Complete set of detailed information on anti-counterfeiting printing technology

Printing anti-counterfeiting technology is a comprehensive anti-counterfeiting technology, including anti-counterfeiting design and plate making, precision printing equipment and supporting ink and paper. From the point of printing technology, printing anti-counterfeiting technology mainly includes: engraving plate making, designing plate patterns by computer, gravure printing, rainbow printing, pattern docking, double-sided printing technology, multi-color line printing, multi-color overlapping printing, micro-printing technology, refractive latent image, invisible image and mixed image printing. With the development of high technology and people's demand for high-quality packaging printed matter, the packaging and printing industry has started a wide-ranging technological revolution in recent years, and various printing equipment has been applied. The products printed by these new technologies set up layers of obstacles and resistance for those who try to make fakes.

Introduction of Chinese name: Introduction of anti-counterfeiting printing technology: Comprehensive anti-counterfeiting technology includes anti-counterfeiting design and plate making, precision printing equipment and other technologies; engraving and plate making, computer-designed plate patterns and other common technologies; auxiliary equipment such as plano-convex printing and multi-pass printing; common technologies, processes and methods, materials and additives of anti-counterfeiting additives, common processes of plano-convex combined printing and multi-pass combined printing. High-grade packaging and decoration printed matter generally adopts large-area color block, multi-color sequential continuous tone picture, complex lines and pattern design, and a single printing method brings certain difficulties. If the plano-convex combination printing is used, that is, a large-area solid color block with high pressure and uniform ink printing by relief printing machine is used, and the four-color continuous harmonic complex line part is printed by the advantage of flat and soft printing by lithography machine, the effect is very obvious. For some demanding and complicated printing, you can also use manual, convex, concave, flat, convex, concave and so on. In short, the more complex the printing process is, the more difficult it is to print, and the better the anti-counterfeiting effect will be. Multicolor printing Multicolor printing is also called mixed color printing. Generally, it is printed by a relief printing machine. According to the requirements of printing, after placing a partition in the ink tank, ink of various colors is put into different partitions. Under the string action of the string rollers, the adjacent parts of the ink are mixed and transferred to the printing plate. With this printing process, multiple colors can be printed at one time, and the middle transition is soft. Because it is difficult to see the placement distance of the ink tank partition from the printed matter, it can also play a certain anti-counterfeiting role. If this technology is used in large-area shading printing, its anti-counterfeiting effect will be more prominent. Gravure printing technology means that the graphic part on the printing plate is raised, and the printed graphic ink is also raised, and the graphic lines are clear and distinct, which can be felt by hand. This printing technology not only protects the paper, but also has anti-counterfeiting performance. Gravure printing is used for important securities. The types of intaglio printing can be divided into two types according to plate-making methods: engraved intaglio (including hand-carved intaglio and mechanical engraved intaglio) and etched intaglio. The anti-counterfeiting effect of hand-carved intaglio printing is better. Combined with anti-counterfeiting ink technology. Some printing anti-counterfeiting inks have larger pigment particles and need thicker ink layers, while gravure printing has stronger texture. The combination of the two will achieve double anti-counterfeiting and decorative effects. For example, the use of fluorescent ink in gravure printing not only ensures the micro-convex feeling of gravure printing, but also ensures the use requirements of fluorescent ink, and their secret anti-counterfeiting functions are also guaranteed. Laser holographic iris printing Laser holographic iris printing is to make a template with laser holography in an earthquake-proof room, and then transfer the pattern to a certain carrier through certain pressure. Under the irradiation of 45-degree point light source, its products can produce colorful rainbow-like unique effects, and the image has a strong three-dimensional effect, which is favored by consumers and is called 2 1 century ink-free color printing by some people of insight. At present, cold pressing coating and direct blanching of soup printing film are widely used. Because the plate-making process of this technology is complex and difficult, only a few domestic manufacturers can produce it, so the anti-counterfeiting effect is excellent. What needs to be pointed out in particular is that holography uses laser light source to capture the amplitude information and phase information of the scene light wave in a very short time, and uses the interference principle of light to form every particle of the scene and all the information. In the process of plate making, the subtle airflow in the room will lead to the discoloration of holographic images, so it is impossible to make two identical holographic plates anyway. Manual block printing Most packaging and decoration printed matter requires key names and patterns to be raised. Most of these graphic protrusions are made into relief by chemical etching, and then combined with gypsum intaglio for embossing. Although this method has the advantages of simple manufacturing process and short cycle, the embossing effect is not good and it does not have anti-counterfeiting effect. So at present, many