Counterfeit-proof valuable document and method for determining its authenticity

FIELD: printing industry.

SUBSTANCE: invention relates to the field of protection of valuable documents against forgery and is designed for the instrument determining the authenticity of the protected printing products, such as all kinds of valuable documents. The valuable document has a marking comprising at least one inorganic compound with a crystal structure, doped with ions of rare earth elements, having the property of selective interaction with the radiation in the optical spectral range, characterised in that when exposed to radiation on it in a predetermined band of the optical spectrum the radiation of the compound only in this band of the spectrum has an excess over the temperature radiation with the final duration of 10-10 seconds and more.

EFFECT: improving the level of protection of the valuable document.

10 cl, 2 ex

 

The invention relates to the field of protection of valuable documents against forgery and is intended to be an instrument for determining the authenticity of the protected printing products, such as banknotes and forms of the securities and excise and stamps.

One of the most effective and technically feasible solutions for the control of authenticity of banknotes with hidden security features is to evaluate the properties of the re-emission of compounds included in the composition of the protective marking or the basis of banknotes and security documents. The advantages of this approach are the high performance, high level of security due to the possibility of creating a hidden protective elements, the non-contact control method.

Due to these advantages, hidden security features based on nonlinear optical properties of various inorganic compounds have found wide application in high-speed sorting of banknotes, combined with control of their authenticity.

The main requirement for this class of hidden machine-readable indication, intended only for control banknoten technique, is the reliability of the Desk and trudnodokazuemosti population using conventional methods, in particular the spectral and luminescent methods of analysis.

<> Known securities (WO 81/03507 A1 1981) with mark - a sign of authenticity on the basis of the crystal structure with ions of rare-earth metals. The absorption of radiation and photoexcitation occurs in the visible and near IR region and a transparent region in the near IR region, where the connection only emits. In the same source of information is described a method of controlling authentication securities, characterized in that exciting and outgoing radiation are divided into several channels with a specific width of the bands, stimulated emission is measured and the resulting matrix of measured values is used as a criterion of authenticity. In the analysis of authentication features from the entire set of response parameters to consider only the intensity of the spectral bands.

The disadvantage of this solution is the lack of resistance to simulators, since only the range of stimulated emission of inorganic substances on the basis of rare earth elements is not uniquely characteristic of the data spectra are well studied and determined by the nature of the location of the energy levels in the atoms of rare-earth metals-activators. Therefore, a simulator with the same activator, even with differences in chemical composition, can have similar or completely similar to SP the CTE-induced radiation in a given spectral band.

Source WO 81/03510 A1, 1981 describes a security paper with authenticity in the form of fluorescent substances, they are showing the luminescence spectrum only in the invisible regions of the spectrum, the excitation is also invisible light, and the way subtle control authentication securities, characterized in that the security paper is exposed to excitation light in the invisible region of the spectrum, and that the emitted fluorescent light in the invisible region of the spectrum is analyzed detector device according to the wavelength, or the relaxation time.

This solution is based on the use of fluorescent compounds that emit light by Stokes ' law, and is known from other fields of technology, therefore, does not solve the problem of increasing the security level of a valuable document from forgery.

Source WO 2007/003531 A1, 11.01.2007 describes a valuable document with the protective trait-based phosphor for use in fraud-resistant documents, including the crystal lattice of the basic substance - oxysulfide rare-earth element is doped, at least two types of ions. The phosphor has anti-Stokes luminescence and luminescence according to Stokes ' law. This phosphor contains two components, which are specified oxysulfide yttrium, activated it is erbium, the holmium, and oxysulfide activated yttrium ytterbium, erbium in different proportions.

The disadvantages of this solution, on the one hand, should include use as a protective characteristic known fluorescent substances. Known from the prior art fluorescent substances are potentially available to the counterfeiter, and, in addition, the combination of their properties well known that facilitates search and selection of simulators. Since the luminescence properties of the protective trait described in the prototype, depend only on the nature of the alloying substance (ion rare earth element, REE), after the initial determination of the type used in protective marking REE, potential counterfeiter is quite easy to find imitators, and, as mentioned above, replicas may differ materially from authentic substances by chemical composition.

On the other hand, the use of fluorescent compounds emitting in the Stokes or anti-Stokes spectral regions relative to the excitation radiation with the development of analytical techniques rather lends itself well to the exploration and analysis.

The closest to the proposed invention is WO 81/03509 A1, 1981, which describes securities with fluorescent p is znakami authentication, the excitation of the luminescence occurs within a narrow range of wavelengths, and near the same area is luminescence. Describes how to determine the authenticity of the securities by photoexcitation radiation and observation of the characteristics of the excitation or luminescence, wherein the spectral excitation is produced near the luminescence radiation, and the method, characterized in that in the spectral region close to the region of excitation, the observed attenuation of the luminescence radiation.

