Application of the latest anti-counterfeiting tech

2022-08-19
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Application of the latest anti-counterfeiting technology for high-end packaging

all along, Jinan gold testing mechanical testing machine has analyzed that a new anti-counterfeiting ink and printing technology have been applied to high-end packaging such as tobacco and alcohol in China, but the effect is often not satisfactory. It is necessary for us to seriously discuss the anti-counterfeiting defects in the current packaging printing, so as to promote the development of anti-counterfeiting technology. UV printing decorative inks have a wide variety and single performance. Some of them are troublesome and have low production capacity. For example, silk imitation metal etching ink can only be used to print patterns with sand effect. Its hemp sand is produced by the particles in the ink, which is difficult to be evenly distributed and has poor repeatability. Moreover, the ink has many varieties, such as coarse, medium and fine, and the printing effects are different. UV wrinkle printing ink needs to first use a low-pressure mercury lamp, and then use a medium pressure mercury lamp for secondary irradiation and curing to produce wrinkles. If the irradiation conditions change slightly, the patterns of wrinkles will be significantly different. UV printing ice flower ink needs high-power UV lamp to irradiate for a long time to produce ice flower pattern. Its energy consumption is very high, which will bake the substrate, with low production capacity and high scrap rate. Therefore, it is still unable to actively encourage new material enterprises to apply for the governor's quality award and Shandong famous brand products. Another disadvantage of printing is the poor consistency of printing. The main reason for poor printing consistency is that the basic elements such as dots and lines of decorative patterns printed by silk method are randomly and disorderly arranged, which depends on the mechanism of the process. Another reason is that the current version has a good service life of 40000 to 50000 copies, but only 10000 copies can be printed. In the process of use, the version gradually loosens and deforms, and the photosensitive adhesive gradually falls off, resulting in the gradual decline of printing quality. Some products, such as wuliangchun, are in large quantities. When printing, dozens of silk machines print together. The printing results will be affected by the difference in plate making, the shape of scraper, the amount of effort, and the distance between printing and paper. Therefore, even if the same product is printed with the same ink and the same factory, the printed matter will always have differences that can be observed by the naked eye, which provides convenience for some counterfeiters. This determines that the decorative patterns printed by silk method only have decorative function, but no anti-counterfeiting function

molded laser rainbow holography technology has been applied in tobacco and alcohol packaging. Rainbow holography can show a colorful three-dimensional picture. The image is floating and elegant, and the color is endless. Different pictures can be obtained from different angles. It has a perfect three-dimensional sense, and has an excellent decorative effect on the packaging. It once had high hopes for its anti-counterfeiting effect. However, driven by economic interests, many units that can prepare laser holographic molding templates undertake business externally, and if the pattern of holographic rainbow is not specially processed, it can be copied in a very simple way. Although the quality of the copied image has declined, and the holographic rainbow commissioned for imitation is also different from the real one, because the image of holographic rainbow is floating, its color changes infinitely from different angles, As long as these images are similar in appearance, it is difficult to distinguish the authenticity with the naked eye, so its anti-counterfeiting function has been significantly reduced

another important means of high-end packaging for anti-counterfeiting is anti-counterfeiting ink. These inks have special functions that ordinary inks do not have, including thermal discoloration, pressure-sensitive discoloration, photosensitive discoloration, humidity sensitive discoloration, UV fluorescence, etc. In packaging, thermal discoloration is used most. These inks are added with corresponding color changing pigments, which have specific properties. For example, above a certain temperature, the ink can change from one color to another. However, in China, except for a few anti-counterfeiting pigments such as currency and Securities printing, which are controlled and restricted, most pigments can be purchased, and there are many advertisements for anti-counterfeiting color changing inks, which you can buy and others can buy, which opens a convenient door for counterfeiters. Although each kind of heat sensitive anti-counterfeiting ink has a specific color change temperature, and the color before and after heat change is also constant, consumers often use lighters to bake the pictures and texts printed by the color change ink to identify the authenticity. As long as the color change occurs after baking, it doesn't matter about the slight difference in color, of course, it's impossible to determine the color change temperature. It often happens that a certain color change sign is printed on a famous cigarette package for the original purpose of anti-counterfeiting, but the counterfeiter takes out a lighter and bakes it at the color change sign of the fake, and one color turns into another color, so you have to believe it is genuine

in order to improve the anti-counterfeiting performance, manufacturers often combine many advanced printing processes, such as laser holographic rainbow, thermal discoloration, hemp sand, wrinkles, ice flower, bronzing, hot rainbow, etc. it seems that the more complex the process, the more difficult it is for others to copy. In fact, this is not the case, because the above processes all use silk printing or hot stamping, which is difficult to register during printing. Each process, including long glass fiber as a synergistic additive, has almost no impact on the composite cost, resulting in printing deviation. For this reason, the more complex the opening process in the 2G period in the 1990s, the more processing steps, not only the higher the printing cost, but also the greater the deviation. Even if almost every print in the same batch is different, and the counterfeiter's equipment is more and more advanced, the level of counterfeiting is higher and higher. Finally, he mixes the imitations in it, and he can't even distinguish the authenticity. How can consumers identify it? Therefore, the ideal anti-counterfeiting means and measures should pay attention to avoid using too many processes in the processing process

source: China United Printing

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