printing houses use block printing technology. Hand-carved plates need to be made of copper plates with good texture, and the pictures and texts (mainly patterns) needed by users are carved layer by layer with a carving knife by the sculptor's manual skills, which can generally carve 3 ~ 4 layers. In particular, chemical etching can only be done at one level, and the dead angle of the edge part can not be done to a certain extent like manual carving, so as to improve the embossing effect and prevent the paper from cracking. Because the skills of sculptors can't be mastered in a short time, and different sculptors have different carving styles, even the same sculptor can't carve two identical templates. Therefore, the packaging printed matter imprinted with this template not only has good embossing effect, rich layers, high embossing rate, but also has strong anti-counterfeiting effect. Special gloss printing Special gloss printing is a new printing technology popular in packaging and printing industry in recent years. At present, the special gloss printing processes mainly include metallic luster printing, pearlescent printing, pearl luster printing, refractive printing, variable gloss printing, laser holographic iris printing, crystal luster printing, imitation metal etching printing, matte printing and so on. Among them, metallic luster printing uses aluminum foil metal composite paper and transparent ink to form a special metallic luster effect on printed matter. Pearlescent printing is to use silver paste on the surface of printed matter first, and then use extremely transparent ink. The silver glitter reflects the pearlescent effect through the ink layer. Pearl gloss printing is printing with ink mixed with mica particles, which makes the printed matter have the luster effect similar to that of pearls and shellfish. Refractive printing is the use of refractive plate, through a certain pressure, imprinted patterns on printed matter, thus producing a unique effect of light refraction. Matte printing is to use matte ink printing or ordinary ink printing and then cover the extinction film, which can produce hazy and weak luster, so it also has a safer anti-counterfeiting effect. Representative examples of digital transcoding information printing are 1 and bar code. Commodity bar code is a kind of code of commodities, which is designed by human beings for effective management of computers and other commodities. If commodity technology can be used reasonably, including selecting the carrier, printing method, printing machine and printing position of barcode, it is possible to make commodity barcode technology have anti-counterfeiting function. 2. Code anti-counterfeiting identification and telephone identification system Code anti-counterfeiting identification and telephone identification system (800 telephone inquiry anti-counterfeiting) is to set a random password on each product, and archive all records of all product networking in the anti-counterfeiting data center library, so that consumers can check whether the password is correct by telephone, computer and other tools to identify the authenticity of products. This anti-counterfeiting technology is implemented on the same object to achieve high anti-counterfeiting. The most typical example is paper money, such as RMB, which uses seven anti-counterfeiting methods. Therefore, various chemical anti-counterfeiting technologies should also be combined with other anti-counterfeiting technologies to improve the anti-counterfeiting strength of brand-name products. Techniques and methods Relief pattern anti-counterfeiting technology Relief pattern technology is a special technology that uses special means to make different special textures for background colors, characters, patterns, images and other layout components. It can not only play an anti-counterfeiting role, but also play a decorative role, and is an ideal technology for the layout design of certificates and tickets. Because the design can't be repeated, it can't be scanned into the original picture and can't be copied. Micro anti-counterfeiting design technology Micro anti-counterfeiting printing technology adopts the most advanced digital image reproduction technology. Its principle is to print patterns or characters on the surface of documents in a miniature way, and the images can be reproduced realistically through a magnifying glass. Dual-card stealth anti-counterfeiting design technology Dual-card stealth anti-counterfeiting technology adopts the principle of pixel imaging, and the original information can be printed separately, making people unable to see the original pattern clearly. When the two cards are merged, the pixel information on the two cards is supplemented by one to form an image. Because it can't understand various factors such as the angular distance of the original design, it can't be scanned into the original image. Anti-counterfeiting paper and auxiliary paper that can't forge materials are the material basis for printing various securities. Some special papers made by special processes basically have anti-counterfeiting features. The anti-counterfeiting technology used in special paper mainly includes: As a new development in the field of anti-counterfeiting technology, anti-counterfeiting paper has the following advantages. First of all, it makes the holographic pattern directly on the paper and removes the plastic information layer, so it is unlikely to be copied. Secondly, the patterns on this kind of anti-counterfeiting paper can be designed and made according to the requirements of merchants, and it can produce papers with different textures and weights (70g ~ 400g, such as coated paper, cardboard and cardboard), and it can also be offset printed and screen printed like ordinary paper, which is reliable and convenient. Thirdly, the price of this kind of anti-counterfeiting paper is only slightly higher than that of ordinary composite gold and silver cardboard, which is only one tenth of the price of holographic anti-counterfeiting trademark, and it