The anti-counterfeiting ink is an ink that changes under special conditions. It is used to print visible or invisible signs, which is easy to verify and prevent forgery. With the continuous progress of science and technology, our ink technology is more and more advanced, with a wide range of uses and varieties. Let's take a look at the types and characteristics of anti-counterfeiting inks.
Photosensitive anti-counterfeiting ink
Ink that emits visible light under light. The light here refers to visible and invisible light such as ultraviolet light, infrared light and sunlight.
1. UV fluorescent ink
Ink that can emit visible light (400-800nm) under ultraviolet light (200-400nm). It usually refers to the visible fluorescent anti-counterfeiting printing ink excited by short wave ultraviolet with an excitation wavelength of 254 nm, and the visible fluorescent anti-counterfeiting printing ink excited by long wave ultraviolet with an excitation wavelength of 365 nm.
2. Sunlight excited color changing ink
It is an anti-counterfeiting printing ink that can emit visible light of 400-800nm under sunlight. From the application point of view, this ink changes color due to the action of sunlight. In essence, it changes color due to ultraviolet radiation.
3. Infrared anti-counterfeiting ink
An ink made by matching different absorption characteristics of infrared (700-1500nm), and its mark can be detected or recognized by instrument. It is made by adding substances with different infrared absorption characteristics into the ink. Products printed with infrared ink have no reaction under ordinary light, but corresponding signals or graphics can be observed under infrared light detection.
Heat sensitive anti-counterfeiting ink
An ink that can change color under the action of heat. It is usually divided into reversible and irreversible thermochromic anti-counterfeiting inks; Generally, the discoloration temperature is 34-100 ℃. Hand temperature color changing anti-counterfeiting ink is a kind of thermal color changing anti-counterfeiting ink. It refers to the ink that can change color under the temperature of 34-36 ℃. Its principle is to make the discolored compound change physically or chemically under heating, resulting in its own light absorption change.
Pressure sensitive anti-counterfeiting ink
Under the action of pressure friction, color ink can appear. It is made by adding special chemical reagents or color changing substances to the ink. When the colored or invisible pictures and texts printed with this ink are rubbed and pressed with hard objects or tools, chemical pressure color change or microcapsule rupture and dye leakage occur (red, blue, ink, green, purple, yellow, etc.). The display color can be selected according to the user's requirements and the secret mark can be designed.
Magnetic anti-counterfeiting ink
The anti-counterfeiting printing ink is made of magnetic powder material as a functional component. It is a conventional anti-counterfeiting ink, which is characterized by deep appearance color and simple detection instrument. It is often used in ticket anti-counterfeiting.
Optical variable anti-counterfeiting ink
The multi-layer optical film flake powder that can produce optical interference is used as the dispersion, and the ink with completely different colors is printed when the incident angle of light is 90 ° C and 30 ° C respectively. This technology is extremely complex and expensive. Few countries can produce it. It has been used in foreign banknotes.
Anti alteration and anti-counterfeiting ink
Ink with color developing chemical reaction to the chemicals used for coating.
Since there are so many varieties of anti-counterfeiting inks, what role do they play?
Common types include anti-counterfeiting phosphor, temperature discoloration powder, anti-counterfeiting fluorescent long and short fiber, UV anti-counterfeiting fluorescent ink, infrared anti-counterfeiting fluorescent ink, anti-counterfeiting thermal ink, ink with heating discoloration and sunlight discoloration, etc. (for example, photochromic inks that change color under sunlight and ultraviolet lamp, and thermotropic inks that can change color at different temperatures.) These anti-counterfeiting products can be widely used in the fields of tobacco and alcohol, food, printing, papermaking, textiles, famous clothing signs and so on, and have unique anti-counterfeiting effects.
Technical description
UV phosphor: red, yellow, green
Temperature change material: colorless to colorless reversible (blue, red, black), colorless to colorless 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 (transparent)
Temperature sensitive discoloration: the color of the temperature sensitive discoloration series can change when the temperature changes. The discoloration temperature can be adjusted in advance, and the changed color combination can also be adjusted in advance. As long as you give play to your imagination, new products will emerge one after another.
Photosensitive discoloration: imagine how wonderful the colorful discoloration clothing changes in the changing environment of light. There are different colors indoors and outdoors, cloudy and sunny days, clothing, etc.
Therefore, anti-counterfeiting ink is one of the important branches of anti-counterfeiting technology. It can not only meet the anti-counterfeiting and identification requirements of the masses, but also meet the identification and supervision requirements of professionals and management departments. Credit Suisse anti-counterfeiting can not only provide quality guaranteed anti-counterfeiting ink, but also provide follow-up technical support. In case of problems, special personnel can solve them, so as to avoid your worries.
