Colour individualisation of security documents

FIELD: printing.

SUBSTANCE: invention relates to a method and also the device for colour individualisation of security documents, as well as to security documents for colour individualisation with the body of the document. The starting materials are located inside this document body, which by localised targeted energy input are excited to create or modify the nanoparticles of different type and/or local concentration while the colour perception of the nanoparticles depends on their type and/or local concentration. For individualisation of such security document with such document body, the energy is injected locally purposefully into the place where in the document body the colour perception should be achieved in order to keep the individualising information through the achieved colour perception. At that, to achieve the colour change the dependence of absorption of light by nanoparticles on the wavelength is modified, which is not only the change in the absorption efficiency in the absorption spectrum, the colour change is due to the quantisation effect of the nanoparticles, and the colour perception is set by the energy input.

EFFECT: proposed invention provides the ability of colour individualisation of the document.

21 cl, 5 dwg

 

The invention relates to a method and apparatus for color customization-protected documents, which have the body of the document, as well as to protected documents for color customization with the body of the document and the method of their manufacture.

Secure documents are documents that use elements of protection protected against forgery, falsification and/or copy. Thus, to protected documents include, for example, identity card, passport, identity cards as cards, identity cards for access control, tax stamps, tickets, driver's license, the car documents, banknotes, cheques, postage marks, credit cards, any chip-card and self-adhesive labels (for example for protection of the product). Such protected documents, which are sometimes also referred to as valuable documents typically have a substrate, a printed layer, and, optionally, a transparent cover layer. The substrate is a supporting structure to which is applied a printed layer with information, images, designs, etc. as materials for the substrate are acceptable all the usual for this type of application materials in paper and/or plastic-based.

Many modern protected documents have the body of the document, which contains at least one, preferably several is about, most preferably exclusively consisting of several plastics, interconnected layers. This is the body of the document has one or more security elements. One type of protection elements represents embedded in this card individualizing data, which may include, for example, the serial number, the ID number relating to the identity data, such as name and/or date of birth, biometric data, such as photos (passport pictures), growth and/or eye color and the like.

The prior art known to the introduction of such individualizing data inside consisting of plastics material of the body of the document. For this laser in plastic material is injected energy, and this is pyrolysis, which leads to carbonization and, thereby, to the blackening in the places where the plastic is injected energy. This method is described, for example, in EP 0975148 A1. Accommodation individualizing information within the body of the document has the advantage that it is particularly well protected against wear and tampering.

In addition, the prior art known to the introduction of the card body color of individualization. From DE 10053264 A1 is known, for example, a method of writing data, primarily personalizes data on and/or in the data carrier by the electric is magnitnogo radiation, thus the way is prepared for any media data, and/or in which at least locally provided at least one dye, and the dye by means of electromagnetic radiation is irradiated at least one wavelength range, so that the irradiated region in the discoloration is changing the paint color, this color is definable by a machine and/or the human eye.

In DE 19955383 A1 describes a method of applying color information on the object while the object is at least located near the surface layer has at least two transmitting different paint particles, which under the influence of laser radiation change the color of this layer is applied laser radiation of at least two different wavelengths to change the color of this layer, and the target exposure laser radiation is a vector and/or raster way through the two-dimensional deflection device beams, and a focusing device for focusing the laser radiation on the layer object. In this way due to different wave lengths in the different ranges of wavelength absorbing pigments fade to change the color perception.

From DE 10316034 A1 is known a method of forming information in the body of the carrier, which is hardly simple media tools should be created especially long-term, stable to light and humidity information. For this, a certain number are contained in the body of the carrier source materials in a localized partial region of the body of the carrier by means of laser radiation are the reaction conditions that encourage these source materials for the synthesis reaction. When this is selected complex reaction processes for the synthesis of colored substances can only be started deliberately by a laser, not sunlight. When this colored substance is a substance which is a color regardless of its size and shape. Thus can be synthesized various colored substances. However, problematic is the purposeful guidance on individual colors. Another problem lies in the conduct of the color-forming reactions with spatial resolution and without quenching reactions in order to achieve unambiguous staining.

Thus, in the basis of the invention is the technical problem of creating a method and device, as well as the body of the document is a protected document, and the method of its manufacture, with which is possible in a simple way the color of individualization, preferably after fabrication of the body of the document.

According to the invention this problem is solved by a method with the characteristics of points is 1 and the claims, protected document with signs of paragraph 11 of the claims, as well as devices with signs of paragraph 22 of the claims. Preferred embodiments of the invention arise from the dependent claims.

