JP4345396B2 - Verification system and verification aid used therefor - Google Patents

Description

  The present invention relates to a verification system in the technical field of security countermeasures applying the phenomenon of magnetic resonance, particularly a nuclear quadrupole resonance, and a verification system for verifying whether an object to be verified is a genuine product or a counterfeit product, and a verification system used therefor Concerning auxiliary bodies.

  Conventionally, various methods for using a material having magnetic resonance for authenticity determination have been proposed. This utilizes a radio frequency resonance phenomenon that occurs when there is no static field outside. In this method, a substance that causes a resonance phenomenon is provided on a label, and a resonance peak generated by an electromagnetic wave irradiated from a verification machine is detected by a detector.

  The resonance phenomena used here include nuclear magnetic resonance in ferromagnets, nuclear magnetic resonance in antiferromagnets, nuclear magnetic resonance and nuclear quadrupole resonance in ferrimagnets, very weak field electron spin resonance, Examples include a magnetic dipole or resonance caused by a tunnel transition between Stark and Zeeman sublevels.

When these resonance phenomena are used, a resonance peak can be obtained without applying a strong external magnetic field, unlike the case of general nuclear magnetic resonance. Therefore, since it is possible to determine the authenticity by simply irradiating the medium to be verified with a radio wave having a frequency that causes resonance, it is possible to perform the authenticity determination with a simple and portable verification machine.
JP 10-509815A (page 8)

  However, there are some problems with these verification techniques.

(1) Cost issues:
Since these magnetic resonance substances are special materials, they are generally very expensive. Therefore, it is desirable to reduce the amount used. However, in order to perform reliable verification, it is necessary to add the resonance substance to at least a verifiable amount, and thus the cost increases.

(2) Problems with design and security measures:
As described above, if the amount of the material added is increased to such an extent that it can be verified, the increased portion becomes more colored than the other portions and impairs the appearance design of the article. In some cases, the risk of predicting the presence of some kind of security material cannot be denied.

(3) Another security countermeasure problem:
Generally, a verification machine for detecting a resonance peak obtained by irradiating electromagnetic waves to such a magnetic resonance substance is easy to carry and portable.For example, when the verification machine is stolen, There is a risk of being used as a verifier to create counterfeit products.

The object of the present invention has been proposed in view of the above-mentioned problems. The purpose of the present invention is, first of all, the adaptability to the cost reduction for the use of powerful electromagnetic waves and the use of expensive materials. In addition, it is to have the adaptability to the security measures to prevent the occurrence of counterfeit products based on the analysis of the verification machine, etc.
It is an object of the present invention to provide a verification system and a verification auxiliary body suitable for these.

The invention according to claim 1 of the present invention for achieving the above object is as follows:
When verifying whether the verification object is genuine or counterfeit, at least
(A) an object to be verified that has been provided with at least a portion of ink containing a magnetic resonance substance that is a material that generates magnetic resonance to prevent forgery;
(B) a verification auxiliary body that is provided with a magnetic resonance substance at least in part and is used for verification so as to be exposed to electromagnetic waves together with the single object to be verified;
(C) an electromagnetic wave irradiation means for irradiating an electromagnetic wave for confirming the occurrence of magnetic resonance;
(D) a verification machine for detecting magnetic resonance generated by irradiation of the electromagnetic wave;
And performing verification by using the presence or absence of occurrence of magnetic resonance,
The amount of the magnetic resonance substance of the inks provided on the anti-counterfeit medium is smaller than the amount that the verification machine can detect the magnetic resonance, and the amount of the magnetic resonance substance of the inks provided on the anti-counterfeit medium The verification system is characterized in that the verification is performed so that the total amount of the magnetic resonance substance with the amount of the magnetic resonance substance provided in the verification auxiliary body reaches an amount by which the verification machine can detect the magnetic resonance. .

