RU2616643C1 - Method for producing valuable document protected from partial forgery, and received document - Google Patents

Abstract

FIELD: physics.

SUBSTANCE: method for producing a valuable document is described, that is protected from the partial forgery by composing from fragments of other documents. The method comprises applying, at least, one serial number to the document pictorial field, and applying a marking to the extended portion of the document pictorial field, made in the form of blocks of the graphic elements forming a personalized security document code. The linear size of each graphic element is from 0.1 to 1.0 mm, the technical gaps between the blocks of the graphic elements are not more than 25% of the linear dimension of these blocks, but not less than the size of one graphic element.

EFFECT: producing a valuable document with an increase in the reliability of the instrument to determine its authenticity.

7 cl, 3 dwg, 3 ex

Description

The invention relates to the field of protection of various types of documents from counterfeiting with the possibility of subsequent instrumental determination of the authenticity of such printing products as banknotes, forms of securities, passports, travel documents, etc.

There are known cases of falsification of valuable documents, in particular banknotes and passports, in which only a partial forgery of the document is carried out by entering unauthorized information, or, which is more common in the case of banknotes, the production of composite documents. In this case, a compound document, or a composite banknote, represents sections of a genuine banknote glued or otherwise sealed with sections of a falsified banknote. Also known is the type of fraud in which all sections of a compound banknote are genuine, and the counterfeiter’s benefit is to profit from the sale of a compound banknote consisting of sections of three or more banknotes, and officially return funds for the remaining “preserved” banknote sections, as for whole but damaged, for example partially burned, banknotes.

You can deal with this type of fraud by comparing serial numbers located on opposite coupon fields of a banknote (if they, in turn, were not subjected to partial counterfeiting and erasure).

However, this method is inconvenient due to the need to maintain a database of citizens' appeals in various regions of the country, which is associated with certain organizational and bureaucratic procedures.

In addition, the described method, in principle, is not applicable for high-speed control of banknotes on the counting and sorting technique. In addition, you can allow a way to fake a document, in which the numbers will remain on the original sections of the document, not subject to partial falsification.

In the prior art, various methods are known for protecting valuable documents from counterfeiting using elements of graphic protection and information encoding.

These solutions include RU 2326005 C2, which describes a graphic element made using two types of printing, one of which is made with a contrasting substrate in the form of a background image, and the second type with optically variable properties is applied using the second type of printing (flexographic or screen), applied on top of the first so that when viewed it seems translucent.

This solution is focused on visual verification of the authenticity of banknotes and other valuable documents and does not allow automatic control of composite (partially counterfeited) banknotes.

A solution is known according to RU 2193232 C2, in which it is proposed to use a diffractive structure to protect banknotes, which is "easy" to read and difficult to fake. In this case, the diffraction structure has a certain number of sites (forms) that differ in scattering and reflective properties, and their location is not visible to the naked eye.

A disadvantage of the known solution is that to determine the features of diffraction structures (having a resolution, or a grating period, of the order of 0.5-1 μm for the optical range of the spectrum, which corresponds to a scan resolution of more than 25000 dpi), the resolution of conventional scanners of bill acceptors and sorting machines, usually not exceeding 150-200 dpi.

A solution is known from RU 2452030 C1, which describes a method for determining fake composite documents by analyzing various parts of an image, constructing mathematical relationships of given points of a document, and searching for gradient values of the resulting signal characterizing the degree of connection of given points of a document. If the gradient values of the bonds do not correspond to the normal values, a document is faked. However, this solution is quite difficult to implement, as it is based on statistical methods and with mass use will give unstable results on worn and dirty documents.

Closest to the proposed invention is a method involving applying to a valuable document markings with complex spectral characteristics in the visible and infrared ranges of the spectrum and at the same time additional marking with re-emission in the same spectral ranges (RU 2523812 C2).

However, the known method does not provide reliability during authentication and is complex.

The objective of the present invention is to develop a method of manufacturing a valuable document, protected from partial falsification, involving the compilation of this document from fragments of other documents, while the developed method of manufacturing a document should ensure the reliability and ease of establishing the authenticity of the document.