For this purpose provides for the use of nanoparticles, whose interaction with electromagnetic radiation, i.e. light in the visible wavelength range, depends on the effects of quantum mechanics, which are influenced by the type and/or the local concentration of the nanoparticles. For this purpose, we propose a method of color customization of protected documents, which contain the body of the document, which contains the raw materials by localized targeted energy input excite to create or modify the nanoparticles, with the type and/or concentration of the nanoparticles locally in the body of the document depends on the input energy, and the colour perception of the nanoparticles depends on their type and/or local concentration, in which the energy locally purposefully injected into the place where the body of the document should be reached on color perception in order achieved through color perception save individualizing information. This creates a protected document, which contains made possible with the TEW color personalize the body of the document, within the body of the document contains original material that purposefully for the formation of nanoparticles of different types and/or different concentrations are excitable by the localized energy input, with the type and/or concentration depends on the input energy, and the colour perception of the nanoparticles depends on their type and/or concentration. Device for the individualization of the specified protected document with the body of the protected document comprises a receiver body of the document to the body of the document, the source of energy for the localized energy input into the body of the document in order to intentionally alter color perception so that by the received color perception in the body of the document remained individualizing information. Protected document executed with the ability to color personalize the body of the document is created due to the fact that in the manufacture of the body of the document it at the same time introduced the original materials.

When manufactured by a lamination of several layers of the body of the document source materials can be embedded between two layers before laminating, for example, using printing techniques.

Under the guise of nanoparticles is meant, first, their size, and, secondly, their geometric shape. Nanoparticles from poluprovodn ekovich materials, which in the solid-state material (Bulk) have forbidden zone, preferably less than 2 electron volts, are often so-called effect of quantization size, when the size of the particles varies continuously decreasing nanoparticles in the range of a few nanometers or less. The less becomes the nanoparticles of the semiconductor, the more restricted area. Thus, the energy bandgap depends on the size, i.e. the form of nanoparticles. With the energy of the forbidden zone, in turn, associated absorption characteristics of electromagnetic radiation. With the change of the band gap energy changes the color of the nanoparticles, that is, color perception, which is obtained when considering nanoparticles. In certain types of nanoparticles on color perception, i.e. the absorption behavior is influenced mainly by the shape of their surface. In the excited particles of the so-called surface plasmons. They crucially depend on the particle shape. Without changing the volume, only by changing the shape of the nanoparticles, for example, when shaped sticks the nanoparticles, i.e. the ratio of longitudinal length to transverse extent of its absorption behavior may change depending on the wavelength. Thus, in the first place, under the color FOTS what etiam mean absorption behavior of the nanoparticles. In addition, for the specialist this implies that color perception, of course, also depends on the number available in a certain volume or a certain surface of the nanoparticles, as the number of particles affects the total absorption in the specified volume or on a given surface. However, this is not a characteristic absorption spectrum, and only the absorption efficiency. If, in connection with the invention it is about the change in color perception, it is not a mind in connection with the enlarged/reduced absolute absorption.

This should be distinguished changing color perception nanoparticles based on their local concentration. When the nanoparticles have an absorption behavior in the visible region of the spectrum is determined mainly by the excitation of surface plasmons, has one dependent on the concentration effect, which changes the dependence of absorption on wavelength and, thus, the color of the nanoparticles. While a certain role is played by the effects of quantum mechanics, which is based on the fact that nanoparticles affect each other and forming a chemical bond, alter the quantum-mechanical state functions of the electronic system of individual nanoparticles that change their absorption spectra, and as a result of this and their color. Therefore clicks the zoom, when these nanoparticles concentration leads to a more intense color perception, and it is shifted to another color color perception. This effect is called here the effect of quantization of nanoparticles.

Thus, through targeted local energy input into the body of the document purposeful formation of nanoparticles, i.e. the creation or modification of the nanoparticles, and due to this purposeful establishment of almost any color optical region of the spectrum. Thus, through this is possible colour individualization protected documents.

It is important to note that most of the proposed systems do not require input energy, as a rule, and as the activating energy to start or to carry out the formation of nanoparticles, which lead to changes in color perception. Moreover, the raw materials introduced into the body of the document so that at normal ambient temperatures it interferes systems to form such produce color perception nanoparticles. The smallest nanoparticles, which are stabilised by the introduction of the matrix, the chemical solution or the like, for example, tend to grow together in larger nanoparticles. As a result, the surface energy of the participating nanoparticles generally designed for people who is. This process is suppressed by introducing into the body of the document when the ambient temperature and occurs only where the body of the document in the input energy is locally heated.

