Fluorescent anti-counterfeiting classification

1. Colored fluorescent ink The pattern printed with this ink is a color in ordinary light, but it will be brightly fluorescent under ultraviolet light and even appear in another color. Colored fluorescent inks are generally applied to a fixed position or a pattern of a banknote.

2. Colorless fluorescent ink The printing pattern of this ink is invisible under normal light, and bright fluorescence can be seen under ultraviolet light. Such inks are used on the fifth set of RMB denomination notes.

3. The application history of magnetic ink is relatively long, but it is mostly used as a qualitative indicator. Modern banknotes use magnetic ink as a quantitative test indicator for machine reading, and also increase the difficulty of forgery.

4. The light-changing ink adopts a special optically variable material. After printing the pattern, the color of the pattern changes with the observation angle, and changes from one color to another. For example, the denomination number in the lower right corner of the fifth set of RMB 100 and 50 yuan bills is printed using light-changing ink.

5. Anti-copying ink When copying banknotes with a color copier, the ink printed pattern will change color, resulting in a completely different color tone from the original ticket surface. This ink is used on the yen.

Fluorescent anti-counterfeiting, also known as ultraviolet light anti-counterfeiting, anti-counterfeiting label factory uses special fluorescent ink to bond to the label. The naked eye and the hand touch can't find the running water code, text or pattern. It must be illuminated by fluorescent light or ultraviolet light to see it. Invisible fluorescent water The code is generally used in corporate anti-smuggling goods.

The technology uses a double invisible anti-counterfeiting ink to print fixed text, graphics, numbers or flow mobility numbers in the security label. This technology is extremely concealed, and the hidden technology can not be found by the naked eye and the touch of the hand. At the time of authenticating the authenticity, a special testing instrument must be used. The fluidity number of the technology can be used on the anti-smuggling goods, and the anti-smashing effect can be achieved without using the anti-smashing system, and the technology is Invisible technology, not easy to be detected, not easy to be imitated, invisible passwords and barcodes can correspond (or do not correspond), tracking to destroy the label to achieve the goods.

Ultraviolet fluorescent ink

The principle of anti-counterfeiting is to add a visible fluorescent complex with ultraviolet excitation to the ink. It can emit visible light (400 ~ 800nm) special ink under ultraviolet light (200 ~ 400nm). According to the wavelength of the excitation light source, it can be divided into short-wave ultraviolet excitation fluorescent anti-counterfeiting printing ink (excitation wavelength 254nm) and long-wave ultraviolet laser fluorescent anti-counterfeiting printing ink (excitation wavelength is 365nm). According to the color of the ink, it is divided into two types: colored fluorescent ink and colorless fluorescent ink. Among them, the commonly used fluorescent materials are mainly classified according to their composition. First, the organic fluorescent material is an unsaturated molecule with a large conjugate, mostly excited by sunlight, used for color decoration, poor fluorescence stability, easy to oxidize and decompose; second, inorganic fluorescent material synthesized by high temperature is used The luminescent materials for fluorescent screens and fluorescent tubes have good radiation resistance and high stability, but are difficult to disperse in oily media. It is difficult to synthesize and has poor water resistance; its rhodium is a chemically synthesized rare earth organic complex as a fluorescent material. The conventional organic rare earth fluorescent complex has simple preparation, is easy to disperse, dissolve and refine in an oily medium, and has a strong fluorescent effect under the excitation of ultraviolet light under ultraviolet light.