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
  • B42D25/20—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

Definitions

• the invention relates to an object of value, in particular a document of value such as a banknote, with at least one security element arranged on a surface and comprising a printed image, the printed image containing at least two different colors, at least one of which has thermochromic properties, and such a security element. Furthermore, the invention relates to a method for producing a printed image and a method for producing a valuable object with such a security element arranged on a surface.
• An object of value in the sense of the invention can be any object intended to be protected, such as branded articles or documents of value.
• Documents of value in the sense of the present invention are in particular banknotes, but also checks, check cards, credit cards, ID cards, passports, entrance tickets, tickets and the like.
• thermochromic materials which change their color and / or their transmissibility when there is a change in temperature and are transparent, for example, in a certain temperature range and opaque in another temperature range.
• EP 0 608 078 AI describes a security thread which has a thermochromic coating. Under the coating there can be another print, which can be visually perceived, for example, at a certain temperature at which the thermochromic coating becomes transparent. It is an object of the present invention to provide security elements and valuables which have increased counterfeit security in comparison with the prior art.
• the printed image has at least one printed image element which is at least partially micro-printed, in which at least two colors are arranged in register with one another, at least one color has thermochromic properties and the colors are in register with at least partial areas or at least in partial areas overlapping one another.
• microprint is understood to mean a print which has lines with line widths of a maximum of approximately 500 ⁇ m.
• the printed image element preferably has lines with line widths of less than 200 ⁇ m, particularly preferably less than 100 ⁇ m, particularly preferably less than 50 ⁇ m.
• the printed image element embodied in micro-printing can, moreover, be any pattern, image motif, lettering or the like. act.
• the printed image element contains interlaced lines, for example guilloches, is particularly preferred, since a precise two-color or multi-color printing of such line patterns is particularly difficult and tamper-proof.
• thermochromic color that does not differ at normal temperature from the color used for the lines outside this area. However, when the area is warmed, the thermochromic color changes and creates a visible sign within the line pattern.
• thermochromic color which becomes invisible when heated and thereby, for example, a section printed in this color disappears within an overall image. When it cools down, the image then re-registers.
• the colors can be arranged precisely in adjacent areas within the printing element, so that the areas meet directly, but do not overlap.
• the different colors it is also possible for the different colors to be applied in overlapping areas within the printed image element, so that they form a color gradient. For example, by using a blue color and by using a thermochromic color, which changes from green to red when heated, a color gradient from blue to green could be displayed at normal temperature, which changes from blue to red when heated.
• the different colors are printed in a single printing process with a printing form, i. H. within a printing unit, printed.
• a printing form i. H. within a printing unit.
• All printing techniques are therefore particularly suitable in which it is possible to apply the colors specifically to the printing form before printing, such as intaglio, offset, letter set or letterpress processes.
• these different colors are preferably applied in a targeted manner to adjacent areas on the printing form. This is, for example, when using A gravure printing process can be achieved by applying several colors side by side to the printing plate in a "color step technique" using stencils.
• the stencils can be cut into any shape so that the edge between the differently colored areas can also run as desired.
• the different colors are preferably applied to overlapping areas of the printing form before printing.
• the iris printing process is suitable for this, in which the ink is applied to specific areas of a printing roller by means of additional rollers. If two colors are applied side by side, the desired color transition can be achieved by rubbing these colors on the roller.
• thermochromic ink be printed together with a non-thermochromic ink, but that a combination of two thermochromic inks is also possible, but it should be ensured that these have different color / temperature dependencies a clearly recognizable optical effect occurs for the viewer.
• FIG. 1 shows a top view of a sample banknote with various printing picture elements which are executed in micro-printing
• FIG. 2 shows an enlarged illustration of section A from FIG. 1,
• FIG. 3 shows an enlarged illustration of section B from FIG. 1,
• FIG. 4 shows an enlarged illustration of section C from FIG. 1,
• FIG. 5 shows an enlarged illustration of section D from FIG. 1,