In one preferred embodiment, the energy is introduced through one or more lasers. Lasers provide the advantage that their light is well focused, and therefore, the energy can be summed up in focus purposefully localized. With proper selection of the wavelength of the laser radiation, depending on the material of the body of the document, it is possible to implement the color of individualization and not only on the surface. In addition, the energy input by one or more lasers provides the advantage that it is possible to modulate the intensity and/or frequency of the laser in order to control the input of energy, and due to this and the process of formation of causing the desired color perception nanoparticles.

In one preferred embodiment, the raw materials contain nanoparticles, the energy bandgap which in connection with the effect of the quantization size is greater than the energy of visible light photons. These nanoparticles raw materials in targeted energy input into the body of the document can be induced is to in order to grow into larger nanoparticles and therefore the effect of quantization size to change its absorption spectrum and, thereby, its color and color perception.

Thus, in one embodiment, the source materials are preferably embedded in the matrix. It is preferably made so that the components of the source materials can move in the matrix, if the matrix is injected energy, and it is due to this heated.

In one particularly preferred embodiment provides that the matrix is composed of polycarbonate, primarily from bisphenol-A-polycarbonate. Polycarbonates suitable mainly because in the visible wavelength range, they are transparent to electromagnetic radiation. However, with a laser can be generated such high energy density radiation that the polycarbonate material can be locally targeted hot.

However, in order to improve the absorption of laser radiation in one embodiment, the invention provides that the source material contains material activator, which absorbs laser radiation. Material-activator can be injected in concentrations that do not negatively impact on the perception of transparency of the body of the document, and yet markedly increase l is unique targeted absorption of laser radiation. The wavelength of the laser radiation can be coordinated so as to achieve good absorption in the material of the activator.

In one preferred refinement of the invention provides that the material activator contains zinc oxide ZnO. However, as the material of the activator can be applied to other substances, such as soot or Iriodin®.

In another embodiment, the invention provides that the source materials additionally or alternatively contain a precursor for the formation of nanoparticles, the absorption behavior of which depends on their type and/or their local concentration. This means that color perception depends on their type and/or their local concentration. At the same time as precursors in the source materials are those substances that result from chemical reactions in the energy input into the body of the document form the nanoparticles and/or lead to the growth of existing smallest nanoparticles. In this embodiment, through targeted control of the input energy can purposefully influence on the number of generated nanoparticles and their size. If a large input of energy occurs within a short period of time, so that locally the material is heated to a high temperature, for example 80°C, initiated the formation of a large number of crystallization centers. If, on the contrary, energy is chosen so that locally obtained a lower temperature, for example 120°C, there is only a slight formation of crystallization centers, but, nevertheless, the increasing size of existing nanoparticles at this low temperature is progressing.

Thus, through targeted energy supply can be varied in time, local temperature, and due to this can be ensured by the management process, so that it may be optimal desired color perception, i.e. the desired color. Especially suitable substance was II-VI semiconductor nanoparticles. However, the known or other suitable systems or substances such as cadmium phosphide Cd3P2and so, In principle, can be applied to all substances, which are dependent on the type of the absorption behavior in the visible range of wavelengths, primarily dependent on size, shape and/or concentration of the absorption behavior (here again refers to the change in the absorption spectrum (dependent on wavelength) depending on concentration).

Defined as a particularly suitable II-VI semiconductor nanoparticles, as a rule, a large effect of quantization size is. For the preferred materials include, for example, sulfide, cadmium or mercury sulphide, selenide of cadmium or mercury selenide, cadmium telluride or mercury telluride, as well as ternary or Quaternary compounds of these elements. In order to carry out the formation of these nanoparticles or to support or stimulate the growth of the size of the existing nanoparticles, the source materials may include, for example, acetate, cadmium and/or acetate of mercury and thioacetamide, of which when the input energy is formed sulfide cadmium or mercury sulphide.

In yet another embodiment, the raw materials contain able to quantization form nanoparticles, which depending on the energy input change their shape, their color perception depends on the form. Able to quantization of the shape of the nanoparticles can be, for example, from gold and/or silver and/or alloys thereof. Source materials may include, for example, having the form of sticks nanoparticles of gold. By the input of energy, these nanoparticles can be stimulated to turn in the direction of the spherical shape. This changes the absorption spectrum, which is under the dominant influence of the excitation of surface plasmons.

