated area. This ensures a particularly good color impression. It increases naturally, the higher the proportion of the color-coded zones on the remaining support surface. Therefore, it is alternatively provided that this proportion is at least 50%, preferably even 75% or 90%. Ideally, there is a minimum gap between the adjacent holes that is twice the zone width. In the area of this minimum gap, color-coded zones then encounter each other directly. Of course, due to the circular geometry of the holes created by the laser beam, there are areas between adjacent holes where the minimum gap is not present. The minimum gap exists on the connecting line between the hole centers.

The perforated surface according to the invention appears colored in plan view due to the color effect, for. By the tag modified in the zones around the holes. At the same time, there is also a motive in transmitted light due to the perforation of the surface and the thus changed translucency. These two motifs are in perfect register with each other, since they were created by the same process namely the perforation of the surface.

The perforated surface is larger in the x and y direction than a hole. It is therefore a two-dimensional area in which holes are juxtaposed in both coordinate directions.

The provision of a marker, however, is not relevant to the passport of these two motifs. In principle, it is possible to provide the marking substance over the entire area in a much larger area than the perforated area occupies. In a further development, the application or provision of the marking substance and the structure of the perforated surface are combined in such a way that no marking substance is present in individual parts of the surface. In these parts, the holes then have no colored border. In the remaining parts, however, the marker is present and the edges of the holes are colored. This gives another appearance of the security feature that is difficult to imitate. If the marker dye is provided or printed only in some areas, you will only see them in reflected light Areas the colored structure of the motive and not in others. This encourages viewing in transmitted light.

By varying the hole spacing, the surface can convey a certain design impression. It is therefore preferred in a development that the surface has a first and at least one second pattern, which differ with respect to the grid structure in which the holes are arranged, and / or the hole diameter and / or the hole spacing.

The laser-radiation-modifiable carrier or its marking substance is modified by the laser beam when the holes are introduced into the carrier. In this case, use is made of the fact that 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 holes. In this way, a perfect registration of openings and laser radiation-modified zone is automatically ensured.

If you want to provide the carrier with the marker, it is coated in an advantageous variant of the invention on its surface with the marker, for example by a printing process. According to another likewise advantageous variant of the invention, the marking substance is introduced into the volume of the carrier. Depending on the carrier material, different methods are available.

If the carrier is formed from paper, the marker can advantageously be mixed with the sheet formation of the paper pulp. Another advantageous possibility is to introduce the marker in a dip in the volume of the paper substrate or the paper substrate, for. B. in a size press to impregnate with the marker.

Of course, a carrier may also be laser-irradiated without additional tagging material. A blackening by a thermal effect is just one example of this. If the carrier is formed from a plastic film, z. B. the film may be formed thermoreactive or the marker can already be introduced in the production of the film or subsequently by an impregnation step in the volume of the film.

As a marker material come into question with advantage whose visible color is changed by the action of the laser radiation. For example, thermoreactive colored pigments such as ultramarine blue can be used for this purpose. Advantageously, it is also possible to use 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. It is also possible to use a combination of different marking substances, for example in order to enable both a visual and a machine authenticity check of the security feature. When using several markers, these can come to lie next to each other as well as in different layers one above the other. Alternatively, in one embodiment of the invention, the modification of the carrier / marker may be erosion or destruction. The marker is preferably a metallic coating in this case.

In an advantageous procedure, holes are produced with an oblique cutting edge by the laser cut in the carrier. An oblique cutting edge can be ensured, for example, by guiding the laser beam at a predetermined angle to the surface normal of the carrier when producing the openings. Depending on the selected cutting angle, the size of the edge zone can be set, as will be explained in more detail below.

According to an advantageous variant of the invention, 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. Also, 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 with Laser radiation in the ultraviolet, visible or infrared spectral range, for example, take place with a CO2 laser of a wavelength of 10600 nm.

In a further likewise advantageous variant of the invention, a pigment-free laser-radiation-modifiable marker is used. Also, pigment-free markers can be applied, for example as intaglio or printing ink, to the carrier or introduced into the carrier volume. 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 10600 nm radiation of a CO2 laser. Specific, non-limiting examples of pigment-free laser-modifiable markers are in the references 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 having a security feature produced according to the method described, wherein the security element has a carrier into which a surface is perforated by the action of laser radiation and which can be modified by laser radiation. 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.

