Add a special material in the ink to distinguish it from ordinary printing ink and achieve a special ink for anti-counterfeiting purposes. The ink used to print anti-counterfeit printed products must be specially developed. Its formula and process are confidential and should be strictly managed. The products should also be fixed and quantitatively supplied to the designated manufacturers, set up special machines for use, and prevent proliferation. .
Anti-counterfeiting inks are generally classified into fluorescent inks, infrared inks, photochromic inks, thermochromic inks, and copy-proof inks, depending on the difference between the additive substances and the detection method.
1î€UV excitation fluorescence anti-counterfeiting ink. According to whether the color of ink is divided into colored fluorescent ink, colorless fluorescent ink two. The former is to add a fluorescent compound to a colored ink, and the latter to a colorless ink; the printed graphic is visible to the naked eye and the latter is invisible. Both require the printed product to be exposed to ultraviolet light to show fluorescence. In the ultraviolet (200 ~ 400 nm) irradiation, can emit visible light (400 ~ 800 nm) of the ink, but also a long wave and short wave of the points. Excited wavelength of 254 nanometers called short-wave ultraviolet excitation fluorescent ink, excitation wavelength of 365 nanometers is called long-wave ultraviolet excitation fluorescent ink, the latter application more.
The quality of the fluorescent ink depends mainly on the properties of the fluorescent material. At present, more rare earth organic complexes, fluorescent pigments and fluorescent resins are used.
With good fluorescent materials, good equipment, techniques, and processes must be available to produce high quality fluorescent inks. Due to the fact that the manufacturing technology is not sufficient and the product quality is not up to standard, the quality of the fluorescent ink on the domestic market is uneven, some are unstable, and the fluorescence is quickly attenuated and cannot be applied. Therefore, care should be taken when purchasing the product.
2 î€ optical color ink. A tiny multi-layer coating is added to the ink, and the printed pattern shows different colors when viewed from different angles. It is called an optical conversion ink. Because of the different optical properties of each layer, the color of the ink is different from the color of the original. It is reported that a company in Switzerland exclusively produces color-changing inks that have been used in currency and passports in dozens of countries. The new version of the hundred-dollar bill also uses this type of ink. The word "100" in the lower right corner of the face of the ticket is considered green and black from other angles. The new Japanese yen banknotes with 10,000, 5,000, and 1,000 denominations in 1984 also adopted this technology.
3î€Infrared security ink. Infrared-absorbing material is added to the ink. Since infrared ink absorbs infrared light, if infrared ink is applied to a certain part of the ticket, no reflection occurs under ordinary light, and corresponding signals or dark images may be observed under the infrared detector.
4 hot change color security ink. An ink that changes color when heated. The principle is to change the physical properties or chemical structure of the filler (liquid crystals or other thermochromic compounds) after heating and change color. Thermochromism is reversible and irreversible. There are many substances that are thermally induced discolored, but suitable for anti-counterfeiting applications should have high sensitivity, good stability, and suitable temperature for discoloration, generally between 40°C and 100°C. Some of the tests were done with finger temperature heating, some burning with a burning cigarette or warming with a hot water cup. When the product is bottled liquid, such as wine, the thermochromic logo is not easy to heat, so someone has designed to add a heat-insulating enclosed space under the logo to ensure that the heat-induced discoloration is not affected.
5î€ photochromic security ink. Add photochromic or light-activated compounds to the ink. An image printed with this ink shows a color under white light, and when it is shot with ultraviolet light, it becomes another color, usually red, blue, or yellow. Some of them revert back to their original colors when illuminated with white light. The process is reversible.
6 magnetic anti-counterfeiting ink. Ink is made of magnetic material. With this ink printed pattern or logo, magnetic signals can be detected with a magnetic detector. With its printed password and other information, it can be read by the decoder.
Because magnetic materials are easily available, magnetic inks printed on the products are susceptible to external friction and other effects and magnetic properties are reduced or even lost, affecting its anti-counterfeiting effect. It has been reported that anti-counterfeiting inks that have been developed after being excited by electromagnetic waves have been successfully developed in China.
