KR100952140B1 - Ink foranti-counterfeiting by using X-ray sensing material - Google Patents

Abstract

The present invention relates to a forgery and forgery X-ray (X-ray) detection ink having a special function for preventing forgery of banknotes (banknotes, checks, etc.), securities, identification cards, confidential documents that require security.

Specifically, the X-ray scanner includes an X-ray material to enable detection and an invisible fluorescent substance to enable authenticity identification with an ultraviolet light source. The banknotes (banknotes, checks, etc.), securities, identification cards, The present invention relates to an ink which identifies forgery and alteration of a confidential document requiring security, and can prevent forgery and alteration by a color output device (copier, printer).

X-ray material, ink, invisible fluorescent substance, anti-falsification,

Description

Ink foranti-counterfeiting by using X-ray sensing material}

The present invention relates to a forgery and forgery X-ray (X-ray) detection ink having a special function for preventing forgery of banknotes (banknotes, checks, etc.), securities, identification cards, confidential documents that require security.

Conventionally, various special functional elements have been used to prevent forgery of banknotes, securities, identification cards, and secret documents that require security.However, banknotes, securities, identification cards, secret documents, etc. It is difficult for an expert to identify the authenticity by copying forging using a printer, printer, etc.).

Various methods have been researched and developed to prevent such forgery. For example, a pattern other than latent images and latent images such as " invalid " Printing by dividing the print into large dots and small dots, and using the difference in the shade between them to reproduce the large dots in copying, but the small dot disappears, or regular optical interference pattern by lines Optical interference technology that distinguishes printed materials and copies due to the appearance of wave pattern caused by optical interference, such as flat latent image and optical interference technology, which is a copy tamper proofing technology, is applied to banknotes, securities, identification cards, secret documents, etc. It is used as a measure to prevent forgery and alteration.

In addition, in the related art, a technology related to an ink having various functions for preventing forgery and alteration has been provided by the present applicant as follows.

An ultraviolet reflective intaglio ink composition of Korean Patent No. 344078 and a method of using the same are directed to an ultraviolet reflective intaglio ink including an ultraviolet reflective blue pigment and / or a green pigment made of a mixture of metal oxides. By checking the authenticity and to prevent forgery.

The oxidative color changing ink of Korean Patent No. 407253 and a method of using the same are related to an oxidative color changing ink which is intended to include an oxidizing color pigment and an invisible fluorescent substance, and when using an ink eraser or a bleaching agent for modulation, The fluorescence effect is lost when the UV light is irradiated to the changed and modulated part, so that it can be easily confirmed by the naked eye and the device.

The special functional ink showing wavelengths of various colors of Korean Patent No. 407255 and a method of using the same are related to functional inks including phosphors and invisible absorbing materials having different fluorescence materials and emission wavelengths. Check for forgery.

In the penetrating ink composition of Korean Patent No. 506130, a color pattern having an average particle diameter of 0.1 micron or more is used to prevent a forgery so that a printing pattern printed on the front surface penetrates the printed object and appears on the back surface.

The dichroic fluorescent ink for preventing forgery and alteration using the fluorescent material of Korean Patent No. 517160 relates to a dichroic fluorescent ink containing invisible long-wave fluorescent material and invisible short-wave fluorescent material, including short-wave (254 nm) ultraviolet rays and long-wave (365 nm). ) It is to prevent the forgery and alteration by emitting different colors when irradiated with ultraviolet rays.

The various anti-falsification inks provided in the related art are mostly fluorescent inks using invisible fluorescent substances that identify forgery and alterations using infrared or ultraviolet detectors, magnetic inks, time-varying inks, and thermochromic inks using magnetic properties. Has been developed and provided.

However, since the ink for identifying the forgery using the X-ray scanner has not been developed, there is a drawback that the X-ray scanner cannot detect the forgery.

Accordingly, an object of the present invention is to provide an ink capable of detecting a forgery of a document using an X-ray searcher as described above.

That is, as an anti-leakage countermeasure for security documents, an X-ray scanner enables a detection function and an ultraviolet light source for authenticity identification, thereby providing an ink having an X-ray detection function that is easy to identify forgery and alteration.

