JP3390146B2 - Counterfeit bill detection or security authentication ink and detection authentication method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for detecting counterfeit bills or authenticating security paper and an ink for the same.

[0002]

BACKGROUND OF THE INVENTION Governments around the world have been worried about the problem of counterfeit bills since the bills were invented and used.
In addition, the exchange of security papers that describe private rights and obligations is indispensable in economic activities and social life, and counterfeiting them is a serious problem as it disturbs social order. Banknotes and security papers are also copied and printed, and with recent advances in electronic copying technology, it is more difficult to distinguish between genuine and counterfeit. Devices and devices that detect counterfeit bills and authenticate security paper while the forgery problem is becoming a more social issue.
Along with machines and the like, methods have been devised in which special invisible chemicals are contained in paper or printed to detect and detect them by light or magnetism. However, many of these devices and systems are also uncertain, mechanically expensive, and in some cases the devices are bulky and often complex in design.

[0003]

SUMMARY OF THE INVENTION The basic object of the present invention is to provide a reliable, quick and easy operation using tools that are easy to handle and inexpensive, do not require expensive and large equipment or complicated operations. It is also to provide a method for detecting counterfeit bills and certifying security paper by using a small amount of ink that can be used with confidence that can be produced from easily obtained chemical substances, and an ink therefor.

[0004]

According to the present invention, ink is attached to a bill or security paper in order to detect counterfeit bills or to authenticate security paper, and then wait for a required time.
The color change of the inked part can be observed and visually checked, and the problem can be solved by distinguishing the genuine product from the false product.

In the case of a genuine bill, the color before applying ink is the same as the color after the required time has passed, but if it is a counterfeit, the color before applying ink and the color after the required time has passed are different. After the required time, the parts to which the ink is applied turn black, so that they can be distinguished from each other.

Since banknotes have been conceived and used, the problem of counterfeit bills has not only violated the economic activity of the nation, but also caused the import and export between the nations, for the government agencies around the world who issue the banknotes. It has been a problem for government officials as a problem related to credit. In addition, the exchange of security papers describing private rights and obligations is indispensable in economic activities and social life, and counterfeiting them is a serious social problem as it disturbs the public interest order of society and the peace of business. Thus, the problem of counterfeiting is a big problem to be solved for security paper as well as paper money.

[0007] The security paper is a document or a paper used for it which describes private rights and obligations of valuable property. Typical examples where this paper is used are checks, travelers checks, money orders, bank bills, bearer notes, bonds, stock certificates, stamps, postal money orders, identification cards, registration certificates, various government agencies. Issuance diploma, certificates such as driver's license, licenses and permits, election ballots, bankbooks, passports, lottery tickets, entrance tickets, travel tickets, receipts, coupons, vouchers, bills of lading, banks Tickets, credit cards, bank cards, signature fields of ID cards, etc. can be mentioned.

What is most required to detect and authenticate the authenticity of these banknotes and security papers is, for example,
Banks, post offices, airline tellers, sports facilities,
He is a direct salesperson in the ticket offices such as theaters and ticket collectors, and also in the general retail business. For such a person, a large device, an expensive device, and a troublesome operation are not suitable for easily detecting and authenticating the authenticity of banknotes or security paper.

With respect to paper money and security paper, it has become more difficult to distinguish between genuine and counterfeit paper due to the development of copying, printing and electronic copying technology.
As the counterfeit bill problem becomes a more social issue and more secure transactions for security papers are required, special invisible agents are detected along with devices, devices, machines, etc. that detect counterfeit bills and authenticate security papers. Methods have been devised in which paper is included in paper or printed, and these are detected and detected by light such as an ultraviolet lamp or a black light or magnetism. However, many of these devices and systems are also uncertain, mechanically expensive, and in some cases the devices are bulky and often complex in design. Therefore, there has been a demand for the development of a method for detecting counterfeit bills and counterfeit / counterfeit security paper by a quick and simple method.