In addition, the invention also includes a security paper for the production of documents of value or the like with a security feature produced by the described method, wherein the security paper has a carrier which has a surface which is perforated by the action of laser radiation and which is laser radiation modifiable. Instead of introducing the holes directly into the security paper, this can also be provided with a security element of the type described above. 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.

Further exemplary embodiments and advantages of the invention are explained below with reference to the figures, in the representation of which a representation true to scale and proportion has been dispensed with in order to increase the clarity.

Show it:

1 a schematic representation of a banknote with a security feature,

2 a close attention to the security feature of 1 .

3 (a) - (c) to explain the production of the security feature, wherein

3 (a) schematically a spatial energy distribution of a laser beam, 3 (b) a spatial distribution of the heat energy generated during cutting, and in 3 (c) shows in detail the dimensions of holes produced by the laser beam,

4 a detailed view of the security feature,

5 (a) - (C) cross-sectional views of a hole of the security feature, wherein 5 (a) the situation before the irradiation of the laser radiation shows and 5 (b) and (C) show two holes with different width edge effect, and

6 and 7 Supervision of a security feature according to further embodiments.

The invention will be explained using the example of a banknote. 1 shows a schematic representation of a banknote 10 with a security feature 12 , 2 in detail the security feature 12 out 1 , which is provided with a variety of laser holes with a border effect.

In 2 is the security feature 12 , this in 1 is shown only schematically, shown in more detail. It covers an area fourteen by introducing a variety of holes 16 is perforated. The area fourteen is in the embodiment of 2 multi-part, so that the outline of an elephant and an elephant baby in front of a semi-circular background surface results. The arrangement of the holes 16 in the paper 18 covers the area fourteen , Every hole 16 is generated by a laser beam, wherein preferably used in the production of pulsed laser radiation.

Before the introduction of the holes 16 became the paper 18 at least in the area of the area fourteen provided with a marker, which is modifiable by the action of laser radiation in terms of a color effect. For example, the marker substance has effect pigments which, when suitably irradiated, change from a transparent, non-colored state to a red state. Every hole 16 has an edge where there is a zone in which the marker has been modified. This was done by the action of laser radiation, ie the insertion of a hole and the modification of the marker at the edge happens for each hole 16 simultaneously.

The principle of simultaneous creation of holes 16 and their border design is in 3 (a) illustrated. 3 (a) shows by way of example a substantially Gaussian spatial intensity distribution 30 a laser beam. The fluence therefore decreases from the center to the edge.

In an inner area, a cutting area 32 , the laser beam intensity exceeds that for cutting the paper 18 required minimum energy E1. With E2 is in 3 (a) denotes a reaction energy of the effect pigments of the marking substance, when said color change occurs beyond said. As can be seen directly from the figure, lies in an outer region of the laser beam profile, a marking area 34 that need fluence between the energy required for the color change E2 and the energy required for cutting minimum energy E1, so that in this area 34 a color change of the effect pigments is induced, the paper 18 but not cut.

The paper 18 therefore, when laser cutting by the laser beam in a zone at the edge of each hole 16 in perfect registration to the hole 16 discolored. The width of the colored zone at the edge corresponds to the width of the marking area 34 and depends on the intensity distribution 30 about the beam cross-section, in this case the reaction energy of the effect pigments used and the material properties of the paper 18 from.

Outside the cutting area 32 and the marking area 34 the laser beam intensity is below the reaction energy of the effect pigments, so that the paper 18 there is not changed color.

The laser radiation modifiable marker 19 can on the paper 18 applied, for example, be printed (see. 3 (c) ), or can be introduced into the volume. This can already be done in paper production by admixture of the effect pigments to paper pulp in sheet formation or subsequently in a dip or by impregnation, for. B. in a size press.

As effect pigments, which change their visible color by the action of the laser radiation, for example, thermoreactive color pigments, such as ultramarine blue, come into question.

It is understood that two or more effect pigments with different threshold energies or a combination of visually and mechanically detectable effect pigments can also be used to produce a plurality of registered edge effects.

