Anti-counterfeiting ink, ink with anti-counterfeiting performance. Anti-counterfeiting ink is an extremely important field of anti-counterfeiting technology, with a wide range of applications and involving many disciplines. It is a special ink with anti-counterfeiting function which is specially developed by adding some special substances to the ink, which is used to print anti-counterfeiting printing products. Its formulas and processes are confidential and should be strictly managed; its products should also be supplied to designated manufacturers on a regular basis and at regular intervals, with dedicated personnel to set up the machine to prevent proliferation.
1) Photosensitive anti-counterfeiting ink
Ink that emits visible light when exposed to light. The light here refers to visible and invisible light such as ultraviolet light, infrared light, and sunlight.
a. Ultraviolet fluorescent ink: ink that can emit visible light (400-800nm) under ultraviolet light (200-400nm). Usually refers to short-wave ultraviolet excitation of visible fluorescent anti-counterfeiting printing ink, excitation wavelength is 254nm, long-wave ultraviolet excitation of visible fluorescent anti-counterfeiting printing ink, excitation wavelength is 365nm.
b. Sunlight-induced color-changing ink: Anti-counterfeiting printing ink that can emit visible light 400-800nm ​​under the sunlight. From the application point of view, this ink is discolored due to the effect of sunlight, and it is also discolored by ultraviolet irradiation.
C. Infrared anti-counterfeiting ink: it uses infrared (700-1500nm) with different absorption characteristics to match an ink made, and can detect or identify its imprint through the instrument. A pair of substances with different absorption characteristics for infrared rays are added to the ink. Products printed with infrared ink have no reaction under ordinary light, and under infrared light detection, corresponding signals or graphics can be observed.
2) Thermal sensitive anti-counterfeiting ink
Under the action of heat, the ink can produce color change effect. It is usually divided into reversible and irreversible thermal discoloration anti-counterfeiting inks; usually the discoloration temperature is 34-100 degrees Celsius. Hand temperature discoloration anti-counterfeiting ink is a kind of thermal discoloration anti-counterfeiting ink, which refers to the ink that can produce color change effect under the temperature of 34-36 degrees Celsius. The principle of thermochromism is to cause a physical or chemical change of a color-changing compound to bring its own absorbance change under heating.
3) Pressure sensitive anti-counterfeiting ink
Under the pressure friction, color ink can appear. It is made by adding special chemical reagents or color-changing substances to the ink. Colored or invisible graphics printed with this ink, when rubbed or pressed with a hard object or tool, chemical pressure discoloration or microcapsule rupture occurs and the dye leaks and the color (red, blue, ink, Green, purple, yellow, etc.). According to the user's requirements, select the color of the display and design the dark memory.
4) Magnetic security ink
Anti-counterfeit printing ink made with magnetic powder material as a functional component. It is the most commonly used anti-counterfeiting ink, and its outstanding features are dark color appearance and simple detection instruments, which are mostly used in ticket anti-counterfeiting.
5) Optically variable security ink
It is made of multi-layer optical film flake powder capable of optical interference as a dispersing material. The ink is completely different in color when the incident angle of light is 90 degrees Celsius and 30 degrees Celsius. This technology is extremely complex and expensive, and few countries can produce it. It has been used on foreign banknotes.
6) Anti-tampering and anti-counterfeiting ink
Ink that has a color-developing chemical reaction to the chemical substance used for correction.
2. Application
Common types include anti-counterfeiting phosphors, temperature color-changing powders, anti-counterfeiting fluorescent long and short fibers, ultraviolet anti-counterfeiting fluorescent inks, infrared anti-counterfeiting fluorescent inks, anti-counterfeiting thermal inks, heating and color changing inks, etc. (Such as photochromic inks that change color in sunlight and ultraviolet light, and thermochromic inks that can change color at different temperatures.) These anti-counterfeiting products can be widely used in tobacco and alcohol, food, printing, papermaking, textile, famous clothing labels In other fields, it has a unique anti-counterfeiting effect.
3. Technical description
UV phosphor: red, yellow, green
Temperature change materials: colorless to colorless reversible (blue, red, black), colorless to colored reversible (red, green)
Fluorescent anti-counterfeiting ink: fluorescent red, fluorescent yellow, fluorescent blue, fluorescent green, red to fluorescent red, red to fluorescent yellow
Temperature change reversible anti-counterfeiting ink: (pink, blue, black, orange) colored → colorless → colored, (pink, green) colorless → colored → colorless
Temperature and color change: The temperature and color change series can change the color when the temperature changes. The color change temperature can be adjusted in advance, and the color combination can be adjusted in advance. As long as you imagine the new products will endlessly.
Photosensitive color change: Imagine how wonderful the colorful color changing clothes appear in the light changing environment. Indoor and outdoor, cloudy, sunny, clothing, etc. have different colors.
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