The problem is solved by the claimed method of manufacturing a valuable document that is protected from partial falsification by composing fragments of other documents, which includes applying at least one serial number to the painting field of the document and applying a marking document made in the form of blocks of graphic elements to the extended section of the painting field, forming a personalized code of the protected document, while the linear size of each graphic element is from 0.1 to 1.0 mm, and the technical e gaps between blocks of graphic elements is not more than 25% of the linear dimension of these blocks but not least the size of one graphical element.

In addition, the method of manufacturing a valuable document may be characterized in that the marking is carried out by a printing method, an inkjet or thermal transfer printing method, or a laser engraving method, or by selectively removing coating portions by a chemical method, or by laser processing a laser-active layer.

The method may also be characterized in that the marking is made of graphic elements in the form of geometric figures, guilloche elements, graphic and alphanumeric characters, strokes of constant and / or different widths, forms an encoding or any combination of all of the above.

In this case, the marking can be performed on a foil deposited on the surface of the document carrier, or made on a security thread introduced into the composition of the document carrier, and may also contain an additional device-defined or visualized security feature. In addition, the marking can be made contrast or invisible in the visible range of the optical spectrum when observed in reflection or in clearance.

A valuable document made by the proposed method may be a banknote, passport, travel document, excise or postage stamp, driver’s license, identity card, security, plastic card or other valuable document.

The implementation of the invention in the scope of the claimed combination of features ensures the achievement of a technical result, namely the reliability and simplicity of controlling the authenticity of a document, since it takes into account the following.

When conducting an analysis of the authenticity of a document, the encoded information itself is not of interest (since it is deterministic, i.e., known in advance). The main result of the analysis is the fact of information distortion caused by the replacement or offset of a fragment of a valuable document, or encoded information is read or not. In the latter case, the document is partially forged or composite. The encoded information may contain the serial number of the document or other personalized data.

In addition, the claimed method takes into account that the vast majority of scanners of counting and sorting equipment, including sensors of validators of bill acceptors and counting and sorting machines, have a typical resolution of 75 to 200 dpi ("dots per inch") or less. Therefore, to control the authenticity of documents, such as banknotes, it is preferable to use graphic elements with a size of at least 0.1 × 0.1 mm. At the same time, taking into account the artistic requirements for the protection and design of banknotes, it is preferable not to use them as part of guilloche elements, nets, etc. graphic elements with line thicknesses of more than 0.7-1.0 mm. Given the actual size of banknotes (on average, 150 × 65 mm) and restrictions on the size of guilloche elements placed on them (1-2 cm ² ), on the one hand, and the typical resolution of scanners of control devices (bill acceptors and counting and sorting machines), with on the other hand, it is clear that from the point of view of technical registration, solutions in which the pixel dimensions are not less than 0.1 mm and do not exceed 1.0 mm in both spatial dimensions are of interest.

The essence of the invention is illustrated by examples and figures 1-3.

In FIG. 1 illustrates example 1, in FIG. 2 illustrates example 2, FIG. 3 illustrates example 3.

Example 1

A method of manufacturing a valuable document in the form of a banknote (Fig. 1), which consists in applying an offset method of printing a pictorial field on a paper substrate (pos. 2 of Fig. 1), printing in a high way a serial number (pos. 1 of Fig. 1) and ink-jet printing printing contrast marking along the long side of the banknote made of repeating blocks of graphic elements in the form of a QR code containing encoded information in the form of the serial number of the banknote (item 3 of Fig. 1).

Blocks of graphic elements in the form of a QR code of size 9 × 9 mm are formed from elements in the form of squares with a side size of 0.9 × 0.9 mm and are spaced from each other at the distance of one graphic element, that is, 0.9 mm.

The labeling also includes material based on the inorganic luminescent compound Sr Al ₂ O ₄ : Eu, Dy, characterized by green luminescence under the influence of UV radiation in the wavelength range of 330-370 nm and an afterglow time of 10 seconds or more.

When scanning a banknote with a scanner of a counting and sorting machine, each block of graphic elements is detected and read in the form of a barcode, and the encoded information about the serial number of the banknote is recorded. Successful reading of the encoded information of each barcode, the correspondence of each block to each other and the serial number printed on the banknote, indicates that the banknote is not composite.