Instead of the effect pigments described by way of example, it is also possible to use a pigment-free laser-radiation-modifiable marker. Even such markers can, for example as intaglio or printing ink, on the paper 18 printed or incorporated in its volume. Non-pigmented, laser-radiation-modifiable coatings can have a very high transparency in the unlabeled state. By the action of laser radiation, for example a CO2 laser at 10600 nm, high-speed and high-contrast markings, for example a black inscription in the coating, can be produced.

In addition to the modification of the marker 19 by the laser radiation itself also comes a modification of the paper 18 himself in question.

It is also possible that the heat generated during laser cutting causes the modification. In this way, the modified edge area of the opening may optionally be even larger than the beam extent, as in FIG 3 (b) clarified.

3 (b) shows schematically the spatial distribution 30 ' the heat energy, which when cutting an opening with the laser beam of 3 (a) is produced. As if from a comparison of 3 (a) and (b) immediately apparent, the heated area may extend beyond the jet diameter due to heat conduction.

As already at 3 (a) described, the paper becomes 18 in the cutting area 32 cut, since there the laser energy E exceeds the threshold energy required for cutting E1. Responds to the paper 18 or the marker 19 now at least also on the heat energy generated when cutting, so results in the for 3 (b) assumed conditions a marking area 34 whose extent can easily be greater than the cross section of the laser beam. E2 'denotes in this case the reaction energy required to do so, when the desired color change is exceeded,

It is optionally also possible that the marker 19 is removed or destroyed immediately next to the cutting edge, and is modified only from a certain small distance from the cutting edge.

3 (c) shows the effect of the laser beam with the intensity distribution 30 on the paper 18 , In this embodiment, the paper is 18 with the marker 19 coated. A laser beam 44 cuts a hole 16 with a hole diameter C, where the hole in cross section, as in 3 (d) to see, exemplary conical runs. As hole diameter is in 3 (d) the minimum hole diameter C is entered, located at the exit side of the laser beam 44 from the paper 18 results. On the inlet side, one obtains a maximum hole diameter which is greater by a two-fold removal width B than the minimum hole diameter C. Die The sum of C and 2B gives the maximum hole diameter, which will be referred to below as (C + 2B).

Due to the non-uniform, falling to the edge of the beam cross-section intensity distribution 30 you create a zone 20 in which the fluence of the laser beam 44 above the reaction energy E2 or E2 'mentioned above, but below the minimum energy required to perforate the paper 18 is necessary. This area becomes the marker 19 modified, leaving an annular zone 20 is created that the hole 16 at the entrance side of the laser beam 44 surrounds and which is marked in color. The hole 16 shows a colored border in plan view.

So that the edges of several holes 16 together give a well perceived color impression, the holes become 16 in the perforated area fourteen relatively staggered, like 4 shows. In 4 are the holes 16 an example in a hexagonal arrangement, in which the hole spacing D, the distance between the centers of individual holes 16 is designated, so that the areas of the edge effect just touch. The hole spacing D thus corresponds to the dimension (C + 2B) + 2A of 3 (c) , This is a marginal effect diameter E of 4 , The holes 16 are in 4 arranged exactly at this distance E.

The colored impression in the reflected light, reflected in the consideration of the area 16 by the juxtaposition of zones 20 adjusts, of course, is retained in other hole arrangements and hole spacing. From a hole spacing of the order of 2.5 times the rim diameter E, ie 2.5 times the sum of the maximum hole diameter (C + 2B) plus 2 times the zone width A, the colored impression becomes insufficient.

A green edge effect can be generated, for example, with the aid of the marking substance Manganese Ferrite F9900 M. Its color change goes from gray to green. Of course, other color changes are conceivable, for. B. also from red to gray with the dye oxides Red PR222. Both dyes are from Cathay Industries.

Essential for creating the zone 20 towards the edge it is that the laser beam 44 has an intensity distribution that is not constant, so has no top hat profile. Each intensity profile, where the intensity of the laser beam 44 decreases toward the edge of the beam cross-section with respect to the maximum value, can for generating a zone 20 Of course, the nature of the intensity profile is based on the width of the zone 20 relative to the maximum hole diameter (C + 2B) of each hole 16 effect.

Is the laser beam an oblique hole edge in the paper 18 generated, the edge effect can also be formed along the entire hole edge, as in 5 can be seen if the marker 19 not just on the surface, but in the volume 42 of the paper 18 is introduced, as is in 5 (a) is shown, or the paper 18 is modified directly.