Japan uses magnetic ink to print yen, but where and how much ink is used is absolutely confidential. The experts examined the Japanese yen banknotes with a denomination of 10,000 yuan. Magnetic ink is located in the upper right corner of 6î€25cm2. The ink can detect as many as 14 elements, of which the magnetic metals are iron, cobalt, nickel. The highest iron content is found in cobalt and nickel. The main components of magnetic inks are iron oxide and cobalt oxide. The magnetic field strength of paper is 1 î€ 2 Gauss, which is an order of magnitude higher than that of geomagnetism.
7 wipe color security ink. The ink is made by adding special chemical reagents or microcapsules containing a color changing substance. Colored or invisible graphics printed with this ink, when rubbed or pressed with nails, hard objects or tools, the color change (red, blue, black, green, purple, yellow, etc.) is issued. The color of the display can be selected according to the user's requirements and the design is memorized. After the color is not faded, the product is enabled and cannot be pasted on the imitation. Some of these products have the name "a highlight".
8 anti-printing ink. A special compound is added to the formula of the ink, and this ink will react with color when it meets the eradicator or other correction fluid. The cheques, vouchers, etc. printed with this ink will change color or appear to be "wasteable" in the event that the correction fluid such as the eradicating spirit disappears.
9 inch chemical encryption security ink. Special chemical reagents or other substances are added to the ink formulation to print invisible images that are not visible to the naked eye. When the corresponding reagents are applied within a defined range, the hidden images or fluorescent light are immediately displayed.
10 inch multiple encryption security ink. The above-mentioned several kinds of anti-counterfeiting methods are used in an ink to make its anti-counterfeiting performance better.
11 î€ Anti-counterfeiting ink and ink pad. Sealed ink and ink pad are also a set of inks, so their anti-counterfeiting methods can be modeled on the above. In addition, the use of ultraviolet, infrared, X-ray and other invisible fluorescent compounds, photoelectric conversion materials, special chemical reagents, animal and plant DNA, monoclonal antibodies or specific antigens and other substances to produce a new type of security ink is also under study.
The seals stamped with the above-mentioned ink or ink paste have a different appearance from ordinary seals, but they have special effects when detected by the corresponding methods. If ultraviolet ray excites fluorescence anti-counterfeiting ink, bright fluorescence appears in the corresponding wavelength of ultraviolet radiation.
Anti-counterfeiting inks are generally classified into fluorescent inks, infrared inks, photochromic inks, thermochromic inks, and copy-proof inks, depending on the difference between the additive substances and the detection method.
1î€UV excitation fluorescence anti-counterfeiting ink. According to whether the color of ink is divided into colored fluorescent ink, colorless fluorescent ink two. The former is to add a fluorescent compound to a colored ink, and the latter to a colorless ink; the printed graphic is visible to the naked eye and the latter is invisible. Both require the printed product to be exposed to ultraviolet light to show fluorescence. In the ultraviolet (200 ~ 400 nm) irradiation, can emit visible light (400 ~ 800 nm) of the ink, but also a long wave and short wave of the points. Excited wavelength of 254 nanometers called short-wave ultraviolet excitation fluorescent ink, excitation wavelength of 365 nanometers is called long-wave ultraviolet excitation fluorescent ink, the latter application more.
The quality of the fluorescent ink depends mainly on the properties of the fluorescent material. At present, more rare earth organic complexes, fluorescent pigments and fluorescent resins are used.
With good fluorescent materials, good equipment, techniques, and processes must be available to produce high quality fluorescent inks. Due to the fact that the manufacturing technology is not sufficient and the product quality is not up to standard, the quality of the fluorescent ink on the domestic market is uneven, some are unstable, and the fluorescence is quickly attenuated and cannot be applied. Therefore, care should be taken when purchasing the product.
2 î€ optical color ink. A tiny multi-layer coating is added to the ink, and the printed pattern shows different colors when viewed from different angles. It is called an optical conversion ink. Because of the different optical properties of each layer, the color of the ink is different from the color of the original. It is reported that a company in Switzerland exclusively produces color-changing inks that have been used in currency and passports in dozens of countries. The new version of the hundred-dollar bill also uses this type of ink. The word "100" in the lower right corner of the face of the ticket is considered green and black from other angles. The new Japanese yen banknotes with 10,000, 5,000, and 1,000 denominations in 1984 also adopted this technology.