It is well known that starch is used as a sizing agent in the production of paper. In addition, as a method for quantitatively evaluating the amount of starch as a composition in paper, it can be achieved by treating the paper with an iodine-potassium iodide solution to produce a blue color, James P. Casey “Pu
lp and Paper Chemistry and Chemical Technology ”3r
d. vol.3, 1894pp (1981). However, the quantitative qualitative analysis of the amount of starch in banknotes uses the iodine-starch reaction with an iodine-potassium iodide solution, and even if the banknotes do not contain starch or contain starch, only trace amounts are chemically contained. There is no description about whether or not. The present inventor performed quantitative detection of the amount of starch in the banknote on the banknote by an iodine-starch reaction using an iodine-potassium iodide solution, Japan, the United States,
We found that the banknotes of Singapore, China and Australia contained almost no starch. It was also found that the paper used in the checkbook of the Ministry of Posts and Telecommunications, the stamps, and the paper used in the entry field on the back of the driver's license issued by the Public Safety Commission do not contain starch. On the other hand, commercially available general paper, such as copy paper, bond paper,
It was also found that a large amount of starch is contained in any paper such as form paper, imitation paper, drawing paper, and notepaper. Furthermore, we confirmed the presence of starch in various stock certificates and checkbooks issued by city banks.Many of these security papers contained starch, and all of the above security papers contained starch. I also found that I couldn't say it wasn't. Some security papers contain starch even if they are genuine, but the ink of the present invention is effective for security papers that do not contain starch, which has higher security. It is obvious that whether or not the effect of the present invention can be utilized as security paper can be easily and quickly confirmed by actually applying the ink of the present invention to the paper.

Based on these facts, the present inventor has completed the present invention as a method for confirming the authenticity of paper money and paper requiring security.

The basic principle of the present invention is to detect the authenticity of a bill by detecting the starch in the bill. Up to now, many chemical reactions showing color development, discoloration, or decolorization are known. Among the many reactions mentioned above, among the reactions to the above-mentioned starch, as a system that reflects the gist of the present invention, the materials used are inexpensive and affordable, and the detection and detection are sensitive and light to dark brown to gray blue purple. Focusing on the iodine starch reaction, which is a color change that is easy to visually recognize, that is, a change to a blackish color. The ink of the present invention is a light yellowish brown liquid, and when it is applied to paper that does not contain starch, the color of the applied site is the same as the color of the paper, and the site where the ink is applied even after the required time has passed. Does not change its color. This is because starch, which is a partner capable of forming a dark brown to gray-blue-purple complex with the ink, is not present in a genuine bill. On the other hand, when the ink of the present invention is applied to a fake bill made from easily available paper, the ink of the present invention reacts with starch to form a brown or gray-blue-purple complex, and the color of the ink-applied portion changes to blackish.

An important point for detecting the authenticity of a bill is to mark the bill. According to the laws of many countries, it is often not permissible to attach any kind of marking to bills. For this reason, the ink of the present invention needs to be erased without leaving a trace after being printed on a bill and provided for detection and authentication. The ink of the present invention also takes this point into consideration, and the fact that the composition is taken into consideration shows how excellent the present invention is. That is, as long as the bill is authentic, the ink of the present invention does not leave a trace of it even when it is attached to the bill, and
The chemical component that constitutes the composition of the ink of the present invention is a colorless substance which is physiologically and environmentally safe even after the substance and other components that can be volatilized are volatilized from the site where the ink is applied. In addition, the ink of the present invention comprises a concentration range that is physiologically and environmentally safe for the human body in its handling.

The ink of the present invention is harmless to the human body, has a low environmental load, and contributes to the social public interest and the peace of business.

The ink of the present invention comprises iodine and a suitable solvent, and is preferably a solvent selected from the group consisting of water, ketones, esters, ethers, alcohols and alkali metal iodide solutions. .

In the ink of the present invention, a good performance effect can be obtained only with water as the solvent, but alcohols such as ethanol and isopropyl alcohol, and smooth writing are secured in order to enhance the quick-drying property of the ink. It is also particularly preferable to include polyhydric alcohols such as ethylene glycol and glycerin in an amount of about 15% to about 80% by weight in order to prevent solidification due to drying of ink on felt core or felt. .

The alkali metal iodide in the ink of the present invention is preferably selected from the group consisting of sodium iodide and potassium iodide.

The composition of the ink of the present invention has a weight ratio of about
It consists of about 0.02% to about 3.2% iodine and alkali metal iodides, about 20% to about 85% water, and about 15% to about 80 alcohols. By changing the composition of the content composition variously, the ink of the present invention is discolored when it is applied to paper or counterfeit paper containing starch.
It is also possible to change variously the color density and the time required for color development.