In another object, the present invention can prevent the forgery of banknotes, securities, identification cards, special documents for security purposes and the leakage of security products manufactured using the above-described X-ray detection ink (gravure, screen). It is to provide paper.

In order to achieve the above object, the forgery-inhibition X-ray detection ink of the present invention, in the forgery-inhibition ink with added functionality to prevent the forgery, the ink composition comprises an X-ray material and / or invisible fluorescent substance, the total weight of the ink X-ray material per 35% by weight, 2 to 10% by weight of the invisible fluorescent substance.

In this way, the ink containing the X-ray material can determine whether the forgery in the X-ray detector. In addition, by the invisible fluorescent material it is possible to determine the presence of forgery in the search device using the ultraviolet light source.

X-ray detection ink containing the X-ray material and / or invisible fluorescent material, 35 to 65% by weight of the X-ray material, 2 to 6% by weight invisible fluorescent material, 23 to 36% by weight varnish, 2 to 6% by weight wax, Intaglio ink for detecting X-rays consisting of 2 to 3% by weight of aliphatic hydrocarbon solvent, 2 to 3% by weight of glycol ether solvent, 2 to 3% by weight of dispersant, and 1 to 2% by weight of drying agent, or 35 to 65% by weight of X-ray substance, barium sulfate 5-10% by weight, invisible fluorescent substance 2-6%, varnish 23-36%, wax 1-5%, aliphatic hydrocarbon solvent 1-2%, glycol ether solvent 1-2%, dispersant 1 Intaglio ink for X-ray detection, consisting of ~ 2% by weight, 1 ~ 2% by weight of the desiccant,

Or X-ray detection screen ink consisting of 40 to 65% by weight of X-ray material, 2 to 10% by weight of invisible fluorescent substance, 30 to 45% by weight of varnish, 3 to 5% by weight of cyclohexanone,

Or X-ray sensing screen ink consisting of 40 to 65% by weight of X-ray material, 6 to 10% by weight of barium sulfate, 2 to 6% by weight of invisible fluorescent substance, 25 to 40% by weight of varnish, and 2 to 4% by weight of cyclohexanone. Can be formed.

The invisible fluorescent substance is colorless in visible light, green in short wave (254 nm) ultraviolet light, and red light in long wave (365 nm) ultraviolet light.

The X-ray material is gadolinium sulfide-based or gadolinium sulfide-based and barium sulfate (Barium Sulfate) is used.

That is, the X-ray material is used by selecting any one or two or more of the gadolinium sulfide series, or the X-ray material is selected by using any one or two or more of the gadolinium sulfide series and mixed with barium sulfate (Barium Sulfate).

X-ray detection ink for forgery and alteration prevention of the present invention made as described above has the feature that can be checked forgery by the X-ray scanner when using banknotes (banknotes, checks, etc.), securities, identification, secret documents that require security.

In addition, it has a feature that can determine whether the forgery in the searcher using ultraviolet light by the invisible fluorescent material.

In addition, X-ray materials and invisible fluorescent materials are included, so that if the X-ray screening device and the UV-based screening device are checked for forgery and alteration, it is possible to check whether the forgery is more reliable. , Forgery, identity documents, and confidential documents that require security.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms or words used in the specification and claims should not be construed as having a conventional or dictionary meaning, and the inventors should properly explain the concept of terms in order to best explain their own invention. Based on the principle that can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention.

Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiment of the present invention and do not represent all of the technical idea of the present invention, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations.

Forgery and forgery X-ray detection ink of the present invention, the x-ray material is added to the search for forgery in the X-ray searcher. Alternatively, the x-ray material and the invisible fluorescent substance are added to search by the x-ray detector and the ultraviolet detector.

The forgery and alteration prevention X-ray detection ink contains 35 to 65% by weight of the X-ray material, 2 to 10% by weight of the invisible fluorescent substance per weight% of the ink.

X-ray materials added to the anti-falsification X-ray detection ink to be searched by the X-ray scanner are usually gadolinium sulfide-based (Lumilux Green RGS, CWR C 180 R, CD 105, CD 106, Phosphor, manufactured by Honeywell, UKL- 63, UKL-65D, etc.), Barium Sulfate is used, but not limited to,

Invisible fluorescent materials that are searched by the UV detector are colorless in visible light, green in short wave (254 nm) ultraviolet light, and red in long wave (365 nm) ultraviolet light (Lumilux CD manufactured by Honeywell). 105, CD 106, etc.).