The invention according to claim 2 of the present invention is the invention according to claim 1,
When the object to be verified is alone, even if the electromagnetic wave is irradiated from the electromagnetic wave irradiation means, the verification machine cannot detect magnetic resonance, and when the same object to be verified and the verification auxiliary are combined, When the electromagnetic wave is radiated from the electromagnetic wave irradiation means and the verification machine can detect magnetic resonance, the verification system determines that the verification target is an authentic product.

The invention according to claim 3 of the present invention is the verification system according to claim 1 or 2, wherein
The amount of the magnetic resonance material of the inks provided in the verification object subjected to the forgery prevention and the amount of the magnetic resonance material provided in the auxiliary body for verification are the amount of the magnetic resonance material occupying per unit area, respectively. It is the verification system characterized by being.

  The invention according to a fourth aspect of the present invention is the verification system according to any one of the first to third aspects, wherein the magnetic resonance substance includes a nuclear quadrupole resonance, a nuclear magnetic resonance in a ferromagnetic material, and an antiferromagnetic material. Materials that generate at least one resonance among the nuclear magnetic resonance in the magnetic field, the nuclear magnetic resonance in the ferrimagnetic material, and the electron spin resonance in the very weak field. Verification using at least one of nuclear magnetic resonance in a body, nuclear magnetic resonance in an antiferromagnetic material, nuclear magnetic resonance in a ferrimagnetic material, and electron spin resonance in a very weak field System.

  In the invention according to claim 5 of the present invention, when verifying whether a verification object is a genuine product or a counterfeit product, a single verification target product provided with a magnetic resonance substance at least in part to prevent forgery And an auxiliary body provided with at least a part of a magnetic resonance substance, which is a material that generates magnetic resonance, and is used for verification by being exposed to electromagnetic waves together with the amount of the magnetic resonance substance of the single object to be verified. The total amount of the magnetic resonance substance with the amount of the magnetic resonance substance of the auxiliary body is an amount for the verification that the verification machine can detect the magnetic resonance due to the electromagnetic wave irradiated from the electromagnetic wave irradiation means. .

The invention according to claim 6 of the present invention is the verification auxiliary body according to claim 5, wherein the magnetic resonance substance includes nuclear quadrupole resonance, nuclear magnetic resonance in a ferromagnetic material, nuclear magnetic resonance in an antiferromagnetic material, The substance that generates at least one of the magnetic resonances of nuclear magnetic resonance and very weak electron spin resonance in ferrimagnetic materials is used. For verification, using at least one resonance among nuclear magnetic resonance, nuclear magnetic resonance in an antiferromagnetic material, nuclear magnetic resonance in a ferrimagnetic material, and electron spin resonance in a very weak field It is an auxiliary body.

  The verification system of the present invention and the verification auxiliary body used therefor can have an adaptability to cost reduction for the use of powerful electromagnetic waves and the use of expensive materials. Therefore, it is possible to provide an adaptability to security measures for preventing the generation of counterfeit products based on the analysis of the verification machine, and it is possible to provide a suitable verification system and verification auxiliary body in these verifications.

  Furthermore, for example, securities such as gift certificates and credit cards, especially high-priced or important items requiring high security measures, authentication of authenticity, for example, brand products and high-class items that are generally highly desired. It can be used for anti-counterfeiting measures to detect and deter counterfeiting for application to expensive items, etc., and has anti-counterfeiting technology suitable for these needs. It is a forgery prevention technique that can provide a visual effect, and is effective as a verification system that can be applied to a forgery prevention transfer foil, a forgery prevention sticker, or a forgery prevention medium having a verification function.

  Hereinafter, the embodiment of the present invention will be described in more detail with reference to the drawings. FIG. 1 is a schematic side view showing an embodiment of a verification system according to the present invention. It comprises a machine 1, an object to be verified 11, and a verification auxiliary body 21.

  As shown in FIG. 1, the object to be verified 11 and the verification auxiliary body 21 are each composed of at least base materials 12 and 22 and magnetic resonance substances 13 and 23, respectively. Is irradiated to the overlapped verification target 11 and verification auxiliary body 21.