Ketones that can be used in the ink of the present invention include acetone, methyl ethyl ketone, diethyl ketone, propyl ketone, isopropyl ketone, and the like, and esters include methyl, ethyl, and alkyl as alkyl groups.
Of monohydric alcohols such as propyl, isopropyl, butyl, isobutyl, pentyl, isopentyl, so-called amyl and polyhydric alcohols such as glycerol, ethylene glycol, propylene glycol, diethylene glycol, hexylene glycol, sorbitol, 1,3-propanediol. Formic acid, an alcohol selected from among
There are acetic acid, propionic acid, lactic acid ester and the like, and ethers include methyl, ethyl, propyl, butyl, isopropyl, isoalkyl and other alkyl alkyl ethers or dialkyl ethers consisting of alkyl groups such as ethylene glycol, propylene glycol and hexylene glycol. There are monoalkyl ethers and dialkyl ethers of dihydric alcohols such as 1,3-propanediol, diethylene glycol and triethylene glycol, and alcohols include ethanol, propanol,
Butanol, pentanol, isopropyl alcohol,
Isobutyl alcohol, so-called amyl alcohol and other monohydric alcohols, ethylene glycol, propylene glycol, hexylene glycol, dihydric alcohols such as 1,3-propanediol, diethylene glycol and triethylene glycol, trihydric alcohols such as glycerol, and There are polyhydric alcohols such as sorbitol, and the alkali metal iodide solution means at least water selected from alkali metal iodide at an appropriate concentration and / or the above-mentioned ketones, esters, ethers and alcohols. One or more solvent solutions.

In an embodiment of the present invention, ink is applied,
After the required time, the change in color at the site subjected to the test is observed. Although the time required for color change varies depending on the solvent composition of the ink, the amount of starch contained in the paper, and the paper quality surface state of the paper, when tested on banknotes or security paper, the ink of the present invention, iodine-within a few seconds to instant- A sharp coloration of the starch reaction is seen. If the paper does not contain banknotes or starch, or is chemically trace-only,
No color change occurs from colorless to light yellowish tan due to wetting of the ink on the inked part to the ink on the paper, and when the banknote is fake or paper containing starch, the color of the tested part is colorless to It changes from pale light yellow-brown to dark brown to gray-blue-purple to blackish. This blackish and sensitive color change of the iodine-starch reaction is visible even when the ink of the present invention is printed as a small amount of spots.

Such a color change coloration is due to the fact that the iodine in the ink reacts with the starch in the counterfeit paper or the starch in the paper containing starch to form a dark brown to gray-blue-purple blackish complex. On the other hand, with paper that is more secure than genuine paper money and starch,
Iodine in the ink does not react and almost no color change is observed, as it contains almost no starch or only trace amounts chemically.

In addition to using iodine and alkali metal iodides as reagents to make inks containing iodine, povidone iodine, a solution of a compound of polyvinylpyrrolidone and iodine, as a formulation containing iodine,
It was also found that it is possible to use iodine tincture, which is an iodine refinement consisting of iodine, potassium iodide, ethanol, and water. 11th Revised Japanese Pharmacopoeia Manual (1
986) Povidone iodine (PVP-I), which is a compound of polyvinylpyrrolidone and iodine, is Isodine (Meiji Seika Co., Ltd.), Neoyodin (Iwaki Pharmaceutical Co., Ltd.), Popilal (Asgen Pharmaceutical Co., Ltd.), Mast Clean ( (Iwashiro Pharmaceutical Co., Ltd.), etc., is a readily available drug, and is widely used as a disinfectant for external skin and a mouthwash. It is also stated that a commercial mouthwash (gargle) containing povidone iodine contains 70 mg of povidone iodine (7 mg of available iodine) in 1 ml as a component amount. Diluted and used as a mouthwash. In addition, it is also used as a disinfectant by using appropriate amounts of ethanol and water based on the method for producing an alcoholic beverage prescribed in the Japanese Pharmacopoeia. Iodine 5.7〜
6.3W / V% and potassium iodide 3.8-4.2W / V% and 70V / V%
Iodine tincture made from a proper amount of ethanol is used for skin disinfection of surgical sites and treatment of skin diseases caused by bacteria and fungi in the dermatological field.Add 2 to 4 drops to a glass of water,
It may be used internally as an antiemetic agent or for gargling. However, it is not yet known that formulations containing povidone iodine and tincture of iodine can be used for the purpose of detecting and identifying the authenticity of the bill or security paper of the present invention.