Dependent on the concentration of color perception are primarily nanoparticles of alloys of gold and silver. Their absor the operating behavior depends on the average distance to neighboring nanoparticles. In one preferred variant of the invention, the starting materials contain the precursor substances, which form colloidal nanoparticles, color perception depends on the local concentration of the colloidal nanoparticles. For example, the source materials may include zinc oxide (ZnO), and salts of gold or silver. When laser irradiation of ZnO acts as a provider of electrons for the recovery of gold or silver. Due to this, may be initiated by the growth of nanocolloidal of gold and/or silver.

Energy input is carried out so that the chemical degeneration, primarily depolymerization, pyrolysis or carbonization, the material of the body of the document occurs.

In one preferred embodiment, there are optical sensors that control color perception. In this case, the energy supply is regulated depending on the controlled color perception.

Particularly preferably, the energy is introduced into the body of the document localized purposefully in several places to based on the type and/or concentration of the nanoparticles to achieve in several places of color perception, while these few places form a pattern, which contains individualizing information. Preferably, in different places through the input energy having different color is s perception. This means that the input energy in different places is different.

Below the invention is explained in more detail with reference to the preferred example of its implementation. When this is shown:

1 schematically, the potentials for particles of different sizes, respectively, for the valence and conduction bands;

Figure 2: absorption curves for particles of different sizes;

Figure 3: characterization of prohibited zones depending on the size of the particles to be able to quantization of particle size;

Figure 4: nanoparticles of different shapes; and

Figure 5: device for the individualization of a protected document from the body of the document, executed with the ability to color personalization.

In figure 1 for three different particle sizes a, b, c presents a rectangular potential well for the conduction 1a, 1b, 1c and the corresponding rectangular potential well for the valence band 2a, 2b, 2C. Width 3a, 3b, 3c separate rectangular potential holes 1a, 2a, 1b, 2b, 1c, 2c in block model in each case depends on the size of the particles. The larger the particle, the greater the corresponding rectangular potential well. In this case, the particle and is the smallest particle, and the particle with the largest particle.

If these rectangular potential wells 1a-1c, 2a-2c, respectively, to determine the resulting considering quantum mechanics energy is Cesky the lowest energy levels 4a-4c in the conduction band or the high energy state 5a-5c valence band, for particles a-c of different sizes turn out to be different to the energy difference 6a-6c, which in each case can be associated with the energy bandgap. With increasing size of the particles the energy difference 6a-6c is reduced. The more restricted area of the particles, the energy above must be radiation, which is absorbed by this particle.

Photons, the energy of which is less than the energy bandgap, not absorbed. This means that with increasing size of the particle is the red shift of the band edge absorption. This is schematically shown in figure 2. There inflicted absorption for particles of various sizes depending on the wavelength. The edges of the absorption band 11a-11c absorption curves 12a-12c show a shift towards higher wavelengths, i.e. red shift with increasing particle size, the increase of which is indicated by arrow 13. When changing the particle size appears appropriate behavior.

For cadmium phosphide Cd3P2forbidden zone in a solid is 0.55 eV. When the average particle diameter of 3 nm, the material does not look black, and brown. With further decrease of the diameter of the color is changed to red, orange and yellow as long as the material at about 1.5 nm will not look white and have a prohibited area of about 4 eV.

Figure 3 shows schematically changed the e in the conduction band 15 and the valence band 16 in each case depending on the size of the particles. At small particle sizes energy 17 bandgap is large, for example, of the order of 4 eV. Particles of this size are white. When increasing the size of the particles energy 17 bandgap decreases, and the color changes from yellow through orange and red to brown and finally black.

Similar energy effect occurs, for example, having the form of sticks the gold particles. Figure 4 schematically shows the nanoparticles 21, whose format, length 22 width 23 decreases. Such shaped sticks of nanoparticles, nanoparticle size, embedded as source material, for example, made of polycarbonate matrix. If this matrix to heat, the nanoparticles are given the opportunity to change its shape. The decrease in the format leads to a decrease of the surface, and thus energy surface so that this transformation initially shaped sticks nanoparticles 21 is prevented only by the matrix. Only when the heating matrix and nanoparticles last given the opportunity to change its shape to a spherical shape. The volume of the nanoparticles remains unchanged. Change format change and its absorption behavior with infrared to the visible.