  The verifier 1 has a function of generating an electromagnetic wave for causing a magnetic resonance phenomenon and a function of detecting a resonance peak due to the resonance phenomenon generated thereby. Although FIG. 1 shows a single detector having both the electromagnetic wave generation function and the resonance peak detection function, these may be separated. A so-called radio wave having a frequency of several tens to several hundreds of MHz is used as the electromagnetic wave irradiated by the verification device 1.

  As a detection method of the resonance phenomenon by the verification machine 1, a known detection method used in nuclear magnetic resonance (NMR) can be used, and a continuous wave method and a pulse method are known. The continuous wave method is a method of continuously radiating radio waves having a frequency at which resonance occurs. In this case, a conventionally known detector is used, and the resonance absorption peak detected there is read with an oscilloscope or the like. On the other hand, the pulse method is a method of irradiating an electromagnetic wave having a frequency at which resonance occurs for a short time of microsecond level. In this case, the free induction decay of the magnetic spin generated by the irradiation is detected and Fourier transformed. Resonance absorption peak is detected.

  At the time of detection of nuclear magnetic resonance (NMR), in order to create an energy level for resonance by splitting H nuclei, N nuclei, etc. in the magnetic resonance material, the Zeeman splitting at the time of electromagnetic wave irradiation It is necessary to apply a strong external magnetic field.

  However, the resonance due to the magnetic resonance phenomenon used in the present invention, such as nuclear quadrupole resonance, nuclear magnetic resonance in ferromagnet, nuclear magnetic resonance in antiferromagnet, nuclear magnetic resonance in ferrimagnet, and very weak field electron spin resonance. Unlike the detection of nuclear magnetic resonance (NMR), the detection of the absorption peak does not require an external magnetic field, so that it is not necessary to apply a strong external magnetic field.

  Since the configuration of the verification target 11 and the verification auxiliary body 21 are substantially the same, the verification target 11 will be described in detail below as an example.

  The object to be verified 11 is obtained by coating or printing inks mainly composed of the magnetic resonance substance 13 on the base 12. As the base material 12, conventionally known materials such as paper, plastic, film, wood, glass, and metal can be used.

  The magnetic resonance substance 13 is a substance that receives an electromagnetic wave irradiated from the verification machine 1 and causes a magnetic resonance phenomenon. In the nuclear quadrupole resonance, resonance occurs in an atom having a nuclear spin of 1 or more, for example, 11B, 35Cl, 75As, 127I, etc., and resonates at a frequency of several MHz to several hundred MHz. In addition, the nuclear magnetic resonance of a ferromagnetic material such as 55Mn, 57Fe, and 59Co, an antiferromagnetic material, or a ferrimagnetic material is the same as that already applied with an atomic level magnetic field, and an external magnetic field is applied again. Without causing resonance phenomenon in the radio frequency band. In addition, electron spin resonance also causes resonance to electromagnetic waves in the microwave band, usually by applying an external magnetic field. Conversely, when no magnetic field is applied, resonance in a lower frequency band of radio waves is obtained. Can do.

  One of the features of these resonance phenomena is that even if there is a concentration distribution of the magnetic resonance substance 13 in the thickness direction (depth direction), the whole can be detected. That is, for example, when considering a product in which the magnetic resonance substance 13 is applied to the surface of paper to prevent forgery, when several products are overlapped, not only one but also several stacked magnetic resonances. The substance 13 resonates and a very strong resonance peak can be obtained as a whole. In the present invention, this feature is actively utilized. Of course, an action equivalent to the superposition here, for example, a method of bonding, fitting, and embedding has the same effect and is included in the scope of the present invention.

  In providing the magnetic resonance substance 13 on the substrate 12, a method of printing or applying an ink or paint prepared by dispersing fine particles of the magnetic resonance substance 13 in a resin can be used.