3î€Infrared security ink. Infrared-absorbing material is added to the ink. Since infrared ink absorbs infrared light, if infrared ink is applied to a certain part of the ticket, no reflection occurs under ordinary light, and corresponding signals or dark images may be observed under the infrared detector.
4 hot change color security ink. An ink that changes color when heated. The principle is to change the physical properties or chemical structure of the filler (liquid crystals or other thermochromic compounds) after heating and change color. Thermochromism is reversible and irreversible. There are many substances that are thermally induced discolored, but suitable for anti-counterfeiting applications should have high sensitivity, good stability, and suitable temperature for discoloration, generally between 40°C and 100°C. Some of the tests were done with finger temperature heating, some burning with a burning cigarette or warming with a hot water cup. When the product is bottled liquid, such as wine, the thermochromic logo is not easy to heat, so someone has designed to add a heat-insulating enclosed space under the logo to ensure that the heat-induced discoloration is not affected.
5î€ photochromic security ink. Add photochromic or light-activated compounds to the ink. An image printed with this ink shows a color under white light, and when it is shot with ultraviolet light, it becomes another color, usually red, blue, or yellow. Some of them revert back to their original colors when illuminated with white light. The process is reversible.
6 magnetic anti-counterfeiting ink. Ink is made of magnetic material. With this ink printed pattern or logo, magnetic signals can be detected with a magnetic detector. With its printed password and other information, it can be read by the decoder.
Because magnetic materials are easily available, magnetic inks printed on the products are susceptible to external friction and other effects and magnetic properties are reduced or even lost, affecting its anti-counterfeiting effect. It has been reported that anti-counterfeiting inks that have been developed after being excited by electromagnetic waves have been successfully developed in China.
Japan uses magnetic ink to print yen, but where and how much ink is used is absolutely confidential. The experts examined the Japanese yen banknotes with a denomination of 10,000 yuan. Magnetic ink is located in the upper right corner of 6î€25cm2. The ink can detect as many as 14 elements, of which the magnetic metals are iron, cobalt, nickel. The highest iron content is found in cobalt and nickel. The main components of magnetic inks are iron oxide and cobalt oxide. The magnetic field strength of paper is 1 î€ 2 Gauss, which is an order of magnitude higher than that of geomagnetism.
7 wipe color security ink. The ink is made by adding special chemical reagents or microcapsules containing a color changing substance. Colored or invisible graphics printed with this ink, when rubbed or pressed with nails, hard objects or tools, the color change (red, blue, black, green, purple, yellow, etc.) is issued. The color of the display can be selected according to the user's requirements and the design is memorized. After the color is not faded, the product is enabled and cannot be pasted on the imitation. Some of these products have the name "a highlight".
8 anti-printing ink. A special compound is added to the formula of the ink, and this ink will react with color when it meets the eradicator or other correction fluid. The cheques, vouchers, etc. printed with this ink will change color or appear to be "wasteable" in the event that the correction fluid such as the eradicating spirit disappears.
9 inch chemical encryption security ink. Special chemical reagents or other substances are added to the ink formulation to print invisible images that are not visible to the naked eye. When the corresponding reagents are applied within a defined range, the hidden images or fluorescent light are immediately displayed.
10 inch multiple encryption security ink. The above-mentioned several kinds of anti-counterfeiting methods are used in an ink to make its anti-counterfeiting performance better.
11 î€ Anti-counterfeiting ink and ink pad. Sealed ink and ink pad are also a set of inks, so their anti-counterfeiting methods can be modeled on the above. In addition, the use of ultraviolet, infrared, X-ray and other invisible fluorescent compounds, photoelectric conversion materials, special chemical reagents, animal and plant DNA, monoclonal antibodies or specific antigens and other substances to produce a new type of security ink is also under study.
The seals stamped with the above-mentioned ink or ink paste have a different appearance from ordinary seals, but they have special effects when detected by the corresponding methods. If ultraviolet ray excites fluorescence anti-counterfeiting ink, bright fluorescence appears in the corresponding wavelength of ultraviolet radiation.
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