This solution assumes control of the nature of the decay of the luminescence, which is a significant difference from the other considered solutions. However, the task of improving the security of the valuable document in comparison with the proposed method is not solved in full for three main reasons:

1. In this technical solution is applied luminescent substances known from the prior art, which significantly simplifies the decoding of the sign, and then search and selection of simulators.

2. The proposed solution agrees closely spaced, but not matching band emission/excitation. Thus we assume that the spectral resolution of technical solutions is determined by the spectral width of the semiconductor laser used as the East is of cnica radiation (that is, YES, from 5 to 30 nm depending on the spectral range).

3. Not specified no in the emission spectrum of the additional connection of Stokes or anti-Stokes bands, recorded available analytical methods, and which can determine the fact of his presence in a protective marking, and also does not specify the absence in the spectrum of the excitation connection of additional strips lying outside the core area of the Desk, when exposed to that substance you can discover available analytical methods, and to detect the fact of his presence in a protective marking by the presence of induced Stokes and/or anti-Stokes radiation.

The task and the technical result of the proposed invention is to increase the level of protection of the valuable document from tampering through the use of inorganic compounds unknown in the prior art and having properties of providing reliable and unambiguous identification of the valuable document, but which is the hard-to-detect standard analytical methods of spectral and fluorescent analysis.

The task and the technical result is achieved by the fact that valuable documents, such as banknotes, stamps, postage stamp, passport, travel document, driver's license, oseverenie personality, valuable paper, plastic card or similar document that is protected from tampering, containing on its surface and/or in its composition sneaky protective marking containing at least one inorganic fluorescent compound with a crystalline structure doped with ions of rare earth elements, which has the property of selective interaction with radiation in the optical range of the spectrum, characterized by the fact that when exposed to radiation of a specified band of the optical spectrum of the radiation-only connections in the same spectrum band has a surplus of over temperature by radiation with a finite duration 10-10seconds and more.

As such inorganic compounds may be used, for example, compounds corresponding to the following empirical formula:

LnI2-X-Y-ZLnIIxCeYMeZO3-CSC

where LnI- Y and/or La, Gd,

LnII- Eu, or Tb, or Dy, or Sm, or Yb, or Er, or Ho, or Nd, or Pr, or Tm,

Me - Al and/or Ga,

of 0.0001≤x≤0,4

0,00001≤y≤0,01

0≤z≤0,025

0≤c≤1

or other compounds having the property of selective absorption of optical radiation in only one spectral band.

In addition, valuable document can be characterized by the fact that the protective marking is made offset of str is obom printing.

The task and the technical result is achieved also by using a unique method of determining the authenticity of a valuable document with all of the above inherent features. The method includes the detection of hidden protective marking on the valuable document through the measurement and subsequent analysis of the intensity and duration of the excess radiation in a given spectral band.

It should be emphasized that these measurements and their analysis was first conducted to achieve the technical result regarding labeling using the new, not known from the prior art compounds.

As the present invention, unlike the known technical solutions based on the use of inorganic compounds, not previously known from the prior art, therefore, the sum of the parameters of luminescence that characterize this type of luminescent substances are not found in the known technical solutions and cannot be imitated known from the prior art solutions, either individually or in any combination.

Use when identifying protective marking measurements and subsequent analysis of the intensity and duration of the excess radiation in a given spectral band allows you to use unknown in the prior art, reorgani the definition connection selection and research which cause difficulties for the potential of counterfeiters.

Example 1.

Valuable document containing a hidden protective marking made colorless ink offset printing method and including 10% inorganic compounds Y1,689Ce0,001Tmfor 0.3Al0,01O2S.

Was determined characteristics marking compounds, which are the basis of the method of determining the authenticity of the valuable document according to which the detection of hidden protective marking on the valuable document assumes by measurement and subsequent analysis of excess radiation in the spectral band width of 20 nm at a wavelength of 810 nm in the absence of excess radiation in any other bands of the optical spectrum of wavelengths, and in the absence of excessive radiation when exposed to the substance stimulating radiation in the range from 300 to 800 nm and 820 to 2500 nm.

Presents inorganic compound has the following set of parameters.

1. No excess radiation in the whole range of the spectrum, in addition to a specified band of 810 nm with a width of 20 nm.

2. The kinetics of decay of excess radiation is characterized by a time constant of 2.0 μs.

3. The lack of visual symptoms in any form of optical excitation in the visible range 400-700 nm.

Example 2.