  Examples of the resin include general resins such as vinyl resins, acrylic resins, urethane resins, polyester resins, and cellulose resins, thermosetting resins obtained by adding a crosslinking agent to these resins, ultraviolet curable resins, and visible light curable resins. Conventionally known resins such as photo-curable resins such as can be used, and these are dissolved in a solvent such as a gravure solvent or a screen solvent, and further, the magnetic resonance substance 13 is dispersed, thereby being used for printing or coating. Inks are prepared, but usable resins and the like are not limited to those listed here. In addition, you may add adjuvants, such as a dispersing agent for improving the dispersibility of the magnetic resonance substance 13, and a leveling agent for improving printability.

  In the present invention, the verification auxiliary body 21 can be created in the same manner as the verification target body 11.

  Next, the relationship between the detection level of the verification device 1 and the amount of the magnetic resonance substance 13 in the present invention will be described. In the present invention, the amount of the magnetic resonance substance 13 is determined between the verification target 11 and the verification auxiliary body 21. Together, both are set to an amount at which a detection peak exceeding the detection level of the verifier 1 is obtained.

If the amount of the magnetic resonance substance 13 that can be detected at the detection level of the verification machine 1 is 10, the amount of the magnetic resonance substance 13 provided in the verification object 11 is 5, and the magneticity provided in the verification auxiliary body 21. The amount of the resonance substance 13 may be 5, or either one may be increased and the other may be decreased. Alternatively, the amount of the magnetic resonance substance 13 of both the verification target 11 and the verification auxiliary body 21 may be 6 or 7 for example, and at least an amount that cannot be verified alone (for example, less than 10). However, the amount may exceed the lower limit amount (for example, 10) that can be verified in total.

  In the verification system of the present invention, the reason why the verification auxiliary body 21 is used for authenticating the verification target 11 and the amount of the magnetic resonance substance 13 provided in each of the verification target 11 and the verification auxiliary 21 are described above. The reason for setting the amount is as follows.

(1) Cost issues:
These magnetic resonance materials 13 are materials necessary for security, and are special materials that are used after being tuned to a necessary resonance frequency according to the purpose, so that they are generally very expensive. Therefore, it is desirable to reduce the amount used. However, in order to perform reliable verification, it is necessary to add the resonance substance to at least a verifiable amount, and an amount verifiable by the verification target 11 alone is added to each verification target 11. Will have to. Therefore, if the resonance substance 13 is added to an amount that can be verified with respect to all of the objects to be verified 11 as products on the market, the amount of the magnetic resonance substance 13 used becomes enormous and the cost increases. However, as in the verification system of the present invention, if the verification auxiliary body 21 is overlaid on the verification target 11 as each individual product and the verification is possible for the first time, each verification target is performed. The amount of the magnetic resonance substance 13 added to the body 11 is less than half of the amount that can be verified by the body 11 alone or about 10% in some cases, which is clearly advantageous in terms of cost. is there.

(2) Problems with design and security measures:
Since the magnetic resonance substance 13 is not transparent, when the addition amount of the magnetic resonance substance 13 is increased to a level that can be verified by the tested object 11 alone, the increased part becomes more colored than the other part, and the article The appearance design is damaged. In some cases, the risk of predicting the presence of some security material cannot be denied. However, as in the verification system of the present invention, if the verification auxiliary body 21 is overlaid on the verification target 11 as each individual product and the verification is possible for the first time, each verification target is performed. The amount of the magnetic resonance substance 13 added to the body 11 is less than half the amount that can be verified by the subject 11 alone, or about 10% in some cases. The coloring property of the product due to the above can be suppressed, the appearance design of the product can be prevented from being impaired, and the risk of predicting the presence of the security material can be avoided.