Figure 5 schematically shows a device 41 for laser personalization protected document 42, to the which contains all executed with the ability to color the individualization of the body 43 of the document. Preferably, the body 43 of the document is formed by the lamination of several layers 44 of the composite body. Preferably, these layers 44 are formed from one or more thermoplastic synthetic materials. Before lamination, the individual layers or all the layers may be printed. In addition, in single or multiple layers can be embedded microchips or other protective elements. At least one layer, preferably several layers are made so that they are sealed source materials for the formation of a scalable nanoparticles. Nanoparticles can also be embedded between two layers, for example, using printing techniques. The layer is, for example, from bisphenol-A-polycarbonate. This material is the matrix for the source materials. In this matrix is implemented, for example, the smallest nanoparticles substances, energy bandgap which is greater than the energy of visible light photons. Additionally or alternatively, the matrix can be embedded predecessors, for example, acetate cadmium or thioacetamide. As a material of the activator in a matrix are sealed, for example, zinc oxide ZnO.

The body of the document contained in the receiver 55 of the body of the document.

As an energy source device 41 includes a laser 45. This laser 45 generates the electromagnetic radiation and prekrasnoi, visible and/or ultraviolet region of the spectrum. For example, the laser 45 may be selected from the following list “YAG:Nd lasers (the length of the fundamental wave or frequency-multiplied: 1064 nm, 532 nm, 355 nm, 266 nm), excimer lasers (F2157 nm, Xe 172 nm), exciplex laser (ArF, 193 nm, KrF 248 nm), XeBr 282 nm, XeCl 308 nm, 351 nm XeF), titanium-sapphire laser, CO2lasers (10.6 μm) or diode laser”. This laser radiation 46 using projection optics 47 localizes with focus in the area of the layers 44, in which the sealed source materials. In focus 48 laser radiation 46 is absorbed, preferably, the material of the trigger, for example, zinc oxide (ZnO). This leads to a local hot spot (hot spot), which is the formation of cadmium sulfide, which is deposited on the material-activator - zinc oxide (ZnO). Depending on the intensity of the laser radiation, produces different amounts of nanoparticles. The higher the intensity of the laser radiation, that is, the higher locally raises the temperature of the matrix, the greater is formed nanoparticles. If you select a lower temperature, producing less nanoparticles or they are not formed at all. However, the growth of existing nanoparticles continues. This changes the size of the nanoparticles 49. Depending on the size changes color perception.

Another option is the implementation of the material irradiation-activator, for example, zinc oxide (ZnO), lead to the creation of pairs of electron-hole", resulting in, for example, ions of salts of metals, primarily silver (Ag+) and gold (Au3+), is restored to the corresponding metals and form nanoparticles.

By the optical sensor 50, which is made, for example, in the form of a color CCD camera is controlled optical perception. This may require that the body 43 of the document illuminated by the source 51 of the light. Registered by the optical sensor 50 signals are analyzed in the control unit 52 that controls the energy input through made in the form of laser 45 energy source 41. In addition, the energy source 41 may include a modulator 54, which is modulated in frequency and/or amplitude of the laser in order to provide the ability to control the energy input into the body 43 of the document. In other embodiments, implementation of the modulator can be integrated in the laser 45.

Expert it is clear that the energy source can contain multiple lasers, which emit light of different wavelengths. Due to this, it is possible optimum excitation of different materials-activators.

In other embodiments, the implementation can be provided that the nanoparticles to change the color perception are created in several different SL is the beautiful body of the document. If the laser radiation is focused in different parts of the body of the document simultaneously or offset in time, so that in each case locally to purposefully introduce energy and create nanoparticles that create optical perception of color in the visible spectrum, in the body of the document can be created color pattern, which is a individualizing information, such as name, passport photograph, etc.

In some embodiments, the implementation of the body of the document is fully protected document or valuable document. In other embodiments, implementation of the document is sealed, for example, in the book of the passport.

In some embodiments, the implementation of the document body is laminated from several layers of a composite body in which the different layers contain different source materials and/or their concentration. Due to this, through localized energy input into different layers in a simple way can be created in various color perception. Together they can form a color pattern. However, the layers may contain the same original materials and/or their concentration.

Expert it is clear that the invention mainly find application in the visible region of the spectrum. However, embodiments of which create color perception, which is nedosmotrela only for machine checks. On the one hand, since color perception is in the UV or IR region of the spectrum, or because a certain concentration of the nanoparticles, the intensity of the absorption machine check is not high enough. In this case, refers to the ratio of the absorption intensity, and not dependent on the wavelength of the nature of the change. And here information is stored by changing the changed depending on the wavelength of color perception. Only a certain amount created, changed in color nanoparticles purposefully supported small.