The gadolinium sulfide series is usually selected one can be used alone, but barium sulfate (Barium Sulfate) is usually used in combination with the gadolinium sulfide series due to the insufficient X-ray effect.

In addition, among the gadolinium sulfide series, Honeywell's Lumilux CD 105 and CD 106 are X-ray materials and invisible fluorescent materials, and when the Lumilux CD 105 and CD 106 are used alone, the X-ray effect is insufficient to be used. Therefore, Lumilux CD 105 or CD 106 can be mixed with Green RGS to provide X-ray detection and invisible fluorescence.

That is, the forgery and alteration prevention X-ray detection ink,

In the first embodiment, 35 to 65% by weight of the X-ray material (Lumilux Green RGS), 2 to 6% by weight of the invisible fluorescent material (Lumilux CD 105), 23 to 36% by weight of water-insoluble varnish, 2 to 6% by weight of wax X-ray sensing intaglio ink formed with a composition ratio of 2 to 3% by weight of an aliphatic hydrocarbon solvent, 2 to 3% by weight of a glycol ether solvent, 2 to 3% by weight of a dispersant, and 2 to 3% by weight of a desiccant,

In a second embodiment, 35 to 65% by weight of X-ray material (Lumilux Green RGS), 5 to 10% by weight of barium sulfate, 2 to 6% by weight of invisible fluorescent substance, 23 to 36% by weight of water-insoluble varnish, 1 to 5 wax X-ray sensing intaglio ink formed by the composition ratio of wt%, aliphatic hydrocarbon solvent 1-2 wt%, glycol ether solvent 1-2 wt%, dispersant 1-2 wt%, desiccant 1-2 wt%,

In a third embodiment, the X-ray screen ink for X-ray sensing formed with a composition ratio of 40 to 65% by weight of X-ray material, 2 to 10% by weight of invisible fluorescent substance, 30 to 45% by weight of varnish, and 3 to 5% by weight of cyclohexanone,

In a fourth aspect, the composition ratio of 40 to 65% by weight of X-ray material, 6 to 10% by weight of barium sulfate, 2 to 6% by weight of invisible fluorescent substance, 25 to 40% by weight of varnish, and 2 to 4% by weight of cyclohexanone There is a screen ink for detecting x-rays.

In these aspects, the anti-counterfeiting X-ray detecting ink of the present invention is black as shown in FIG. 2, where the anti-counterfeiting X-ray detecting ink is used in an X-ray scanner (Rapiscan 519, 520, 620XR, etc.). It can be seen with the naked eye on the monitor, and when it is irradiated with UV light, green color appears at short wave (254nm) as shown in FIG. 4A, and red color is emitted at long wave (365nm) as shown in FIG. Can be identified.

In addition, the anti-counterfeit X-ray detection ink does not show the X-ray detection function at the time of copying by the output device (copy machine, printer), which is a computer peripheral device, and prevents the leakage of security documents because the specific color does not emit when irradiated with ultraviolet light. Or, authenticity can be easily identified by the device.

That is, the X-ray material as a functional material used herein is gadolinium sulfide series (Lumilux Green RGS, CWR C 180 R, Honey 105, CD 105, CD 106, UKL-63, UKL-65D, etc.), barium sulfate (Barium Sulfate) and optionally invisible fluorescent material (Lumilux CD 105, CD 106, etc., manufactured by Honeywell) refers to a material that is changed from colorless to colored in x-ray or ultraviolet light.

On the other hand, X-ray sensing ink should be selectively used according to the use. In other words, when using non-fluorescent papers such as banknotes and securities, X-ray detection ink with fluorescence function should be selected. On the other hand, secret documents for security purposes use plain white paper and fluorescent whitening agent is applied to the paper itself. The fluorescence effect is insufficient even if the fluorescence function is added to the X-ray sensing ink, and thus it should be selectively selected.