(3) Another security countermeasure problem:
In general, the verification machine 1 is easy to carry and has portability. Therefore, if the verification machine 1 is stolen, there is a risk of being used as a verification machine for creating a counterfeit product. However, as in the verification system of the present invention, the amount of the magnetic resonance substance 13 can be verified only when the verification target 11 and the verification auxiliary body 21 cannot be verified individually and are superimposed. By adjusting and setting the amount, there is a great merit that the generation of counterfeit products can be prevented.

  Hereinafter, the present invention will be described in detail with reference to specific examples.

  First, a magnetic resonance ink having the following composition was prepared.

・ Magnetic resonance material (manufactured by Microtag Co., Ltd.) 1 part by weight ・ Byron 200 (polyester resin) 9 part by weight ・ Methyl ethyl ketone 45 part by weight ・ Toluene 45 part by weight A magnetic resonance ink (gravure printing ink) dispersed in a polyester resin was obtained. Using this ink, various types of ink film thickness were applied to general high-quality paper according to Example 1, Example 2, Example 3, Example 4, Comparative Example 1, and Comparative Example 2 shown in Table 1 below. Gravure printing was performed to obtain the tested object 11 and the verification auxiliary body 21.

  Next, with respect to each verification target 11 and verification auxiliary body 21 obtained in Examples 1 to 4 and Comparative Examples 1 and 2, using the dedicated verification machine 1 manufactured by Microtag, the verification target 11 The detection of the resonance absorption peak in the case of the single substance and the detection of the resonance absorption peak in the case where the verification object 11 and the verification auxiliary body 21 are superposed are performed. The detection results and verification results are shown in Table 1.

<Evaluation>
As shown in Table 1, in all of the detections in Examples 1 to 4 in the case of the object 11 alone, the verification machine 1 was unable to detect the resonance absorption peak (x). In all of the detections when 11 and the verification auxiliary body 21 are overlapped, the verification machine 1 can detect the resonance absorption peak (◯), and a good result is obtained that enables true / false determination. .

  Further, in Comparative Example 1, since the ink film thickness of each of the verification target 11 and the verification auxiliary body 21 is thin, the verification target 11 and the verification auxiliary body 21 are overlapped even in the case of the verification target 11 alone. In both cases, the verification machine 1 cannot detect the resonance absorption peak (x), and cannot determine the authenticity.

  Further, in Comparative Example 2, since the ink film thickness of the verification target 11 is thick, both the verification target 11 alone and the verification target 11 and the verification auxiliary body 21 are overlapped. The machine 1 is capable of detecting the resonance absorption peak (◯), so that the authenticity determination is impossible.

  In particular, taking Example 2 as an example, the total coating thickness that can be verified is 4 μm, but the coating thickness for each verification target 11 as a product may be a quarter of 1 μm, and the remaining 3 μm is verified. By providing the auxiliary body 21 for use, verification as a whole becomes possible.

  By the way, the amount of the magnetic resonance substance 13 in the verification target 11 as a product widely distributed in the market is a quarter, and the verification auxiliary body 21 is verified at each of several places where the verification machine 1 is installed. For example, only one to several pieces may be installed, and the amount of the magnetic resonance substance 13 is substantially reduced to about one quarter. Therefore, in the second embodiment, the cost of the magnetic resonance substance 13 can be reduced to about a quarter.

  Moreover, compared with the comparative example 2 which applied the whole quantity of the amount required for a detection, coloring of the surface of the printed to-be-verified object 11 is considerably thin in Examples 1-4, and apparently magnetic. The coloring due to the resonance substance 13 was suppressed to a small level, and good results were obtained in terms of appearance and design. In particular, in Example 2, it was possible to suppress the coloring to such an extent that the magnetic resonance substance 13 was applied almost without being conscious.

  Furthermore, even if the verification machine is taken out from the verification place, the authenticity determination is impossible without the verification auxiliary body 21, and the risk of forgering the verification target 11 is extremely low.