Describes the options for implementation are only approximate. Expert it is clear that there are many opportunities modification.

1. The method of color customization of protected documents (42), which contain the body (43) of the document that contains the raw materials by localized targeted energy input excite to create or modify nanoparticles (21; 49)the type and/or concentration of the nanoparticles (21; 49) locally in the body (43) of the document depends on the input energy, and color perception nanoparticles (21; 49) depends on their type and/or local concentration, characterized by the fact that energy locally purposefully put in place where in the body (43) the document must be DOS is ignoto color perception, through the achieved color perception save individualizing information, and to achieve the color change alter the absorbance of nanoparticles as a function of wavelength, which is not only changing the efficiency of absorption in the absorption spectrum, the color change is due to the effect of quantization of the nanoparticles, and color perception set by the input of energy.

2. The method according to claim 1, characterized in that the energy injected by laser means (45).

3. The method according to claim 1, characterized in that the energy injected warioware in time.

4. The method according to claim 2, characterized in that the laser intensity and/or frequency of the laser radiation modulate to control the input of energy in time.

5. The method according to claim 2, characterized in that the wavelength of the laser radiation will agree in order to achieve good absorption in the material of the activator, which is contained in the original materials.

6. The method according to claim 1, characterized in that the input energy is carried out so that there is no chemical degeneration, primarily depolymerization, pyrolysis or carbonization of the material body (43) of the document.

7. The method according to claim 1, characterized in that the color perception of control, and the power supply is regulated depending on the controlled color perception.

8 the Method according to claim 1, characterized in that the energy is very local purposefully injected into the body of the document in several places in order to create in these several places of color perception-based nanoparticles, with these few places form a pattern, which contains individualizing information.

9. The method according to claim 8, characterized in that in several places by the input of energy to create different color perception.

10. The method according to one of claims 1 to 9, characterized in that by changing the input energy is purposefully different form nanoparticles.

11. Protected document (42), which contains the completed personalizable body (43) of the document, inside the body (43) of the document contains the raw materials through localized energy input are excitable for the formation of nanoparticles (21; 49) of different types and/or different concentrations, with the type and/or concentration depends on the input energy and color perception nanoparticles (21; 49) depends on their type and/or concentration, and color perception achieved by modifying the dependence of the absorption of light by nanoparticles as a function of wavelength, which is not only change the efficiency of absorption in the absorption spectrum, color perception due to the effect of quantization of the nanoparticles and is installed is the exploits of energy input.

12. Protected document (42) according to claim 11, characterized in that the starting materials contain nanoparticles, the energy bandgap which in connection with the effect of the quantization size is greater than the energy of visible light photons.

13. Protected document (42) according to claim 11, characterized in that contained in the original materials, the nanoparticles tend to increase the particle, leading to the effect of quantization size.

14. Protected document (42) according to claim 11, characterized in that the starting materials contain a precursor for the formation of nanoparticles (21; 42), which have the effect of quantization size, or the effect of quantization form, or the effect of quantization of nanoparticles.

15. Protected document (42) according to claim 11, characterized in that the source material embedded in the matrix.

16. Protected document (42) of clause 15, wherein the matrix is composed of polycarbonate, first of all bisphenol-A-polycarbonate.

17. Protected document (42) according to claim 11, characterized in that the starting materials contain material activator, which has good absorption of laser radiation.

18. Protected document (42) 17, characterized in that the material activator contains zinc oxide (ZnO).

19. Protected document (42) according to claim 11, characterized in that the starting materials contain able to quantization form nanoparticles (21; 49), which alter St the th form depending on the energy input into the document body (43), their color perception depends on the shape.

20. Protected document (42) according to claim 11, characterized in that the starting materials contain the precursor substances, which form nanocolloid, color perception depends on the local concentration of nanocolloidal.

21. Protected document (42) according to claim 11, characterized in that the body (43) of the document is laminated from several layers (44) composite body and different from these multiple layers (44) of the body (43) of the document contains a variety of source materials.



 

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21 cl, 15 dwg

FIELD: printing.