• FIG. 6 shows an enlarged illustration of section E from FIG. 1.
• a banknote 1 was chosen as the object of value for the exemplary embodiment shown, since this is a typical document of value which should be as forgery-proof as possible, the design of the printed image serving as a security element.
• the invention is not limited to the creation of a printed image on banknotes, but that it is made possible by means of a any other security elements can be generated or such valuable objects can be secured against counterfeiting.
• the invention can also be used to produce security elements which are only subsequently connected to the object of value, such as labels or transfer elements.
• the sample banknote 1 shown in FIG. 1 has a complex printed image with many different printed image elements 2, 3, 4, 5.
• One of these printed image elements 2 is a pattern 2 shown in the left third of the banknote 1 made of very fine, straight lines 6.
• Further printed image elements are, for example, a lettering 3 in the middle of the banknote 1 and guilloches 4 running from edge to edge. In the lower left corner there is a rosette-like printed image element 5.
• the banknote also has a large number of other printed image elements. In the following, however, some possibilities for the specific embodiment of the invention are shown by way of example only on the basis of the explicitly mentioned, selected picture elements.
• FIG. 2 shows an enlarged detail A from the line pattern print image element 2 on the left side of the pattern banknote 1 according to FIG. 1.
• the widths of the lines printed with the colors FI and F2 have values of approx. 100 ⁇ m.
• the lines printed continuously with the color FI were replaced by dotted lines, the lines printed with the color F2 symbolized by solid lines.
• the lines printed in the colors FI and F2 can be recognized in the printed image as solid lines that directly adjoin one another.
• FIGS. 3 and 4 each show enlargements of the letters “De” and “i” in the lettering “Devrient” of the banknote 1 according to FIG. 1.
• the lettering printing picture elements 3 were produced by intaglio printing. Certain areas within the engraving printing are FI with a thermochromic color 3, which shows a case in which a filling area within the letter "D” of the lettering - delimited by a sharp line in the color F2 - in a thermochromic color FI is printed, which disappears when heated, so that in this area an apparently “unprinted” free space is created within the printed image element 3.
• a further case is shown in which the letter “e” appears uniformly red, but in the upper half of the letter in when heated appeared blue. This is achieved by printing the letter in the lower area with the red color FI and in the upper half with the thermochromic color F2.
• the letter can be framed with a border in the color F3.
• FIG. 4 shows, as a further example, an area delimited by a line in red color F2 within the i-point of the lettering, which is filled with a red thermochromic color FI, which changes to a light green color when heated.
• FIG. 5 shows a further exemplary embodiment for a print image element 4, which was generated in offset printing.
• This is a Guilloche pattern with intertwined lines, which is designed in a certain area in thermochromic colors that disappear when heated. The heated state is shown here, in which the thermochromic colors are not visible.
• the partial pattern printed in the thermochromic colors FI and the remaining partial pattern printed in the non-thermochromic colors F2 fit together again in register.
• FIG. 6 shows an exemplary embodiment of a printed image element 5, in which, in engraving printing using a thermochromic color FI, the areas between intertwined guilloche lines 7 were partially designed such that they appear red when heated and again match the areas printed with color F2 when cooled appear.
• the guilloche lines in intaglio printing can have line widths of less than 50 ⁇ m, preferably 25 ⁇ m.
• thermochromic color and a non-thermochromic color can be used as a color gradient, e.g. of a guilloche pattern.
• thermochromic color for printing the pupils within a portrait shown in the printed image, so that a color change, e.g. from blue to green. It is also striking to print certain essential components of a motif, for example an object depicted in fine lines, which a person depicted in the printed image is holding in his hand, in a thermochromic color that disappears when heated.

Landscapes

• Business, Economics & Management (AREA)
• Accounting & Taxation (AREA)
• Finance (AREA)
• Printing Methods (AREA)
• Credit Cards Or The Like (AREA)
• Heat Sensitive Colour Forming Recording (AREA)

Applications Claiming Priority (3)

Publications (2)

Family

ID=27675035

Family Applications (1)

Country Status (5)

Families Citing this family (1)

Family Cites Families (6)

• 2002
  • 2002-02-27 DE DE10208393A patent/DE10208393A1/de active Granted
• 2003
  • 2003-02-25 EP EP03742956A patent/EP1480838B1/fr not_active Expired - Lifetime
  • 2003-02-25 DE DE50310672T patent/DE50310672D1/de not_active Expired - Lifetime
  • 2003-02-25 AU AU2003210350A patent/AU2003210350A1/en not_active Abandoned
  • 2003-02-25 WO PCT/EP2003/001919 patent/WO2003072371A1/fr not_active Application Discontinuation
  • 2003-02-25 AT AT03742956T patent/ATE411909T1/de active

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events