Current situation and development of the hottest l

The current situation and development of laser holographic anti-counterfeiting products

the most troublesome thing for consumers is to buy fake goods, which are expected to be fully put into operation at the end of 2019. How can we make it convenient for everyone to identify and let real goods have an ID card? People have thought about printing some complex patterns such as images and photos on commodity packages by printing, so that counterfeiters can't copy them to achieve the purpose of anti-counterfeiting. However, with the development of printing technology, it is no longer a difficult problem to copy the packaging of real goods by means of photographic plate making, which is no longer effective

counterfeiters plan to make fake labels, and laser holography is golden eyes to distinguish the true from the false

Xu Daxiong is one of the earliest scientists engaged in laser holography research in China. Entering Xu Daxiong's home, the living room is full of all kinds of holograms. These pictures not only record the brightness of light, but also the position relationship. There is much more information than ordinary photos. As long as they are shaken a little, they can show the stereoscopic feeling or color changes. So it is called a hologram, which means that all information is recorded

after each hologram, the site was demolished. It is almost impossible to make a scene where all the information such as the light and shade of the laser, the angle, and the placement position of the model are completely consistent, so the negatives obtained from each photograph are unique. Using the uniqueness of holograms, scientific and technological workers can use it to make master plates, which can transfer the stripe information like water waves on the master plate to the plastic film like printing, and produce anti-counterfeiting marks in batches. Without a photographic motherboard, the same logo cannot be produced, so it is theoretically impossible to fake

because this anti-counterfeiting mark is produced in batch to ensure the normal use of the experimental machine, the average cost of each mark is very low and will not increase the burden on consumers. The transformed rainbow color is also very easy for consumers to identify, so it really played a good anti-counterfeiting role when it was just invented. When consumers choose goods, they directly use whether there is a laser anti-counterfeiting logo to identify the true and false. Therefore, this technology was widely promoted and used throughout the country, and soon became the most common means of anti-counterfeiting

however, with the popularity of anti-counterfeiting marks and the proliferation of technology, counterfeiters are also secretly imitating this technology. After two years, during an inspection of the CD market, law enforcement officers found that fake anti-counterfeiting labels that could almost confuse the fake with the real were pasted on the outer package of the CD. The counterfeiter tore a hole in the laser anti-counterfeiting by scientific means

anti counterfeiting technology continues to upgrade, and scientists take precautions to stop counterfeiters

the key to consumers' difficulty in distinguishing true from false is that the first generation of laser hologram images do not have enough information, and the clarity, layering and brightness are not very good

how can we increase the amount of information? Xu Daxiong believed that it was necessary to work hard on photography. In an experiment, a graduate student of his research group extended the whole shooting time in order to fully expose the dark part by directly cooperating with brands and providing support for their purchase and selection of fabric manufacturers. As a result, the bright part of the negative was overexposed, This small mistake made them notice the shortcomings of the previous one-time overall exposure method, so can the whole pattern be divided into several areas for exposure? In this way, the exposure time is easy to control, and the recorded information can also be increased

the research team of Tu Wenfang, deputy chief engineer of Hubei Chenguang Industrial Group Co., Ltd., compiled a set of software. After continuous modification and improvement, under the control of this software, the computer can operate the laser camera within a few hours, accurately complete the shooting of 100000 points at a time, complete a complete laser hologram, and then transfer it to the plastic film. In this way, a new generation of laser anti-counterfeiting signs was born

because the shooting is controlled by the computer, the designer can also add some secret notes to the pattern in these images. If there is a counterfeiter who can imitate the hologram very realistically, it can also be used as a means to identify the authenticity

however, the innovation of anti-counterfeiting workers has never stopped, and scientists believe that technology should be constantly upgraded

in order to quickly distance ourselves from counterfeiters, we must make the existing laser anti-counterfeiting technology a step ahead of the implementation difficulty. The anti-counterfeiting logo was originally just a small label pasted on the commodity package. How to make the anti-counterfeiting logo more closely combined with the commodity has become the subject of almost all laser anti-counterfeiting researchers. They began to introduce a variety of technologies into the field of laser holographic anti-counterfeiting, and developed many signs that are more difficult to imitate

Quanzhou Pacific laser label Co., Ltd. has successfully developed holographic anti-counterfeiting packaging materials with wide widths, such as pet, PVC, aluminized paper, etc. originally, only small pieces of anti-counterfeiting labels have been made into a whole packaging material, which can be compounded with various plastic films and combined with color printing, coating, transfer printing, expanding the application field of anti-counterfeiting technology products

the card developed by Beijing Sanyou group adopts the anti-counterfeiting means of laser holography from the inside to the outside. Not only the packaging bag has holography, but also the card has holography, and the scientific and technological personnel are developing the scratch layer of holography. Because of different materials, each holographic production method is also very different, which makes counterfeiting very difficult

in life, the outer packaging of many goods is made of paper. Researchers have invented an anti-counterfeiting packaging material that integrates anti-counterfeiting, decoration and environmental protection, called laser holographic transfer paper

traditional laser holographic anti-counterfeiting marks are made on plastic film. How can we make laser holographic patterns on paper? Shaoxing Jinghua laser products Co., Ltd. has developed a method to combine holographic anti-counterfeiting and chemical technology. First, a layer of chemical material that can be stripped is coated on the plastic film that originally made the hologram, and then the hologram is pressed on it. Then, a way is found to stick the hologram to the paper. Finally, the plastic film is stripped off, and the hologram is completely transferred to the paper

sometimes we will encounter the situation that counterfeiters tear off the anti-counterfeiting marks on the packaging of real goods and paste them on fake goods. Based on holographic technology, Beijing holographic printing technology Co., Ltd. has taken the path of combining holographic and printing, holographic and packaging, holographic and other anti-counterfeiting technologies. The "rule disclosure composite layer anti-counterfeiting logo" developed by Beijing holographic printing technology Co., Ltd. has been widely used in the fields of national entry-exit inspection and quarantine, tobacco, wine and so on. This kind of hologram is divided into two parts: the surface layer and the bottom layer. The two layers can be torn apart. Before it is torn apart, it is an ordinary holographic anti-counterfeiting logo, but after it is torn apart, it cannot be restored into one. What is more ingenious is that after it is torn apart, it is still two complete holographic anti-counterfeiting logos. The surface layer is a hollow part, and the bottom layer is exactly the corresponding solid pattern. If you don't tear it, or if you tear the two layers of patterns, sorry, it's fake, which is very easy for consumers to identify

the teaco2 Laser High-Speed marking machine with graphic output jointly developed by the national laser Key Laboratory of Huazhong University of science and technology and Wuhan Huake laser anti-counterfeiting technology Co., Ltd. passes the high-energy laser beam through the specially designed text or graphic template, and marks clear permanent text or graphics on the articles after focusing, achieving the best effect that cannot be copied and eliminated, and effectively preventing and combating the forgery and counterfeiting of goods

there is no end to the progress of science and technology. In order to make laser holographic anti-counterfeiting become an insurmountable barrier for counterfeiters, it is necessary to constantly integrate various anti-counterfeiting means and the latest technologies. Transparent laser holography, which introduces nano material technology, is being studied

among all kinds of commodities, laser anti-counterfeiting means is the most widely used and the most widely used. It will continue to progress with the development of various technologies. In the future, laser anti-counterfeiting trademarks will contain more latest technologies and have stronger anti-counterfeiting capabilities. Article/Zhu Jun

source: approaching Science