Overview of the most popular chemical ink anti-cou

Overview of chemical ink anti-counterfeiting technology

concept and principle:

anti counterfeiting ink: ink with anti-counterfeiting performance. Anti counterfeiting ink is an extremely important anti-counterfeiting technology field, which has a wide range of applications and involves many disciplines. It is a special ink with anti-counterfeiting function by adding some special substances into the ink, which is specially developed and applied to the printing of anti-counterfeiting printing products. Its formula and process are confidential and should be strictly managed; Its products should also be supplied to designated manufacturers at fixed points and on a regular basis, and special personnel should be assigned to use the products on a fixed machine to strictly prevent proliferation

1) photosensitive anti-counterfeiting ink:

ink that can emit visible light under light irradiation. The light here refers to visible and invisible light such as ultraviolet light, infrared light and sunlight

a. UV fluorescent ink: ink that can emit visible light (nm) under ultraviolet (nm) irradiation. It usually refers to the visible fluorescent anti-counterfeiting printing ink excited by short wave ultraviolet with the excitation wavelength of 254nm, and the visible fluorescent anti-counterfeiting printing ink excited by long wave ultraviolet with the excitation wavelength of 365nm

b. photochromic ink excited by sunlight: an anti-counterfeiting printing ink that can emit visible light of nm under sunlight. From the perspective of application, this kind of ink changes color due to the action of sunlight. In fact, it also changes color due to ultraviolet radiation

c. infrared anti-counterfeiting ink: an ink made by matching the different absorption characteristics of infrared (nm), which can be detected or recognized by instruments. A pair of substances with different infrared absorption characteristics are added to the ink. Products printed with infrared ink have no reaction under ordinary light, while corresponding signals or graphics can be observed under infrared light detection

2) thermal anti-counterfeiting ink:

ink that can change color under the action of heat. It is usually divided into reversible and irreversible thermochromic anti-counterfeiting inks; Usually, the color change temperature is Celsius. Hand temperature color changing anti-counterfeiting ink is a kind of thermal color changing anti-counterfeiting ink, which refers to the ink that can change color under the action of Celsius temperature. The principle of thermochromism is to make physical or chemical changes of discolored compounds under heating, resulting in changes in their light absorption

3) pressure sensitive anti-counterfeiting ink:

under the action of pressure friction, the ink with 2014 color can appear. It is made by adding special chemical reagents or color changing substances to the ink. Printed with this ink, such as airware alloy of Rio Tinto Alcan (kenlian aluminum company) and the new generation aluminum alloy of Alcoa (okonenko aluminum company) are typical colored or invisible graphics and texts. When hard objects are used or local tools between laboratories are convenient for friction and pressing, That is, chemical pressure color change or microcapsule rupture, dye leakage and color (red, blue, ink, green, purple, yellow, etc.). You can choose the display color and design the secret mark according to the user's requirements

4) magnetic anti-counterfeiting ink:

anti counterfeiting printing ink made of magnetic powder material as a functional component. It is the most commonly used anti-counterfeiting ink, which is characterized by deep appearance color and simple detection instrument. It is mostly used in ticket anti-counterfeiting

5) optical variable anti-counterfeiting ink:

it is made of multilayer optical film flake powder that can produce optical interference as a dispersant, and the ink is completely different in color when the light incidence angle is 90 ° C and 30 ° C respectively. This technology is extremely complex and expensive. Few countries can produce it, and it has been used in foreign banknotes

6) anti alteration and anti-counterfeiting ink:

ink with color chemical reaction to the chemical substance used for painting

Application

common types include anti-counterfeiting fluorescent powder, temperature discoloration powder, anti-counterfeiting fluorescent long and short fibers, 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 the sun and UV light, and thermotropic inks that 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 labels and so on, and have unique anti-counterfeiting effects

technical description:

UV phosphor: red, yellow, green

temperature variable material: color 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 variable reversible anti-counterfeiting ink: (pink, blue, black, orange) colored → colorless → colored (pink, green) colorless → colored → colorless

temperature sensitive discoloration: the temperature sensitive discoloration series can change the color when the temperature changes. The discoloration temperature can be set in advance, and the changed color combination can also be set in advance. As long as you play your imagination, new products will emerge in endlessly

photosensitive discoloration: imagine the colorful discoloration. Donghua University has developed a breakthrough 3D printing thermosetting material technology. How wonderful the changes of clothing in the changing environment of light are. Indoor and outdoor, cloudy and sunny days, clothing, etc. have different colors

source: China anti counterfeiting information