The X-ray material Lumilux Green RGS and the invisible fluorescent material Lumilux 105 has the following functions depending on the mixing ratio.

If the X-ray material Lumilux Green RGS is used at less than 30% by weight in order to manufacture intaglio ink and screen ink, there is a problem of insufficient effect of X-ray sensitization. And poor screen printability.

In addition, 2-10% by weight of the invisible fluorescent material Lumilux CD 105 and X-ray material Lumilux Green RGS 40-65% by weight should be applied to emit green light in the short wave (254nm) of ultraviolet light, and in the long wave (365nm) It is characterized by red light emitting. When the X-ray ink prepared by the X-ray material and the invisible fluorescent substance added in this way is applied to banknotes, securities, identification cards, security documents, etc. in a specific pattern as shown by reference numeral A of FIG. A specific pattern appears to confirm whether a security product is leaked, and when copying by a color output device (copier, printer), a specific color does not emit from long and short wavelengths, which is ultraviolet light, thereby preventing visible and device forgery in advance. .

1 is a process flow chart showing a method of manufacturing an anti-counterfeiting X-ray ink according to the present invention, Figure 2 is shown in a pattern when applying the X-ray (X-ray) detection ink to a specific portion of the security product 3 is a state diagram showing the X-ray sensing ink when passing through the X-ray detector in FIG. 2, and FIG. 4 is an ultraviolet ray applied to the X-ray sensing ink application site in FIG. 2. 4A is a view showing light irradiation, and FIG. 4A shows light emission in green color when irradiated with ultraviolet short wave (254 nm), and FIG. 4B is state diagram showing light emission in red light when irradiated with ultraviolet long wave (365 nm).

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

Example  One

Intaglio ink for X-ray detection.

division Mixing ratio 1 (wt%) Mixing ratio 2 (wt%) Irregular varnish 30 30 X-ray material 60 59 Invisible fluorescent substance 3 3 Wax One 2 Aliphatic Hydrocarbon Solvent 2 2 Glycol ether solvent 2 2 Dispersant One One drier One One system 100 100

In the same manner as in Example 1 and mixed in a three-roll mill (3 Roll Mill) 5 to 6 times the dispersion was prepared intaglio for X-ray sensing.

The physical properties of the ink thus prepared are as follows.

* Tack (Tack, 40 ℃, 50m / min): 85 ~ 120 tack

* Viscosity: 6.0 ~ 9.5 Pas

* Drying time: 9-12 hours

The security product which applied the intaglio ink for detecting X-rays manufactured above using a intaglio printing machine on banknotes, securities, security papers for security purposes, as shown by reference numeral A of FIG. It was possible to check whether leakage occurred. When copying by a color output device (copier, printer), the specific color did not emit in the long and short wave, which is ultraviolet light, so that the visible and the forgery by the device could be easily confirmed.

Example  2

Intaglio ink for X-ray detection.

division Mixing ratio 1 (wt%) Mixing ratio 2 (wt%) Irregular varnish 30 30 X-ray material 55 56 Barium sulfate 5 4 Invisible fluorescent substance 2 2 Wax 2 2 Aliphatic Hydrocarbon Solvent 2 2 Glycol ether solvent 2 2 Dispersant One One drier One One system 100 100

Mixing as described above was dispersed and ground 5 to 6 times in a three roll mill (3 Roll Mill) to prepare an intaglio ink for X-ray detection.

The physical properties of the ink thus prepared are as follows.

* Tack (Tack, 40 ℃, 50m / min): 85 ~ 120 tack

* Viscosity: 6.0 ~ 9.5 Pas

* Drying time: 9-12 hours

The security product which applied the intaglio ink for detecting X-rays manufactured above using intaglio printing machines on banknotes, securities, security papers for security purposes, as shown by reference numeral A of FIG. It was possible to check whether leakage occurred. When copying by a color output device (copier, printer), the specific color did not emit in the long and short wave, which is ultraviolet light, so that the visible and the forgery by the device could be easily confirmed.

Example  3

X-ray screen ink.