Valuable document containing a hidden protective marking, offset printing and including 5% inorganic compounds Y1,834Ce0,001Erof 0.15Al0,015O3.

Was determined characteristics marking compounds, which are the basis of the method of determining the authenticity of the valuable document according to which the detection of hidden protective marking on the valuable document assumes by measurement and subsequent analysis of excess radiation in the spectral band width of 30 nm at a wavelength of 1550 nm in the absence of excess radiation in any other bands of the optical spectrum of wavelengths, and in the absence of excessive radiation when exposed to the substance stimulating radiation in the range from 300 to 1535 nm and 1565 to 2500 nm.

Presents inorganic compound has the following set of parameters:

1. No excess radiation in the whole range of the spectrum, in addition to a specified band of 1550 nm with a width of 30 nm.

2. The kinetics of decay of excess radiation is characterized by a time constant of 1500 μs.

3. The lack of visual symptoms in any form of optical excitation in the visible range 400-700 nm.

Thus, it is obvious that the technical result is achieved by introducing a protective marking valuable what about the document inorganic luminescent compounds with a crystalline structure alloy ions of rare earth elements, and having the property of selective interaction with radiation in the optical range of the spectrum, characterized by the fact that when exposed to radiation of a specified band of the optical spectrum of the radiation-only connections in the same spectrum band has a surplus of over temperature by radiation with a finite duration 10-10seconds and more.

1. A valuable document that is protected from tampering, containing on its surface and/or in its composition sneaky protective marking comprising at least one inorganic compound with a crystalline structure doped with ions of rare earth elements having the property of selective interaction with radiation in the optical range of the spectrum, characterized in that when exposed to radiation of a specified band of the optical spectrum of the radiation of the connection in only one spectral band of the spectrum has a surplus of over temperature by radiation with a finite duration 10-10seconds and more.

2. Valuable document according to claim 1, characterized in that it is a bill, documentary stamps, postage stamp, passport, travel documents, driving license, identity card, a security paper, a plastic card.

3. Valuable document according to any one of claims 1 to 2, characterized in that the AC is este inorganic compounds used as a compound corresponding to the following empirical formula:
LnI2-X-Y-ZLnIIXCeYMeZO3-CSWith
where LnI-Y and/or La, Gd,
LnII-Eu, or Tb, or Dy, or Sm, or Yb, or Er, or Ho, or Nd, or Pr, or Tm,
Me-Al and/or Ga,
of 0.0001≤x≤0,4
0,00001≤y≤0,01
0≤z≤0,025
0≤c≤1

4. Valuable document according to any one of claims 1 to 3, characterized in that the inorganic compound protective marking has the property of selective interaction with radiation in the optical range of the spectrum in the range from 0.1 μm to 10 μm, preferably in the range from 0.4 µm to 2.5 µm.

5. Valuable document according to claim 4, characterized in that the inorganic compound is a particle size in the range from 0.01 microns to 100 microns.

6. Valuable document according to claim 5, characterized in that the width of the spectral band of the interaction of inorganic compounds protective marking with optical radiation is from 1 nm to 50 nm.

7. Valuable document according to any one of pp.5, 6, characterized in that the protective marking is made in the printing method, preferably the offset printing method.

8. Valuable document according to any one of pp.5, 6, characterized in that the protective marking embedded in a mass of paper or plastic, or embedded in the surface layer of paper or plastic, or applied in the composition of the adhesive layer between the inner layer is logolounge document.

9. Valuable document according to claim 8, characterized in that the protective marking is made in the form of geometric shapes, guilloche elements, graphics and symbols, forms the encoding or represents any combination of all the above.

10. The method of determining the authenticity of the valuable document according to any one of paragraphs. 1-9, characterized in that conduct the detection of hidden protective marking on the valuable document by irradiating the protective marking of radiation in a given spectral band and the subsequent measurement and analysis of the intensity and duration of the excess emission in the same spectral band.



 

Same patents:

FIELD: physics.

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FIELD: physics.

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FIELD: printing.

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35 cl, 12 dwg, 3 ex

FIELD: printing.

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15 cl, 4 dwg

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4 cl, 9 dwg, 3 ex

FIELD: printing.

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24 cl, 10 dwg

FIELD: printing.

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SUBSTANCE: data medium has a substrate having a portion with a distinctive feature formed by a family of curves which includes a plurality of arched and/or diverging slit lines. Inside the portion with a distinctive feature there is an identification mark which is configured for visual or computer recognition and is a pattern, symbols or code. Said identification mark is formed by a portion of the substrate which does not have slits and has a family of marking curves, which includes a plurality of marking lines connected to the slit lines outside the identification mark.

EFFECT: high degree of counterfeit protection.

22 cl, 13 dwg

FIELD: physics, computation hardware.

