Seven categories of fluorescent anti-counterfeiting technology

 Introduction of fluorescent anti-counterfeiting
What is fluorescent anti-counterfeiting? Fluorescence, also known as "fluorescence", is simply a fluorescence phenomenon in which color changes occur when ultraviolet light is shone on the fluorescent material.
Two, securities fluorescent security
The fluorescence phenomenon of COINS and tickets is usually understood as the luminous phenomenon or regular color change in the fixed position of the irradiated object. Irregular color change and phenomenon cannot be recognized as fluorescence phenomenon, because the yellow mildew spot, oil spot and so on will also change color under the purple lamp, so it is better to appreciate the fluorescent ticket with reference. The fluorescence of some early varieties was very weak, while the light emitted by others was difficult to detect, which was clear by comparison.
There are many anti-counterfeiting technologies, and fluorescence is related to paper and printing ink. RMB paper is mainly composed of short cotton fleece, the paper is smooth, tough, folding resistance, good stiffness, and a certain degree of chemical corrosion resistance, can be used for a long time and not easy to damage. It is worth mentioning that the paper whiteness of RMB is good, absolutely no fluorescence reaction. Therefore, the overall surface of the RMB fluorescent white COINS, should be a kind of anti-counterfeiting measures, such as a point in the gold star too white.
However, the raw materials of ordinary printing paper are mostly straw, wheat straw, rags, etc., with soft and rough texture, insufficient toughness and tension, the paper is easy to break, and many of them are bleached with fluorescent agent, especially those made of recycled materials. Since the issuance of tickets is not as standardized as RMB, the use of paper is very miscellaneous, and many tickets have the fluorescence phenomenon of the whole surface. For example, in 1986, the local grain coupons in Jiangsu Province had a more appreciation Angle under the fluorescence than under the sunlight.
Paper bleaching is when a fluorescent agent is attached to the paper to whiten the surface of the paper. I think, fluorescent bleaching technology at that time should be considered advanced technology, now, the abuse of fluorescent agent caused environmental pollution. Fluorescent ink technology is very mature, is one of the most important means of printing money. There are also many applications in the note, such as the 10 jin denomination of the note below is pink fluorescence.
Three, fluorescent anti-counterfeiting classification
Colored fluorescent Ink The pattern printed with this ink appears to be one color in ordinary light, but under ultraviolet light it is seen to glow brightly or even appear to be a different color. Colored fluorescent ink is generally used in a fixed position or a certain pattern on the banknote.
2, colorless fluorescent ink This ink printing pattern is invisible under ordinary light, but can be seen in ultraviolet light emitting bright fluorescence. For example, this ink is used on the fifth set of RMB notes of all denominations.
3, the application of magnetic ink has a long history, but more as a qualitative indicator. Modern banknotes use magnetic ink as a quantitative detection index for machine reading, but also increase the difficulty of counterfeiting.
4, photovariable ink USES a special light variable material, printed into a pattern, with the different Angle of view, the color of the pattern will change, from one color to another color. For example, the denomination Numbers on the lower right corner of the front of the fifth set of RMB 100 yuan and RMB 50 yuan banknotes are printed with photovariable ink.
Copier ink When a bill is copied by a color copier, the color of the print in the ink changes so that the resulting copy will produce a completely different color from the original. Such ink is used on the Japanese yen, for example.
6. Patterns printed with infra-red ink can be seen in colour under ordinary light, but have no colour when observed with infra-red instruments.
7, pearlite ink printing patterns with different viewing angles will appear a variety of bright metallic luster effect or rainbow effect. The euro and the yen have adopted the technology.
Fluorescent anti-counterfeiting technology is also derived from the anti-counterfeiting technology on the RMB, paper money is the most stringent anti-counterfeiting technology is the most complex, therefore, many anti-counterfeiting technologies are derived from paper money.