The present inventor describes in the Japanese Pharmacopoeia, a solution of a compound of polyvinylpyrrolidone and iodine, such as a formulation containing povidone iodine, or iodine iodine consisting of iodine, potassium iodide, ethanol and water, such as iodine tincture. The method of producing an alcoholic liquor, that is, dissolving with ethanol or a mixture of ethanol and water, and further diluting with water and a solvent selected from the group consisting of ketones, esters, ethers, and alcohols defined above, alone or in combination. Apply the ink obtained by applying it to a bill and observe the change in color of the inked part after a required time, and in the fake bill, the initial color of the inked part changes to dark brown to grayish blue-purple However, it is included in the counterfeit bill that the color of the inked part does not change with genuine bills Npun was also found that it is possible to obtain an ink that matches the purpose of the present invention for detecting an ink containing iodine.

A preparation containing povidone-iodine or tincture of iodine is diluted with a method for producing an alcoholic liquor, that is, with ethanol or a mixture of ethanol and water, or alone from the group consisting of water and ketones, esters, ethers and alcohols defined above. Alternatively, the composition of iodine and potassium iodide when diluted with a plurality of selected solvents is preferably about 0.02% to about 3.2% by weight. If the density is too low, the color density of the coloring is so thin that it is difficult to distinguish and identify, and the storage stability of the ink over time deteriorates. If the density is too high, when a genuine banknote is inked, a trace of light brown ink may be left on the paper surface for a short period of time.

As the solvent to be diluted, not only 70V / V% ethanol of the pharmacopoeia but also water alone can obtain a good performance effect, but alcohols such as isopropyl alcohol and the like in order to control the quick drying property of the ink, Polyhydric alcohols such as ethylene glycol and glycerin may be included in a weight ratio of approximately 15% to approximately 80% to ensure smooth writing and to prevent the ink from drying and solidifying on the felt core. It is particularly suitable.

The inks of the present invention can be packaged in small amounts in containers of various sizes and configurations and marked by known existing methods. For example, it can be quickly and simply used by filling it in a container for writing instruments such as a pen, a brush, and a stamp, and marking it in the same manner as a marker pen. Further, by using the inkjet type marking system, it is possible to detect and authenticate a large amount of bills and security paper. Also,
As a taste at the time of use, the ink of the present invention has
It is also possible to add an appropriate amount of a fragrance prepared from ketones, esters, ethers, and alcohols described in (Okuda Osamu, Hirokawa Shoten) to perfume.

The present invention will be described below with reference to examples.

[0028]

Example 1 Aqueous solution of 4.0 g of potassium iodide in a brown bottle 4
Add 80 g and add 2.0 g of iodine to dissolve it. Add 128 g of ethanol, 140 g of isopropyl alcohol, 100 g of diethylene glycol, and 150 g of ethylene glycol to make an ink. Pack this ink in a felt pen and
A centimeter-long mark is placed on the printing margin area of genuine banknotes, check paper, stamp and photocopy paper, and letter paper issued by the Japan Post. No change in color is observed in the printed area even after printing for 30 seconds on authentic papers of Japan, the United States, Singapore, China, Italy, and check paper and stamps issued by Japan Post. However, when printing on photocopy paper and notepaper, the printed mark instantly changes to a gray-blue violet color. Even if this ink was stored in a dark 50 ° C constant temperature bath and the same test was performed after 6 months, there was no change in the color development and discoloration performance of the ink.
With Chinese and Italian genuine bills and check paper and stamps issued by the Ministry of Posts and Telecommunications of Japan, no color change was observed in the printed area even after 30 seconds, and with photocopy paper and letter paper, the mark was printed instantly. The site changed to gray blue purple.