saves the labor cost of labeling and is easily accepted by merchants. Fourthly, the products directly packaged with this laser anti-counterfeiting paper can not only play an anti-counterfeiting role, but also be very beautiful. Fifth, holographic paper will gradually replace laser holographic products containing plastic films, because it can be weathered in soil and will not cause environmental pollution. At present, some manufacturers who produce cigarettes, wine, cosmetics and food have begun to try to use laser holographic anti-counterfeiting paper, which has achieved good economic benefits. It is expected that this new anti-counterfeiting packaging material will have a broad market. Watermark paper Watermark paper can be made into paper by technical means in the manufacturing process. These patterns are not easy to see under normal circumstances and can only be seen under strong light. Most of the larger denominations of RMB issued in China are printed on watermark paper. Watermark is still recognized as an effective anti-counterfeiting technology by anti-counterfeiting experts all over the world in the era of advanced technology, and continues to be adopted and developed by various countries. Most countries' banknotes, important international archives, facilities drawings and various tickets are also printed with watermark paper. For example, in the new edition of $ 100 paper of 196, the head watermark of "Franklin" is adopted, and watermarks such as "Tiananmen Square" and "* * *" are made on large denomination RMB paper in China. Watermarking has been widely used in other papers except paper money. Watermark has fixed, unfixed and semi-fixed positions in paper. The production technology of watermark paper was invented by Italian paper experts in the 13 century. Because it involves complicated technological processes such as design, carving, netting and papermaking in the manufacturing process, counterfeiters are often at a loss. Checking the watermark is also one of the most effective means to identify the authenticity. Of course, it is not economical to use a lot of watermarks in packaging and decoration at this stage. An ink is made of special materials, and a watermark-like mark is printed on ordinary coated paper, which is very similar to the watermark effect. Anti-counterfeiting additive The so-called anti-counterfeiting additive is a special additive made by adding anti-counterfeiting materials with special properties to ink binders and processing them through special processes. At present, the anti-counterfeiting additives developed and applied in China can be divided into 10 categories, which are described respectively. The specific implementation is mainly to add anti-counterfeiting additives to tickets, product trademarks and packaging paper layers by using special coating machines or other equipment. This anti-counterfeiting technology has the characteristics of simple implementation, low cost, good concealment, bright color, convenient inspection (even hand temperature can change color) and strong reproducibility, and is the first choice for anti-counterfeiting technology of banknotes, tickets and trademarks in various countries. 1, ultraviolet fluorescence anti-counterfeiting technology, special ink that can emit visible light (400-800 nm) under ultraviolet (200-400 nm) irradiation. 2. Anti-counterfeiting technology of sunlight excitation discoloration, which can emit visible light (400 ~ 800 nm) in sunlight. This kind of anti-counterfeiting technology appears to be discolored by the action of the sun, but it is also discolored by ultraviolet radiation in essence. 3. Heat-sensitive anti-counterfeiting technology can change color under the action of heating. According to the different temperature required for color change, it can be divided into hand temperature color change anti-counterfeiting technology and high temperature color change anti-counterfeiting technology. 4. Reactive color-changing anti-counterfeiting technology Various chemical substances added to paper can produce various chemical reactions under certain conditions, thus changing the color of paper and achieving the purpose of anti-counterfeiting. As a part of heat-sensitive anti-counterfeiting technology, pressure-sensitive anti-counterfeiting technology and humidity-sensitive anti-counterfeiting technology belong to color-changing anti-counterfeiting technology. In addition, adding acid-base indicator to paper as trademark printing can change the color of paper when encountering color-changing agent, thus achieving the purpose of anti-counterfeiting. 5. Magnetic anti-counterfeiting technology is a special anti-counterfeiting technology made by mixing magnetic iron oxide powder into paper. At present, it is mainly used to print magnetically encoded characters and symbols of bank bills, with the function of recording and storing information. 6. Droplet disappearance technology This anti-counterfeiting technology is a mixture of substances that can produce biochemical reactions. This additive can be used to mark the packaging and printed matter that need anti-counterfeiting, and then the chemical reagent can be selected according to the formula. Characters or patterns will be exposed when methods such as slight heat, wetting and rubbing are used. 7. Liquid crystal anti-counterfeiting technology adds a compound with crystallization performance to the ink. Under the influence of weak current and temperature, liquid crystals show alternating patterns and colors due to lattice changes. Packaging and decoration products printed with this ink can react with the change of temperature. 8. Printing spot color ink Printing ink is a mixture of pigments, fillers and binders. Among them, the choice of pigment composition is an important factor to determine the hue and vividness of printed matter. Ink color matching is a very complicated problem. The differences in chromaticity and brightness between some organic pigments and inorganic pigments in nature and some inherent colors cannot be realized by artificial synthesis.