The new version of RMB anti-counterfeiting uses unique interference optical variable ink

The central bank announced that it will issue the fifth set of 100 yuan banknotes in the 2015 edition on November 12
.
The new version of RMB has adjusted the face pattern, anti-counterfeiting features and layout, improved machine readable performance, and adopted advanced public anti-counterfeiting technology to make it easier for the public to identify authenticity
.


Special papers, special watermarks, and special security threads


are used to print banknotes.
The papers are all produced and strictly controlled by licensed manufacturers in the country where the money is printed.
They are tough, clean, stiff, and wear-resistant, which are hard to find in the market
.
The main raw materials of banknote printing paper are cotton fiber and high-quality wood pulp.
Some countries also add their own unique products or chemical elements to the pulp, such as the three-skin component in the banknote printing pulp of Japan; the French printing franc is dedicated to the pulp The waters of the Arie River
.
An anti-counterfeiting expert (unnamed upon request) told the reporter of Science and Technology Daily that the unique formula of the paper can enhance the anti-counterfeiting property and is easy to identify
.
It can be identified by methods such as hand feel and color .


Watermarking technology is the use of online forming technology to emboss the paper surface through the embossed watermark roll, which displaces part of the wet paper industry to form various marks or patterns
.
Using the difference between the thickness of the watermark image and the paper in the blank area, the clear and transparent watermark image and text can be seen when the human eye sees through light
.
According to experts, even with the rapid development of science and technology today, watermarking is still recognized by anti-counterfeiting experts from all over the world as an effective anti-counterfeiting technology
.
The watermark has simple graphics and text levels, complex craftsmanship, and difficult to accurately imitate; in the blank space on the left side of the front of the fifth set of 100 yuan banknotes in the latest version of China's upcoming issue, you can see the fixed watermark of Chairman Mao's head in the light
.
In addition to the different locations of watermarking, the technical level of each country is also very different.
Japan has the strongest watermarking technology in the world, and no country can surpass it
.


  Security thread technology is also a big problem for paper anti-counterfeiting.
Experts say that security thread is also called anti-counterfeiting thread.
It uses special devices to implant metal wires or different colored polyester plastic threads, microprinting threads and fluorescent threads at specific locations.
Anti-counterfeiting mark
.
When observing the light, a complete or intermittent (open window) line can be seen buried in the paper base
.
The texture of the safety thread must be very soft, resistant to folding, not easy to break, and suitable for high-speed paper machines
.
With the development of science and technology and the improvement of technology, in order to prevent the use of color copiers to produce counterfeit money, the clamping method of the security line has been developed from the hidden and buried type (the security line is completely buried in the paper base) to the open window type, that is, security.
line portion exposed portion is sandwiched in the paper base, the paper is exposed to intermittent intervals, it has the shape of straight line, wavy, zigzag and the like
.
The optically variable hollow window security line added in the latest version of RMB in 2015 uses this technology.
Its line width is 4 mm.
It is located on the right side of the front of the ticket.
The security line is magenta.
It is safe to observe at an angle to the face of the ticket.
The line is green; through light observation, you can see the hollow number "100" alternately arranged in the front and back of the safety line
.


The unique interference-type optically variable ink


anti-counterfeiting ink is a special printing ink processed by a special process by adding special anti-counterfeiting materials to the ink binder, using its special functional pigments and binders to achieve the purpose of anti-counterfeiting
.
When the ink is in a light or thermal environment, the authenticity of the ink can be identified by observing the color change of the ink print
.
According to relevant experts, this type of anti-counterfeiting technology is characterized by simple implementation, low cost, good concealment, bright colors, simple inspection, and strong reproducibility.
It is the preferred anti-counterfeiting technology for banknotes, tickets and trademarks in various countries
.


  It is understood that the interference type optically variable ink used in banknote printing is the most complex new type of anti-counterfeiting ink.
It has a pearl-like luster and metallic effect.
This feature allows the ink imprint to tilt to a certain angle under natural light.
At a certain angle, the pattern is transferred from one hue to another, thereby changing the color
.
The 2005 version of 100 yuan RMB uses this technology.
It is yellow-green when viewed perpendicular to the face of the face, and dark green when viewed at a certain angle.
These dynamic color changes are also the most convenient and quickest method for RMB holders to distinguish forgery
.
In addition, the ink technology is complex and cannot be reproduced with high-definition copiers and color scanners, and the forgery is low.

.