BRIEF DESCRIPTION OF THE DRAWINGS The outline | summary side view explaining embodiment of the verification system and verification auxiliary body of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Verification machine 11 ... To-be-verified object 12 ... Base material 13 ... Magnetic resonance substance 21 ... Auxiliary object for verification 22 ... Base material 23 ... Magnetic resonance substance
101 ... electromagnetic wave

Claims (6)

When verifying whether the verification object is genuine or counterfeit, at least
(A) an object to be verified that has been provided with at least a portion of ink containing a magnetic resonance substance that is a material that generates magnetic resonance to prevent forgery;
(B) a verification auxiliary body that is provided with a magnetic resonance substance at least in part and is used for verification so as to be exposed to electromagnetic waves together with the single object to be verified;
(C) an electromagnetic wave irradiation means for irradiating an electromagnetic wave for confirming the occurrence of magnetic resonance;
(D) a verification machine for detecting magnetic resonance generated by irradiation of the electromagnetic wave;
And performing verification by using the presence or absence of occurrence of magnetic resonance,
The amount of the magnetic resonance substance of the inks provided on the anti-counterfeit medium is smaller than the amount that the verification machine can detect the magnetic resonance, and the amount of the magnetic resonance substance of the inks provided on the anti-counterfeit medium A verification system characterized in that verification is performed such that the total amount of magnetic resonance substance with the amount of magnetic resonance substance provided in the verification auxiliary body reaches an amount by which the verification machine can detect magnetic resonance.   When the object to be verified is alone, even if the electromagnetic wave is irradiated from the electromagnetic wave irradiation means, the verification machine cannot detect magnetic resonance, and when the same object to be verified and the verification auxiliary are combined, 2. The verification system according to claim 1, wherein when the verification machine can detect magnetic resonance by irradiating electromagnetic waves from the electromagnetic wave irradiation means, the verification object is determined to be genuine.   The amount of the magnetic resonance material of the inks provided in the verification object subjected to the forgery prevention and the amount of the magnetic resonance material provided in the auxiliary body for verification are the amount of the magnetic resonance material occupying per unit area, respectively. The verification system according to claim 1 or 2, wherein   Among the magnetic resonance materials, a nuclear quadrupole resonance, a nuclear magnetic resonance in a ferromagnet, a nuclear magnetic resonance in an antiferromagnet, a nuclear magnetic resonance in a ferrimagnet, and an electron spin resonance in a very weak field, Using at least one resonance-producing substance, the verification includes nuclear quadrupole resonance, nuclear magnetic resonance in ferromagnets, nuclear magnetic resonance in antiferromagnets, nuclear magnetic resonance in ferrimagnets, very weak field 4. The verification system according to claim 1, wherein at least one of each magnetic resonance of electron spin resonance is used.   When verifying whether an object to be verified is a genuine product or a counterfeit product, a magnetic resonance substance is provided in at least a part of the product to be exposed to electromagnetic waves together with a single object to be verified that has been counterfeited. An auxiliary body provided with at least a portion of a magnetic resonance substance that is used and a material that generates magnetic resonance, the amount of the magnetic resonance substance of the single object to be verified; and the amount of the magnetic resonance substance of the auxiliary body; The verification auxiliary body, wherein the total magnetic resonance substance amount is an amount by which the verification machine can detect magnetic resonance due to the electromagnetic waves irradiated from the electromagnetic wave irradiation means.   Among the magnetic resonance materials, a nuclear quadrupole resonance, a nuclear magnetic resonance in a ferromagnet, a nuclear magnetic resonance in an antiferromagnet, a nuclear magnetic resonance in a ferrimagnet, and an electron spin resonance in a very weak field, At least one substance that generates resonance is used. For the verification, nuclear quadrupole resonance, nuclear magnetic resonance in ferromagnet, nuclear magnetic resonance in antiferromagnet, nuclear magnetic resonance in ferrimagnet, 6. The verification auxiliary body according to claim 5, wherein at least one of the magnetic resonances of the electron spin resonance in the weak field is used.