By applying the paper 18 with the laser radiation 44 becomes an oblique hole edge 46 generated like that 5 (b) and (c) show. The one for the reaction of the paper 18 / Tracer 19 required energy threshold is doing in an edge area 48 along the sloping edge of the hole 46 exceeded and the paper / marker modified. Depending on the beam profile of the laser beam 44 becomes a narrower or wider modified border area 48 generated like that 5 (b) and (c) illustrate.

The 5 (a) to (c) show by way of example only the creation of a hole 16 , and also with the marker 19 provided volume is shown only for a hole. This was done for the sake of simplicity of illustration only. In fact, of course, the holes are as in 4 shown closely spaced in the area 19 intended.

Instead of leaving the hole spacing constant, a certain design impression can be obtained by varying the hole spacing of the perforation. For example, it is possible in the area of the background of the area fourteen of the 2 upward to increase the hole spacing gradually. As a result, the color impression decreases towards the top, as in the area fourteen Area components increase, not a zone 20 wear. In this way, for example, using a red-dyeing dye, the impression of a sunset can be generated. A red coloration can be achieved, for example, by a coating with the dye Polyplast PY-383.

Will, as in 6 represented, the marker 19 partially in the area fourteen not provided, for example, not printed, shows in Auflichtlichtachtrachtung only this part of the area fourteen coloured. This stimulates observation in transmitted light, in which then the entire motif, which through the perforated surface fourteen is coded shows. 6 shows exemplary strip-shaped areas 22 in which the marker substance 19 is missing.

7 shows a development in which in the area fourteen different motives through different patterns 24 . 26 and 28 are displayed, which differ in their geometry. In the picture is a pentagonal for the background, for the elephant a square and for the Elephant baby used a hexagonal hole arrangement. As a result, the patterns stand out from each other in a transparent manner, whereas in supervision a largely uniform color impression can be achieved. Alternatively, also in the case of comparatively large holes which are to be resolved by the eye, a good recognition of the three patterns can be seen in a transparent manner 24 . 26 and 28 whereas there is no distinction in supervision. The geometry differences may also affect other parameters, as explained in the general part of the description.

In the present case, the substrate of the banknote has been exemplified by a paper 18 mentioned. Of course, as a substrate, a film or the like may be used, which may be used, for example, in a window portion of a bill.

LIST OF REFERENCE NUMBERS

10

bill

12

safety feature

14

area

16

hole

18

paper

19

tracer

20

Zone

22

Area

24, 26, 28

template

30

intensity distribution

30 '

Thermal energy distribution

32

cutting area

34, 34 '

marking region

42

volume

44

laser radiation

46

hole edge

48

border area

A

Color effect Width

B

Abtragsbreite

C

Hole diameter

D

hole spacing

e

Edge effect diameter

E1, E1 '

minimum energy

E2, E2 '

reaction energy

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 4334848 C1 [0002]
• WO 2009/003587 A1 [0003, 0012]
• WO 2009/003588 A1 [0004]
• EP 1657072 B1 [0005]
• EP 000002332012 B1 [0005]
• US 7270919 [0005]
• US 7485403 [0005]
• US 7998900 [0005]
• US 8021820 [0005]
• US8048608 [0005]
• US8048605 [0005]
• US8083973 [0005]
• US 8101544 [0005]
• US 8101545 [0005]
• US 8105506 [0005]
• US 8173253 [0005]
• US 8178277 [0005]
• US 8278243 [0005]
• US 8278244 [0005]
• US 842028 [0005]
• WO 02/101462 A1 [0026]
• US 4343885 [0026]
• EP 0290750 B1 [0026]

Claims (17)