[0029]

Example 2 A brown bottle was charged with 100 ml of povidone iodine solution, which is a compound solution of polyvinylpyrrolidone and iodine, such as Isodine gurgle (manufactured by Meiji Seika Co., Ltd.), and 100 ml of 70V / V% ethanol, 100 ml of water, and ethylene glycol were added. Add 100 ml to make ink. This ink is packed in a felt-tip pen, and a 1 cm long mark is attached to the printing margin area of genuine banknotes, check paper, stamps and photocopy paper, and notepaper issued by the Japan Post. No change in color is observed in the printed area even after printing for 30 seconds on authentic papers of Japan, the United States, Singapore, China, Italy, and check paper and stamps issued by Japan Post. However, when printing on photocopy paper and notepaper, the printed mark instantly changes to a gray-blue violet color. Even if this ink was stored in a dark 50 ° C constant temperature tank and the same test was performed after 6 months, there was no change in the color development and discoloration performance of the ink.
Print it on genuine paper currency of the United States, Singapore, China, Italy, and check paper and stamps issued by the Ministry of Posts and Telecommunications of Japan.
No color change was observed in the printed part even after 30 seconds, and the mark part printed on the photocopy paper and the note paper instantly changed to gray blue purple.

[0030]

[Example 3] In a brown bottle, a iodine iodide tincture of iodine consisting of iodine, potassium iodide, ethanol and water was diluted with 70 V / V% ethanol to double volume, and a diluted iodo tincture such as dilute iodine tincture " Showa ”P
100 ml (manufactured by Showa Pharmaceutical Co., Ltd.) is added, and 450 ml of an aqueous solution of 5 g of potassium iodide, 75 g of ethanol, 150 g of isopropyl alcohol, and 150 g of diethylene glycol are added to form an ink. Pack this ink in a felt pen and
A centimeter-long mark is placed on the printing margin area of genuine banknotes, check paper, stamp and photocopy paper, and letter paper issued by the Japan Post. No change in color is observed in the printed area even after printing for 30 seconds on authentic papers of Japan, the United States, Singapore, China, Italy, and check paper and stamps issued by Japan Post. However, when printing on photocopy paper and notepaper, the printed mark instantly changes to a gray-blue violet color. Even if this ink was stored in a dark 50 ° C constant temperature bath and the same test was performed after 6 months, there was no change in the color development and discoloration performance of the ink.
With Chinese and Italian genuine bills and check paper and stamps issued by the Ministry of Posts and Telecommunications of Japan, no color change was observed in the printed area even after 30 seconds, and with photocopy paper and letter paper, the mark was printed instantly. The part changed to gray blue purple

[0031]

[Comparative Example] 2.8 g of iodine was placed in a brown bottle, and 20 ml of an aqueous solution of 8 g of potassium iodide was added to and dissolved therein. Add water to make 1000 ml. This ink is packed in a felt-tip pen, and a 1 cm long mark is attached to the printing margin area of genuine banknotes, check paper, stamps and photocopy paper, and notepaper issued by the Japan Post. Japan, America,
With genuine banknotes from Singapore, China and Italy, and check paper and stamps issued by the Ministry of Posts and Telecommunications of Japan, no color change is observed in the printed area even after 30 seconds from printing. However, when printing on photocopy paper and notepaper, the printed mark instantly changes to a gray-blue violet color. When this ink is stored in a dark 50 ° C constant temperature tank for one month, the color of the ink changes from brown to pale yellow, and even if the same test is performed on genuine banknotes, check paper, stamps, photocopy paper and notepaper, No color discoloration was observed.

[0032]

EFFECTS OF THE INVENTION It is reliable, does not require expensive and large devices and complicated operations, is easy to handle and inexpensive, and is quick and simple to operate. By using a small amount of ink that can be used with care, it is possible to provide a method for detecting counterfeit bills and a method for authenticating security paper, and an ink therefor.

Claims (2)

(57) [Claims] 1. A security paper using a paper money or a paper containing only trace amount of starch such that starch is not colored in an iodine starch color reaction or not containing chemically at all.
It is used for authenticity judgment of at least 1. Iodine, 2. Alkali metal iodide, 3. Water, 4. Alcoholic, 4
An ink composition containing various kinds of substances as essential components, the composition ratios of which are 0.02% to 3.2% iodine, 0.02 to 3.2% alkali metal iodide, and 20% water by weight.
% To 85%, and alcohols 15% to 80%
An ink composition for marking with a writing instrument, a stamp, or an inkjet, which comprises: 2. The ink composition according to claim 1, further comprising polyvinylpyrrolidone.