This is how the yuan was made

Intaglio printing: not easy to imitate and forge

Gravure printing, that is, gravure printing, is the inks contained in the gravure pits directly on the substrate, the thickness of the printed picture is determined by the size and depth of the pits, if the pits are deeper, it contains more ink, and the ink layer left on the substrate after the impression is thicker; On the contrary, if the pits are shallow, the amount of ink contained is less, and the ink layer left on the substrate after embossed is thinner

As a kind of printing process, gravure printing occupies an extremely important position in the field of printing packaging and graphic publishing with its advantages of thick ink layer, bright color, high saturation, high plate resistance, stable quality and fast printing speed.

At the same time, because the thickness of the gravure printing line and the shade level of the ink can be arbitrarily controlled when engraving, it is not easy to be imitated and forged, especially the depth of the ink pit, the possibility of realistic engraving according to the printed text and pictures is very small, making it the only choice for banknote printing.

"No concave is not a coin" - the key of anti-counterfeiting technology

At the same time, intaglio printing banknotes have an obvious concave and convex sense, which has become the key to anti-counterfeiting technology, the printing world has a "no concave not a coin", I believe that in our daily life, we have also had the experience of identifying counterfeit money through the portrait pattern on the large denomination banknotes and the concave and convex level on the national emblem.

China independently developed the world's first gravure counterprinting machine

The traditional gravure printing technology can only be printed on one side during the printing process, and after printing one side, the ink needs to be dried and then printed on the other side, which undoubtedly increases the time cost, and the "SD gravure to printing" technology can realize gravure printing on both sides at the same time, greatly improving the production efficiency.

China independently developed the world's first gravure printing machine, which solved the worldwide problem of gravure printing, and successively obtained international patent authorization in Japan, Switzerland, and Germany.

Anti-counterfeiting: The fusion of technology and art?

The printing of modern banknotes is not only a simple technical problem, but also a perfect combination of technology and art design.

Launched in November 2015, the fifth generation of the new 100 yuan, compared with the old version of the yuan, added a 4 mm wide light change openwork window security line located on the right side of the front face of the ticket to improve the anti-counterfeiting performance. When the viewing Angle changed from direct vision to squint, the color of the security line changed from magenta to green; When observed through light, it can be seen that the hollow text "￥100" is alternately arranged in the security line.

Light change hollowed window safety line

Light change hollow window safety line has low requirements for light source, obvious color changes, and integrated hollow text features, which not only increases aesthetics, but also is conducive to public recognition.

The new version of 100 yuan in the increase of light change hollow-out window safety line at the same time, but also retain the old version of the magnetic fully buried safety line design, conducive to public identification while taking into account the machine readable performance, fully reflects the technical improvement and innovation.

When designing this new security line, technicians conducted repeated tests, from 2 mm to 5 mm, the security line is too narrow, the identification effect is not obvious, too wide is not conducive to the overall flatness of the banknote, and finally choose 4 mm, the balance point of anti-counterfeiting technology and artistic design.

Optical security wire

(3) In addition to printing money, there is also coinage

In addition to printing money, China also has core technology in coinage.

We usually see some coins will have a uniform distribution of silk teeth on the edge, this uniform distribution will benefit from the "coin side full tooth interval half tooth technology", this technology has won the 17th National Invention Exhibition gold medal, enhance the technical difficulty of coin manufacturing, enhance the public anti-counterfeiting performance of coins, is an important embodiment of the progress of coin technology.

In order to realize the effect of full tooth spacing half tooth, firstly, the sparse tooth electrode and the dense tooth electrode are machined respectively, and the two are fastened by fasteners to form a combination electrode. The structure form of the full tooth interval half tooth of the combined electrode is reflected on the silk tooth sleeve mold by using the EDM forming technology, and the required coin can be printed by using the silk tooth sleeve mold.

(4) Localization and export of the whole industrial chain