Recently, the people's Bank of China issued a new version of the 5 yuan note.

However, many netizens said that going out is to pay by mobile phone, and they don't remember the "taste" of cash.

Friends who haven't used cash for a long time also said that they can't get any changes and differences.

In the early days of the founding of new China, RMB printing technology was provided by the Soviet Union. After Sino Soviet relations deteriorated, the Soviet Union began to refuse to provide this technology. Without technology, we have to create our own. In three years, the R & D personnel have realized the completely independent banknote printing from paper ink, format design, plate making engraving, anti-counterfeiting technology, printing technology and printing machinery.

Many factors should be considered in banknote printing, such as the beauty, circulation, waterproof and anti-counterfeiting of RMB, among which anti-counterfeiting is the most important, which involves the economic security of a country.

With the continuous efforts of technicians, China has made a world leading technological breakthrough -- SD gravure printing.

China Banknote Printing and Minting Corporation first applied for an invention patent of "printing method of gravure pair printing perspective superimposed latent image" in 2005.

That's why every time I get cash, I touch Chairman Mao's collar and head portrait.

In addition to the anti-counterfeiting patent technology related to touch invention, there are also two types of important anti-counterfeiting patents in style and appearance. On the basis of the current fifth set of RMB banknote anti-counterfeiting technology, the new 50 yuan, 20 yuan, 10 yuan banknotes have increased the number of face value. By changing the observation angle, not only can the color change, but also the light band can roll up and down.

This technology has been applied in the 100 yuan banknote issued in 2015. In addition, the new version of the 5 yuan note to be issued this year will also start to use this technology.

For this technology, China Banknote Ink Co., Ltd. and China Banknote Printing and Minting Corporation applied for an invention patent of "anti counterfeiting pattern with light variable structure and its preparation method" in 2013. The patent preparation method, through the accurate overprint of two printing methods, produces the relief structure of curve with continuous change of line width. It has the characteristics of intuitive, easy to identify, anti copy and not easy to forge.

At the same time, the patent technology has also been distributed in Europe and the United States. Shao Guowei, technical director of China Banknote Corporation, once said: "the cost of printing ink with this light effect is very high. The printing cost of digital" 100 "accounts for one eighth to one tenth of the whole new banknote."

In terms of style and appearance of anti-counterfeiting technology, in addition to the use of light variable effect patents, there are also many details of the "light variable hollow window safety line". By embedding special metal wire or polyester plastic thread of different colors in a specific position of the banknote, color change and hollowed out character features can be formed, which can not only increase the beauty, but also be conducive to public recognition.

China Banknote Printing and Minting Corporation has also applied for many patents for the design of "light variable hollow window safety line".

Don't underestimate these technologies. In 232 countries and regions around the world, only more than 50 countries can make their own currency, and the rest need to be processed by other countries. This shows how important coin printing technology is. At present, China Banknote Printing and Minting Corporation 1 has 1732 patents, and new patents are developed every year.

At present, China Banknote Printing and Minting Corporation has made foreign currency for Vietnam, Thailand, Cuba, Albania, Laos, North Korea, Guinea, Cambodia, Mongolia, Nepal and other countries.

It is precisely by virtue of the above RMB anti-counterfeiting patent technology that the anti-counterfeiting function of RMB can be greatly improved, thus ensuring the economic security of our country and laying a solid foundation for the steady development of the country.

Salute the researchers!

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