SUBSTANCE: method of manufacturing a polymeric multilayer composite comprising several layers of polymer, at least one of which contains the laser-sensitive component, comprising the stages: A) at least on one of the polymeric layers by ink-jet method the first personalised information sign is applied as a coloured printed layer obtained by ink-jet method; B) the polymeric layer with the coloured printed layer obtained by ink-jet method, which is a polycarbonate layer, is then combined with other polymeric layers, at that the polymeric layer with the coloured printed layer obtained by ink-jet method is located between two other polymeric layers; C) in the polymeric multilayer composite obtained at the stage B) by means of laser engraving, the second personalised information sign is inserted. At that the printed layer obtained by ink-jet method comprises a binder which is the polycarbonate derivative which contains functional structural carbonate units of formula , where R1 and R2 independently of each other represent hydrogen, halogen, C1-C8-alkyl, C5-C6-cycloalkyl, C6-C10-aryl and C7-C12-aralkyl; m is an integer from 4 to 7; R3 and R4 are individually selected for each X and independently of each other from hydrogen or C1-C6-alkyl; X is carbon, and n is an integer greater than 20, providing that in at least one atom X, R3 and R4 simultaneously mean alkyl.

EFFECT: proposed invention provides protection against manipulation of colour personalised information signs

23 cl, 4 dwg

FIELD: chemistry.

SUBSTANCE: invention relates to magnetic compositions used as ink or toner for producing pigmented magnetic materials. The magnetic composition contains particles having a core made of magnetic material and a coating surrounding the core. The pigmented magnetic layer on the substrate has a Hunter Lab colour scale L-value of at least 50. The coating of each particle is sufficiently opaque so as to completely conceal the colour of said core or an additional coating under said coating. Described also is a method of forming a pigmented magnetic layer, the obtained articles, e.g. banknotes, the protective property of the magnetic layer for the banknote.

EFFECT: disclosed magnetic compositions contain particles which are coated such that they look white, substantially white or coloured, while providing the desired magnetic properties and opening up new possibilities of producing corresponding magnetic layers on substrates.

24 cl, 2 ex

FIELD: textiles, paper.

SUBSTANCE: method of manufacturing a sheet material comprising at least two superimposed fibrous layers, including the following steps: the first paper layer is produced, having at least one elongated zone of zero thickness, by means of filtering of the aqueous suspension of fibers on the grid of the first drum or farmer. And in the process of formation of the said layer, a transparent element is at least partially inserted into it. And the said at least partially transparent element is located at least in the said elongated zone of zero thickness, the second paper layer is produced on the grid of the second drum to form at least one recess in the said second layer, both layers are combined so that at least one recess of the second layer is placed in front of the said at least one elongated zone of zero thickness of the first layer comprising at least partially transparent element, with the formation of the window at this time, and the structure thus obtained is dried.

EFFECT: improvement of the method.

43 cl, 7 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to production of sheet material composed of, at least, two superimposed fibrous layers. Proposed method comprises the following steps. First paper layer is made with, at least, one elongated zero-thickness zone by filtering water suspension at first drum screen. Second paper layer is made at second drum screen to make, at least, one recess in second layer. At least, one transparent element is arranged between two still wet layers to bind both layers so that said recess of second layer, one said transparent element and said elongated zero-thickness zone of first layer are opposed. Made structure is dried.

EFFECT: sheet material with protective element without structure peeling.

43 cl, 6 dwg

FIELD: printing.

SUBSTANCE: invention relates to a valuable document that is protected against forgery. The valuable document comprises coating in the form of a printing raster, made with at least one colour that is different from the colour of the basis of the document. Also, the document comprises a three-dimensional raster located in relation to the coating so that the three-dimensional screen is at least partially located on the coating, is mainly oriented parallel to the lines of the printing raster, and with the coating it forms a latent image which is indistinguishable when observing the document at right angle to the surface. At least some of the three-dimensional raster strokes are made with asymmetrical cross section profile with the ratio of the profile walls of not less than 1:1.25; thereby when changing the angle of observation the latent image is appeared which is made in the form of coloured elements or monochromatic coloured field. When changing the direction of viewing the document by 180° at the same angle of observation an effect of the change in optical density or colour-grade of at least a part of the latent image appears.

EFFECT: invention enables to improve protection against forgery of valuable document with an optically variable image, which makes it possible to carry out a visual control of authenticity by the unskilled user, both with and without the use of simple and accessible technical devices to determine the authenticity of the document.

29 cl, 11 dwg, 4 ex

FIELD: printing.