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33 cl, 26 dwg

FIELD: process engineering.

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EFFECT: better protection against counterfeit.

52 cl, 10 dwg

FIELD: physics, optics.

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EFFECT: improved properties of the film.

21 cl, 6 dwg

FIELD: textiles, paper.

SUBSTANCE: laminated article on paper or polymer substrate with optically variable structure comprises a coating in the form of printing raster and a three-dimensional raster. The coating is formed on one side of the substrate, and the three-dimensional raster is applied to the other side of the substrate. The field of printing or the three-dimensional raster is divided into two or more sectors which are displaced relative to each other. Each sector has a different colour so that when changing the view angle the colour of the sectors on the image changes. The three-dimensional raster is made in the form of elements with a symmetrical and/or asymmetrical profile to form a relief on both sides of the substrate and is positioned relative to the printing raster so that the three-dimensional raster is at least partially located above the printing raster. The width of the printing raster lines is from 50 to 200 microns, the width of the three-dimensional raster lines is 100 to 600 microns, the angle between the elements of the printing and the three-dimensional rasters is from 0° to 10°, at that they form a moire image, which when observing the data medium under the right angle is concealed, and when observing the data medium at an acute angle becomes visible.

EFFECT: improving security of articles, increased manufacturability and reducing the cost of the security element due to reduction of runs in the printing machine.

15 cl, 18 dwg, 4 ex

FIELD: physics, optics.

SUBSTANCE: diffraction structure comprises a plurality of channels assembled to generate a first diffraction optical effect. Each channel is formed from a plurality of scattering and/or diffraction channel elements, each aligned to provide a second scattering and/or diffraction optical effect to form a micro- or macro-distinguishable graphic feature. The method of creating a diffraction surface relief structure involves forming a plurality of scattering and/or diffraction channel elements with alignment, which serves to form a plurality of channels that are assembled to generate a first diffraction optical effect. Each of the plurality of channel elements is assembled to provide a second scattering and/or diffraction optical effect to form a micro- or macro-distinguishable graphic feature.

EFFECT: creating a unique, highly secure feature which is difficult to imitate and can be combined with any optically variable features.

50 cl, 18 dwg

FIELD: printing.

SUBSTANCE: invention relates to the field of manufacturing security documents. The protected structure (1) comprises: a fibrous layer (2a, 2b); substrate (3) with a translucent area; a watermark or its imitation (8a, 8b) applied on the fibrous layer (2a, 2b) and overlapped in the plan at least partially with the translucent area of the substrate, so that in this area the watermark or its imitation (8a, 8b) is visible against the light through the protected structure (1) only from the side of the fibrous layer; and the microelectronic device (4, 10) providing a contact or remote communication.

EFFECT: protection against counterfeiting and erasures.

44 cl, 22 dwg

FIELD: textile, paper.

SUBSTANCE: polymer sandwich element for paper, which has optically variable effect, is made in the form of a sandwich polymer structure containing at least one layer with microraster relief structure. It has an additional layer with printed or embossed raster of microimages, which is spatially combined with microraster relief structure. Microraster structure is made in the form of raster of spherical transparent polymer lenses or prisms or raster of Fresnel diffraction polymer structures. Printed microimages located in nodes of the printed raster consist of elements of different colours with diametre of 20-100 mcm, which are located at the distance of 40-400 mcm from each other. Mutual location of colourful elements in nodes of the printed raster is discernible in different places of a representational printed field. Inside the defined areas the mutual location of colourful elements differs from mutual location of elements outside the defined areas.

EFFECT: invention allows increasing protection degree of products with protective elements without any increase in prime cost of their production process.

3 cl, 4 dwg, 1 ex

FIELD: printing.

SUBSTANCE: invention relates to the field of protection of valuable documents against forgery. The valuable document comprises on its surface an invisible protective marking applied on the elongated section along the long side of the document, which is intended for the instrument reading. The protective marking has the property of selective absorption of the radiation in the range optical spectrum from 0.76 mcm to 10 mcm. The marking is wholly or partially located in the area of additional masking marking. The material of the latter has the property of re-radiation when exposed of the exciting radiation of the same spectral composition as the material of the protective marking, but is characterised with magnitude of afterglow time. The method of determining the authenticity of the valuable document comprises revealing the hidden security marking on the valuable document. The revealing of marking is carried out by registration of afterglow of its material after removal of the exciting radiation and/or by registration of the diffuse reflection of the material in the optical range of wavelengths from 0.76 mcm to 10 mcm. Violation of the predetermined information indicates full or partial forgery.

EFFECT: increase in the level of protection of the valuable document against forgery.

13 cl, 4 ex

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