Configuration Mixing ratio 1 (wt%) Mixing ratio 2 (wt%) Screen varnish 34 34 X-ray material 60 61 Invisible fluorescent substance 3 2 Cyclohexanone 3 3 system 100 100

Mixing as described above, the dispersion was stirred for about 30 minutes (RPM: 2000 times / min) with a high speed stirrer to prepare an X-ray detection screen ink.

The physical properties of the ink thus prepared are as follows.

* Viscosity (second): 8-12 (viscosity measurement was measured with Viscospatula at 23 ° C.)

* Drying time: 3 minutes at 60 ~ 70 ℃

The security product applied to the screen ink for X-ray detection manufactured in the above, such as banknotes, securities, identification cards, security papers for security purposes as shown by reference numeral A of FIG. 4, has a specific pattern when passing through the X-ray scanner. It was possible to check whether the security product leaked out. When copying by color output device (copy machine, printer machine), specific color did not emit in the long and short wave which is ultraviolet light.

Example  4

X-ray screen ink.

Configuration Mixing ratio 1 (wt%) Mixing ratio 2 (wt%) Screen varnish 33 31 X-ray material 55 56 Barium sulfate 5 7 Invisible fluorescent substance 3 3 Cyclohexanone 4 3 system 100 100

Mixing as described above, the dispersion was stirred for about 30 minutes (RPM: 2000 times / min) with a high speed stirrer to prepare an X-ray detection screen ink.

The physical properties of the ink thus prepared are as follows.

* Viscosity (second): 8-12 (viscosity measurement was measured with Viscospatula at 23 ° C.)

* Drying time: 3 minutes at 60 ~ 70 ℃

The security product applied to the functional screen ink for detecting X-rays, which is manufactured as described above using a screen printing method on banknotes, securities, identification cards, security papers for security purposes, and the like as shown by reference numeral A of FIG. When it appeared, it was possible to check whether a security product leaked out. When copying by a color output device (copier, printer), a specific color did not emit in the long and short wave, which is ultraviolet light, so that the visible and the forgery by the device could be easily confirmed.

1 is a manufacturing process of the anti-counterfeiting X-ray (X-ray) detection ink according to the present invention.

Figure 2 is a state diagram showing a pattern when applying the X-ray (X-ray) detection ink to a specific part of the security product.

FIG. 3 is a state diagram showing the X-ray detecting ink when passing through the X-ray detector of FIG. 2. FIG.

FIG. 4 is a diagram showing an X-ray sensing ink applied part when irradiated with ultraviolet light, and FIG. 4A shows that the green light is emitted when irradiated with ultraviolet short waves (254 nm), and FIG. 4B is an ultraviolet long wave 365. (nm) State diagram showing light emission in red color upon irradiation.

Claims (7)

In the forgery preventing ink which added the functionality to prevent forgery, The ink is forgery and tamper-resistant X-ray detection ink that is searched by an X-ray detector, including the X-ray material used to select any one or two or more of the gadolinium sulfide series. In the forgery preventing ink which added the functionality to prevent forgery, The ink is searched by an X-ray detector and an ultraviolet detector including an X-ray material and an invisible fluorescent substance, The x-ray material is forgery and tamper-resistant x-ray detection ink, characterized in that for selecting any one or two or more of the gadolinium sulfide series. In the forgery preventing ink which added the functionality to prevent forgery, The ink is searched by an X-ray detector and an ultraviolet detector including an X-ray material and an invisible fluorescent substance, The invisible fluorescent substance is colorless in visible light, green in short wave (254 nm) ultraviolet light, red light in the long wave (365 nm) ultraviolet light for preventing forgery and forgery, characterized in that the. The method according to claim 2 or 3, X-ray material for tamper resistant X-ray detection ink contained in 35 to 65% by weight of the total weight of the ink, 2 to 10% by weight of the invisible fluorescent material. The method of claim 1, X-ray detection ink for tamper resistant X-rays per 35% by weight of the total ink contained. The method of claim 2, The invisible fluorescent substance is colorless in visible light, green in short wave (254 nm) ultraviolet light, red light in the long wave (365 nm) ultraviolet light for preventing forgery and forgery, characterized in that the. The method according to claim 1 or 2, The x-ray material is tamper-resistant x-ray detection ink, characterized in that used in combination with barium sulfate (Barium Sulfate).

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