  Another type of anti-counterfeiting ink is fluorescent ink
.
It is a combination of a variety of compounds and ultraviolet absorber resin
.
The number on the upper left side of the renminbi will display a rectangle "100/50/20/10/5" under ultraviolet light, and emit orange fluorescence.
On the contrary, the color of counterfeit banknotes will be dim under ultraviolet light
.
  The layout design of

various exquisite printing

banknotes is mostly based on characters, landscapes, paintings, buildings, etc.
, and is printed with complex and changeable shading
.
The anti-counterfeiting technology of printing mainly uses offset printing and gravure printing
.


  The printing of the main scene is mainly realized by hand-carved gravure printing.
The gravure uses the high-precision metal gravure hand-carved by the engraver.
The pattern printed on this plate is a three-dimensional pattern floating on the paper surface, with a strong three-dimensional effect and clear layers.
The hand feels bumpy
.


  According to reports, on the latest version of the 100 yuan ticket, the head of Mao Zedong, the national emblem, the name of the “People’s Bank of China” on the front, the denomination numbers in the upper right corner, Braille and the Great Hall of the People on the back are all engraved and embossed.
Obvious bumpy feeling
.
For example, Mao Zedong's head portrait, the touch is obvious when touching with his hand, especially on the hair and clothes.
When observed under a magnifying glass, the ink lines stand on the surface of the paper
.
Related experts believe that hand-engraved gravure is also an easy-to-identify anti-counterfeiting method for the public and is not easy to be copied
.
Hand-carved plate-making is different because of individual knife methods, >
.


  Gravure printing can also realize a printing technology of refractive latent image.
This technology uses the difference in the light tilt effect of different gravure lines horizontally and vertically to make two graphics and texts on the same part of the paper.

.
When looking at the light source, this kind of picture and text is a kind of picture and text.
For example, when the paper is rotated 45 degrees or 90 degrees horizontally, it will be transformed into another kind of picture and text
.
The elliptical flower in the upper right corner of China’s fifth set of 100 yuan renminbi can be rotated at the above angle to reveal the invisible denomination number "100"
.


  The lithographic offset printing is used to print the complex and changeable shading of banknotes
.
The lithographic offset printing graphics and the paper are almost on the same plane.
Most of the prints we see use this technology, but lithographic offset printing also has printing techniques that are difficult to imitate, such as offset offset printing.
This is a kind of precision.
High offset printing technology is generally difficult to imitate
.
This technology puts extremely high requirements on the precision of offset printing for printing and pattern docking, and it is a great test for the accuracy of the printing machine and the technology of the printer
.


  The reporter learned that the latest version of 100 yuan uses offset offset printing technology.
There are partial patterns of the denomination number "100" on the lower left side of the front face and the lower right side of the back face
.
Observed through light, the front pattern forms a complete denomination number "100"
.


Future Trends "Plastic Banknotes"


"Plastic Banknotes" use plastic as the main material and are a fiber-free polymer
.
It was first issued by Australia in 1988
.
The production cost of "plastic banknotes" is high, twice that of ordinary banknotes
.
However, its superior anti-counterfeiting technology is favored by central banks in many countries and is called the "counterfeit nemesis"
.
At present, many countries and regions including Australia, Brazil, Hong Kong, Canada, etc.
have issued plastic banknotes
.


  According to relevant experts, "plastic banknotes" have many advantages.
Its texture is close to ordinary banknote paper, and it is fiber-free, void-free, anti-static, and anti-copying
.
Because of the transparent paper window and hologram, plastic banknotes are difficult to imitate, which can effectively prevent the proliferation of counterfeit money
.
In addition, the face of plastic banknotes is cleaner, which is conducive to reducing currency circulation infectious diseases
.


  Compared with banknotes, it is easier to store and extremely recoverable
.
Even if the plastic banknote is folded or crumpled, it can be restored to its original shape after a short period of time, and even the crease will disappear
.
Plastic banknotes do not absorb liquids, and are less affected by other pollutants such as moisture, sweat or dust.
They are not as easy to attach to germs as banknotes.
If antibiotics are added during the production process, it can prevent the growth of bacteria for a long time and become a real "hygiene" Banknotes"
.


  In addition, compared with general banknotes, "plastic banknotes" are more convenient to operate on ATM machines, reducing the cost of recycling old banknotes.
In terms of environmental protection, plastic products can also be recycled through recycling, which is called "green banknotes
.
" Related experts believe that "plastic banknotes" have almost overcome all the shortcomings of ordinary banknotes, representing the latest achievements in anti-counterfeiting printing, and will also be the inevitable trend of future banknote anti-counterfeiting development
.