Method for producing a security feature for a security element, a security paper or a data carrier, wherein a carrier ( 18 ) provided by laser radiation ( 44 ) is modifiable in terms of its color, by acting in the beam cross-section ( 30 ) intensity-distributed laser radiation ( 44 ) Holes ( 16 ) of certain hole diameter (C) in the carrier ( 18 ) are introduced, which have an edge, wherein at the same time due to the intensity distribution ( 30 ) over the beam cross-section in a zone surrounding the edge ( 20 ) of certain zone widths (A) of the beams ( 18 ) by the laser radiation ( 44 ) is modified so that the edge is colored, characterized in that the holes ( 16 ) an area ( fourteen ), whereby within the area ( fourteen ) all adjacent holes ( 16 ) at a hole center (D) hole distance not larger than 2.5 times the sum of maximum hole diameter (C + 2B) and double zone width (A). A method according to claim 1, characterized in that the hole spacing (D) is not greater than twice the sum of maximum hole diameter and double zone width (A). Method for producing a security feature for a security element, a security paper or a data carrier, wherein a carrier ( 18 ) provided by laser radiation ( 44 ) is modifiable in terms of its color, by acting in the beam cross-section ( 30 ) intensity-distributed laser radiation ( 44 ) Holes ( 16 ) of certain hole diameter (C) in the carrier ( 18 ) are introduced, which have an edge, wherein at the same time due to the intensity distribution ( 30 ) over the beam cross-section in a zone surrounding the edge ( 20 ) of certain zone widths (A) of the beams ( 18 ) by the laser radiation ( 44 ) is modified so that the edge is colored, characterized in that the holes ( 16 ) an area ( fourteen ), whereby within the area ( fourteen ) the holes ( 16 ) account for at least 50% of the size of the area. Method according to one of the above claims, characterized in that between the adjacent holes ( 16 ) there is a minimum gap equal to twice the zone width (A). Method according to one of claims 1 to 4, characterized in that the surface is a first pattern ( 24 ) and at least one second pattern ( 26 . 28 ), which differ with regard to the grid in which the holes are arranged and / or the hole diameter (C) and / or the hole spacing (D). Method according to one of claims 1 to 5, characterized in that the carrier ( 18 ) is provided by the wearer ( 18 ) with a marker ( 19 ) provided by the laser radiation ( 44 ) is modifiable in color. A method according to claim 6, characterized in that the marker ( 19 ) on the carrier ( 18 ), whereby only a part of the area ( fourteen ) so that only part of the holes ( 16 ) the area ( fourteen ) has the colored border. Security feature for a security element, a security paper, or a data medium containing a carrier ( 18 ), wherein the carrier ( 18 ) in terms of its color by laser radiation ( 44 ) is modifiable into the carrier ( 18 ) Holes ( 16 ) of certain hole diameter (C) having an edge and in a zone surrounding the edge ( 20 ) of certain zone widths (A) of the beams ( 18 ) is modified so that the edge is colored, characterized in that the holes ( 16 ) an area ( fourteen ) and within the area ( fourteen ) all adjacent holes ( 16 ) are spaced from each other in a hole center (D) centered on the hole center which is not larger than 2.5 times the sum of maximum hole diameter (C + 2B) and double zone width (A). Security feature according to claim 8, characterized in that the hole spacing (D) is not greater than twice the sum of the maximum hole diameter (C + 2B) and the double zone width (A). Security feature for a security element, a security paper, or a data medium containing a carrier ( 18 ), wherein the carrier ( 18 ) in terms of its color by laser radiation ( 44 ) is modifiable into the carrier ( 18 ) Holes ( 16 ) of certain hole diameter (C) having an edge and in a zone surrounding the edge ( 20 ) of certain zone widths (A) of the beams ( 18 ) is modified so that the edge is colored, characterized in that the holes ( 16 ) an area ( fourteen ) and within the area ( fourteen ) the holes ( 16 ) at least 50% of the size of the area ( fourteen ) turn off. Security feature according to one of claims 8 to 10, characterized in that between the adjacent holes ( 16 ) there is a minimum gap equal to twice the zone width (A). Security feature according to one of claims 8 to 11, characterized in that the surface ( fourteen ) a first pattern ( 24 ) and at least one second pattern ( 26 . 28 ), which is with regard to the grid in which the holes ( 16 ) are arranged, and / or the hole diameter (C) and / or the hole spacing (D) differ. Security feature according to one of claims 8 to 12, characterized in that the carrier ( 18 ) with a marker ( 19 ) provided with respect to its color by laser radiation ( 44 ) is modifiable. Security feature according to claim 13, characterized in that the marker substance ( 19 ) only a part of the area ( fourteen ) so that only part of the holes ( 16 ) has the colored border. Security element for security papers, value documents and the like with security feature ( 10 ) according to one of claims 8 to 14. Security paper with a security element according to claim 15. Value document or data medium, in particular banknote ( 10 ) or identity card, with a security element according to claim 15.

Images