RU2150749C1 - Tool for protection of securities and documents against faking - Google Patents

Abstract

FIELD: protection of bank- notes, securities, and documents. SUBSTANCE: tool is used as label, which is designed as paint, which is applied over protected material and contains Os187 in FeBO3 matrix or Fe57 under condition that ratio of Os187 weight to material weight is within range of 1:1 to 1: 10. Content of Os187 in label is within range of 1 to 4.5 mcg. In another embodiment, label is designed as polycrystalline spinel structure, which is applied on protected material as spot or character and contains Os187 and FeBO3 or Fe57 under condition that ratio of Os187 weight to material weight is within range of 1:1 to 1:10. Area of glue that covers said spot or character, is greater than area of spot or character. Content of Os187 in label is within range of 1 to 4.5 mcg. EFFECT: simplified manufacturing. 7 cl

Description

 The invention relates to the field of protection against counterfeiting of securities and documents.

 Currently, direct financial losses due to counterfeiting of banknotes, credit cards and securities are significant amounts, due to the fact that the modern level of computing, analytical and multiplying equipment allows reproducing at any relatively low cost almost any security in any quantity.

 This problem is especially acute in the case of mass products, for example money, when the cost of manufacturing and protection against counterfeiting should be minimal. In addition, the label should be quickly and easily detected.

 There are various methods for protecting money and securities from counterfeiting. A significant part of them consists of methods of protection using metal marks, and the mark can be formed by direct application of the material, usually in the form of paint, onto a security paper, and by applying a product made of metal, such as strips, onto paper.

 Known means of protection against counterfeiting securities, in which a special image is applied to the paper using magnetic printing ink. Registration of the label is carried out by a magnetic detector (GB, N 2079506, class G 07 D 7/00, 1982). However, this tool is quite easy to reproduce.

 Also known is a means to protect securities from counterfeiting, consisting of a strip of magnetic material pressed into paper. The authenticity of a security is also determined using a magnetic detector detecting a change in magnetic field strength (EP, N 0057520, class G 07 D 7/00, 1982). However, this tool is also not reliable enough, because does not exclude the possibility of fake, because the manufacture (fake) of a strip of magnetic material is not a technical difficulty.

Closest to the proposed is a security measure against counterfeiting of securities and documents, made in the form of a strip or thread containing O _S ¹⁸⁷ (W098 / 12671, CL G 07 D 7/00, 1998). The strip (thread) is either fixed to the surface of the material of the protected object by gluing, or pressed into the material. Reliable protection in this case is ensured by using a unique material as a label, the development of which requires such a level of labor that is available only to the state or a large bank. At the same time, the cost of the mark itself on a separate bill is insignificant due to the fact that in order to ensure error-free identification of the mark, very small quantities of material for marking are required. Isotope extraction of O _S ¹⁸⁷ is a complex, expensive, and lengthy process, as well as isotopes of other heavy elements such as tungsten, platinum, iridium, etc. However, it is the O _S ¹⁸⁷ isotope that makes it possible to implement a rather fast, cheap, and reliable method for detecting authenticity against specific nuclear magnetic properties of the isotope O _S ¹⁸⁷ .

However, the manufacture of such a means of protection against counterfeiting is technically difficult, because the production of a thread or strip containing O _S ¹⁸⁷ requires special techniques. An embodiment in which a thread or strip is pressed into the material requires significant technological costs. The option in which the strip adheres to the surface of the material to be protected does not provide sufficient reliability; it is possible to peel off the strip during the long-term operation of securities.

 An object of the invention is to simplify the method of manufacturing a security measure against counterfeiting securities and documents used as a mark in the manufacture of securities and documents, in particular official state paper, strict reporting forms (licenses for the right type of activity, transport licenses, etc. , tax, customs declarations, etc., certificates of quality, medical, origin of goods, etc., wills, powers of attorney, etc.).