SUBSTANCE: invention relates to counterfeit-proof printing products and is related to polymer multilayer protective element having an optically variable effect. It is designed as a structure in which at least one layer contains micro-raster relief structure, and the second layer comprises a printing raster of micro-images located at the nodes of a printing raster. The spatial period of the printing raster is defined by spatial period of the micro-raster relief structure. Elements of the micro-raster relief structure are made in the form of mirror focusing elements, which are micro-mirrors, embossed micro-knobs on the lacquer layer and phase Fresnel zone plates that bear the reflective or semitransparent reflective thin layer of metal located inside the element in nodes of relief raster. Location and orientation of a raster of mirror focusing elements are chosen so as to conform to the location and orientation of the raster of micro-images formed on the upper surface of the polymer film, so that when looking at the protective element the enlarged floating images of elements of printing raster and enlarged floating images of shadows of elements of printing raster are observed.

EFFECT: invention provides an improvement of protection of valuable documents.

4 cl, 9 dwg, 3 ex

FIELD: information medium sealed up by the method of metallographic printing, method for its manufacture, as well as a printing plate suitable for the purpose and the method for its manufacture.

SUBSTANCE: the information medium, first of all a bank note, securities or a similar document, which has at least one sealed up section (13) and at least one separate section (14) practically completely encircled by this section. The mentioned section (13) and the separate section (14) are sealed up by the metallographic method, and both sections are sealed up by paint coats of a different thickness and differ from one another.

EFFECT: provided a high degree of protection against forgery of the information medium.

21 cl, 11 dwg

FIELD: important documents with protective attributes, combination of matters with two automatically controlled properties for protecting important documents against counterfeit, methods for making such documents and methods for testing authenticity of charred matters and ash.

SUBSTANCE: important document, mainly bank note or person certificate is characterized by use at least of two luminophors whose luminescent properties may be automatically and individually monitored. First luminophore irreversibly losses its luminescent properties at first temperature. Second luminophore irreversibly losses its luminescent properties at second temperature. First and (or) second temperature exceeds natural temperature of burning important document. It allows to identify document according to itself and also according to its ash and prevents possibility of illegal regeneration of materials designed for protecting against counterfeit in order to make duplicates of documents.

EFFECT: enhanced reliability of identifying important documents.

29 cl

FIELD: manufacture of securities.

SUBSTANCE: metallographic printing form has printing members disposed on working surface and made in the form of deepened strokes having cross section profile of asymmetric shape with various angles of inclination of side faces.

EFFECT: increased extent of protection of securities from counterfeit.

17 cl, 4 dwg

FIELD: manufacture of securities.

SUBSTANCE: method involves providing pattern comprising combination of ink layer protrusions and slots therebetween, with width of ink layer protrusions making at least 0.5 mm.

EFFECT: increased extent of protection of securities from counterfeit.

17 cl, 4 dwg

FIELD: manufacture of securities.

SUBSTANCE: method involves providing protrusions of equal width at their base portion and of various cross section at apexes within the range of length of each protrusion.

EFFECT: increased extent of protection of securities from counterfeit.

17 cl, 4 dwg

FIELD: data carriers.

SUBSTANCE: data carrier 14 with forgery-protecting imprint 1 made by metallographic printing method consists of several contrasting structural elements 2,3,4,5,7,22, positioned with precise alignment to each other, while one portion of these structural elements 3,4,5,7 is made relief-type and can be sensed by touch, and other portion of structural element 2, 22 is made flat and undetectable by touch.

EFFECT: exceptionally high level of protection.

4 cl, 9 dwg

FIELD: printing.

SUBSTANCE: method includes use of freely mounted relatively to shape cylinder rolling cylinder, for rolling portions of composite printing form of shape cylinder, rolling cylinders being made with possible forming of portions of stripes of multicolored paints on shape cylinder.

EFFECT: higher efficiency.

3 cl, 9 dwg

FIELD: image printing technologies.

SUBSTANCE: required color is produced by mixing colors of image points, and on substrate fluorescent point of printing paints image are formed, which contain pigments fluorescent when excited by a certain electromagnetic emission, and also non-fluorescent image points of printing paints, containing colored pigments, non-fluorescent when excited by a certain electromagnetic emission. Aforementioned fluorescent image points and non-fluorescent image points are positioned on substrate in staggered order relatively to each other.

EFFECT: higher efficiency, higher quality.

2 cl, 4 ex

FIELD: data carriers.

SUBSTANCE: data carrier is provided with protective element, which allows at least visual control and has at least on a portion an engraving, which is a semi-tone blind engraving, produced by metallographic printing without ink feed, and also disclosed are method for making a data carrier and printing form for making protective element by means of blind engraving.

EFFECT: higher level of protection from forgery.

3 cl, 13 dwg

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