Also, when a banknote is irradiated with a source of exciting UV radiation due to the property of reradiation of the material included in the marking, an image of a continuous bar-code bar appears in the visible spectrum with information about the serial number, which is stored for 10 seconds after turning off the source of exciting radiation and can be read by a special scanner.

Example 2

A method of manufacturing a valuable document in the form of an insurance policy form, which consists in applying an offset method to print a pictorial field on a paper substrate (pos. 2 of Fig. 2), printing in a high way a serial number (pos. 3 of Fig. 2) and applying a colorless marking to the thermal transfer method over the entire field of the blank, as shown in FIG. 2 made of repeating blocks of graphic elements in the form of barcodes containing encoded information about the serial number of the form (pos. 1 of Fig. 2).

The marking contains an inorganic compound based on the Sb: Sn alloy, which has an absorption of optical radiation in the wavelength range of 1200-1500 nm.

Blocks of graphic elements with a size of 10 × 10 mm are formed from elements in the form of rectangles with a side size of 0.5 × 0.5 mm and are separated from each other at a distance of 2 mm.

When using a barcode scanner operating in the wavelength range of 1200-1500 nm, each block of graphic elements is detected and read in the form of a barcode and the encoded information about the serial number of the form is recorded. Successful reading of the encoded information of each barcode, the correspondence of each block to each other and the serial number printed on the form, indicates that it is not composite.

Example 3

A method of manufacturing a valuable document in the form of a banknote (Fig. 3), which consists in the manufacture of base paper with a protective thread in the form of a metallized strip with repeated marking in the form of blocks of graphic elements containing a code (pos. 1 of Fig. 3) and made by laser processing surface, followed by offset printing of the painting field on a paper substrate (pos. 2 of Fig. 3) and printing with a high method of a serial number (pos. 3 of Fig. 3).

Blocks of graphic elements with a size of 20 × 20 mm are formed by elements in the form of squares with a side of 0.5 × 0.5 mm and are separated from each other at a distance of 1 mm.

The security thread further comprises a coating made using an inorganic compound Fe ₃ O ₄ having absorption of optical radiation in the optical wavelength range and having magnetically hard properties, intended for instrument registration.

When scanning a banknote with a scanner of a counting and sorting machine, each block of graphic elements is detected and read on a security thread, and the encoded information is recognized and recorded. Successful reading of the encoded information of each barcode and the correspondence of each block to each other indicate that the banknote is not composite.

When using a magnetic scanner, an additional magnetic security feature is detected and read on the security thread, characterizing the authenticity of the banknote.

Claims (7)

1. A method of manufacturing a valuable document that is protected from partial falsification by composing fragments of other documents, including applying at least one serial number to the painting field of the document and applying a marking document to the extended section of the painting field made in the form of blocks of graphic elements forming a personalized protected code document, while the linear size of each graphic element is from 0.1 to 1.0 mm, and the technical gaps between the blocks of the graphic element to make up no more than 25% of the linear dimension of these blocks, but not less than the size of one graphical element. 2. A method of manufacturing a valuable document according to claim 1, characterized in that the marking is made by any printing method of printing, including methods of inkjet and thermal transfer printing. 3. A method of manufacturing a valuable document according to claim 1, characterized in that the marking is made using laser engraving or laser processing of the laser-active layer of the document carrier. 4. A method of manufacturing a valuable document according to claim 1, characterized in that the marking is made on a foil deposited on the surface of the document carrier or is made on a security thread introduced into the document carrier. 5. A method of manufacturing a valuable document according to claim 1, characterized in that the marking contains an additional instrument-defined or visualized security feature. 6. A method of manufacturing a valuable document according to claim 1, characterized in that the graphic elements forming the marking are geometric figures, guilloche elements, graphic and alphanumeric characters, strokes of constant and / or different widths, or any combination of the above. 7. Valuable document made according to any one of paragraphs. 1-6, characterized in that it is a banknote, passport, travel document, driver’s license, identification card, security, plastic card.

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