The task in the first embodiment is solved by the fact that in the means of protection against counterfeiting of securities and documents, made in the form of a mark containing O _S ¹⁸⁷ , the mark is made in the form of a paint deposited on the material to be protected, containing O _S ¹⁸⁷ in a FeBO ₃ or Fe ⁵⁷ matrix when the ratio of the mass of O _S ¹⁸⁷ to the mass of the matrix material is from 1: 1 to 1:10, and the content of O _S ¹⁸⁷ in the label is from 1 to 4.5 μg.

To ensure the most stable signal during detection, the isotopic purity of O _S ^{187 is} below 99.4%, and its chemical purity is not lower than 99.9%.

As a rule, the grain size of FeBO ₃ or Fe ⁵⁷ contained in the paint is from 5 to 10 microns.

To provide an additional degree of protection, the anti-counterfeiting means further comprises at least one mark made in the form of a paint containing O _S ¹⁸⁷ applied to the material to be protected, each mark containing a different amount of O _S ¹⁸⁷ .

The task in the second embodiment is solved by the fact that in the means of protection against counterfeiting of securities and documents made in the form of a mark containing O _S ¹⁸⁷ , the mark is made of a polycrystalline spinel structure consisting of O _S ¹⁸⁷ placed on a protected material in the form of a spot or symbol and FeBO ₃ or Fe ⁵⁷ when the ratio of the mass O _S ¹⁸⁷ to the mass of the matrix material is from 1: 1 to 1:10, and a layer of glue is applied over it, the area of which exceeds the area of the spot or symbol, and the content of O _S ¹⁸⁷ in the label is from 1 to 4.5 mcg.

To ensure the most stable signal during detection, the isotopic purity of O _S ^{187 is} not lower than 99.4%, and its chemical purity is not lower than 99.9%.

To provide an additional degree of protection, the anti-counterfeiting means additionally contains at least one mark made of a polycrystalline spinel structure consisting of O _S ¹⁸⁷ and FeBO ₃ or Fe ⁵⁷ placed on the protected material in the form of a spot or symbol, and each mark contains a different the amount of O _S ¹⁸⁷ .

 Both in the first and in the second embodiment, the mark can be made in the form of a spot or symbol of any configuration.

 To increase the reliability of protection, the mark applied to the material of the protected object can have a complex geometric shape, thereby creating a given pattern, while the mark can occupy a significant area on the protected material. At a lower cost of a security, it is advisable to simplify the marking pattern, thereby reducing the cost of manufacturing a security.

A security paper or document may have multiple labels. Changing the content of O _S ¹⁸⁷ from label to label in predetermined ratios allows you to check these ratios when detecting by the amplitude of the detector output signal and thereby creates an additional degree of protection for securities and documents.

As the paint used to form the mark, any paint that is resistant to abrasion can be used; the paint can be applied by any of the known methods, wherein the paint contains O _S ¹⁸⁷ in a FeBO ₃ or Fe ⁵⁷ matrix included in the paint. As the adhesive covering the layers or a particle of a polycrystalline spinel structure consisting of O _S ¹⁸⁷ and FeBO ₃ or Fe ⁵⁷ placed on the protected object, any adhesive having sufficiently good adhesion to the material of the protected layer can be used.

The presence in the label of O _S ¹⁸⁷ in an amount of 1 - 4.5 μg is most preferable, since in an amount less than 1 μg, it becomes difficult to detect the presence of the isotope O _S ¹⁸⁷ , the introduction of an amount of more than 4.5 μg is impractical due to the increase in the cost of protection costs papers from a fake.

 A NMR spectrometer known in the art is used for detection, in which superconducting magnets are used to orient the magnetic fields of the nuclei of the material under study, creating a magnetic field of up to 20 Tesl. Superconducting magnets make up the bulk of the cost of a spectrometer.

The introduction of the O _S ¹⁸⁷ isotope in the form of a compound of O _S ¹⁸⁷ with a ferromagnetic substance allows the use of internal magnetic fields of atoms reaching 500 Tesl and more, because when interacting with the magnetic fields of a ferromagnet, the magnetic fields of atoms are also oriented. This makes it possible to obtain an NMR (nuclear magnetic resonance) signal, i.e. the effect of selective absorption of radiation of a certain radio frequency without the application of powerful external magnetic fields. Also, a favorable characteristic of O _S ¹⁸⁷ is that the nucleus has a spin of 1/2, which means that there is no electric quadrupole moment, which eliminates electrical disturbances.

FeBO ₃ or Fe ⁵⁷ are special materials that make it possible to increase the output signal during detection and, accordingly, reduce the isotope content in the label. A high signal gain in this case is associated with a low magnetic anisotropy field of Fe ⁵⁷ and an extremely low field of FeBO ₃ compounds.

Detection in the case of using as a label compounds O _S ¹⁸⁷ with a ferromagnetic substance is carried out by known methods. When a radio frequency pulse π / 2 (in antiphase with the magnetic moments of the nuclei) generated by the device (detector) is superimposed, the spins of the nuclei “scatter”. At the next pulse π (in phase), the spins of the nuclei return simultaneously to the ground oriented state, which makes it possible to register the so-called spin echo.

Detection is carried out by triggering the device only on the core O _S ¹⁸⁷ resonant frequency of 107.5 MHz.

Modern technologies make it possible to obtain O _S ¹⁸⁷ in the quantities required for the implementation of the method, for example, from rhenium-containing poor and ultra-poor ores or from poor and ultra-poor waste technological solutions. The insignificant amount of the isotope required to make the mark directly on one document or security paper, and the simplicity of the technology of marking the material of the protected object, makes it possible to apply the method on a large scale.

 The NMR method of detecting the authenticity of the tag allows to ensure high accuracy and reliability of the method, and it does not require complex and expensive equipment. Authentication can be done with a device weighing no more than 10 kg.

Claims (7)

1. The security measure against counterfeiting of securities and documents, made in the form of a label containing Os ¹⁸⁷ , characterized in that the mark is made in the form of a paint applied to the material to be protected, containing Os ¹⁸⁷ in a FeBO ₃ or Fe ⁵⁷ matrix with a weight ratio of Os ¹⁸⁷ to the mass of the matrix material is from 1: 1 to 1: 10, and the Os ¹⁸⁷ content in the label is from 1 to 4.5 μg. 2. The counterfeit protective device according to claim 1, characterized in that the isotopic purity of Os ^{187 is} not lower than 99.4%, and its chemical frequency is not lower than 99.9%. 3. The means of protection against counterfeiting according to claim 1 or 2, characterized in that the grain size of FeBO ₃ or Fe ⁵⁷ contained in the paint is from 5 to 10 microns. 4. The anti-counterfeiting means according to any one of claims 1 to 3, characterized in that it further comprises at least one mark made in the form of a paint applied to the material to be protected, containing Os ¹⁸⁷ , each label containing a different amount of Os ¹⁸⁷ . 5. The security measure against counterfeiting of securities and documents, made in the form of a label containing Os ¹⁸⁷ , characterized in that the label is made of a polycrystalline spinel structure consisting of Os ¹⁸⁷ and FeBO ₃ or Fe ⁵⁷ placed on the material to be protected. when the ratio of the mass of Os ¹⁸⁷ to the mass of the matrix material is from 1: 1 to 1: 10, and an adhesive layer deposited on top of it, the area of which exceeds the area of the spot or symbol, and the content of Os ¹⁸⁷ in the label is from 1 to 4.5 μg. 6. The anti-counterfeiting tool according to claim 5, characterized in that the isotopic purity of Os ^{187 is} not lower than 99.4%, and its chemical purity is not lower than 99.9%. 7. The anti-counterfeiting tool according to claim 5 or 6, characterized in that it further comprises at least one mark made of a polycrystalline spinel structure consisting of Os ¹⁸⁷ and FeBO ₃ or Fe ⁵⁷ placed on the material to be protected. paint containing Os ¹⁸⁷ , with each label containing a different amount of Os ¹⁸⁷ .