Printing anti-counterfeiting technology is a comprehensive anti-counterfeiting technology, including anti-counterfeiting design and plate making, precision printing equipment, and matching ink and paper. From the perspective of printing technology alone, printing anti-counterfeiting technologies mainly include: engraving and plate making, computer design of plate patterns, gravure printing, rainbow printing, pattern docking, double-sided printing technology, multi-color wiring printing, multi-color overlay printing, micro-printing Technology, latent image, invisible image and image interference printing.

What is printing anti-counterfeiting technology

Anti-counterfeiting is a preventive measure taken against activities that are copied or copied without the permission of the owner for the purpose of deception. Anti-counterfeiting is adopted for the purpose of anti-counterfeiting. It can accurately identify the authenticity within a certain range and is not easy to be copied and copied.

With the development of high technology and people's demand for high-quality packaging and printing products, the packaging and printing industry has begun a large-scale technological revolution in recent years. The combined use of multiple printing equipment and the mutual penetration of multiple printing processes have made printed products more unpredictable. Test, colorful. The products printed with these new technologies set up layers of obstacles and resistance for trying to be counterfeiters.

1. Flat convex printing and multi-process printing

In general, high-end packaging and decoration printed products are designed with large-area color blocks, multi-color sequential continuous adjustment screens, and complicated lines and patterns, etc., which brings certain difficulties to a single printing method. If plano-convex printing is used, that is, a solid color patch with a large pressure and a large area of ​​uniformity is used in the relief printing press, and the four-color continuous and complex line parts are printed with the soft pressure of the lithographic printing press. Very obvious. For some of the more demanding and complex prints, you can also use hand, convex, concave, flat, convex, concave leak and other multi-process co-printing. In a word, the more complicated the printing process and the more difficult the printing and packaging printing, the better the anti-counterfeiting effect.

2. Multi-color printing

Multi-color cross-printing is also called cross-color printing. It is usually printed by a letterpress printing machine. It is based on the requirements of the printed product. After placing the partition in the ink tank, different colors of ink are placed in different partitions. Under the serial action of the inking roller, the ink in the adjacent part is mixed and then transferred to the printing plate. Using this printing process, you can print multiple colors at once, and the middle transition is soft. Since it is difficult to see the placement distance of the ink tank partition from the printed product, it can also play a certain role in anti-counterfeiting. If this process is used for large-area shading printing, its anti-counterfeiting effect will be more prominent.

3. Gravure technology

It means that the picture and text parts on the printing plate are convex, and the printed pictures and text are also convex, and the picture and text lines are clear, the layers are clear, and you can feel it when you touch it. This printing technology not only protects the paper, but also has anti-counterfeiting properties. Important securities use gravure printing technology.

The types of gravure printing are divided into two types according to the plate-making method: engraved intaglio (there are hand-engraved intaglio and mechanically engraved intaglio), and two types of corrosion intaglio.

The anti-counterfeiting effect of hand-engraved gravure printing is better. Combined with anti-counterfeiting ink technology. Some printing anti-counterfeiting inks have larger pigment particles and require a thicker ink layer, while gravure printing has a stronger texture. The combination of the two will give a double anti-counterfeiting and decoration effect. For example, the use of fluorescent ink for gravure printing not only guarantees the slight convexity of gravure printing, but also ensures the use of fluorescent ink. The secret anti-counterfeiting function of both is also guaranteed.

4. Laser holographic iris printing

Laser holographic iris printing is to use laser holography to make a template in a shockproof room, and then transfer the pattern to a certain carrier through a certain pressure. Under the illumination of 45-degree point light source, its products can produce the unique effect of rainbow-like colors, and the three-dimensional sense of the image is very strong. It is favored by consumers and is known as the inkless color of the 21st century by some people of insight. Typography. At present, cold press coating and direct hot stamping of soup-printed film are mostly used. Due to the complex and difficult platemaking process of this technology, only a few domestic manufacturers can produce it, so the anti-counterfeiting effect is excellent. It should be particularly pointed out that holography uses a laser light source to capture the amplitude information and phase information of the scene light wave in a very short time in the shockproof room, and uses the principle of light interference to form each particle of the scene to form all the information. During the plate making process, the slight air flow in the room can cause the color of the hologram to change, so it is impossible to make two identical hologram plates anyway.

5. Hand-engraved version

Most packaging and decoration prints require key names and patterns to be raised. Most of these graphic protrusions are made by chemical etching method, and then they are combined with gypsum intaglio to complete the printing. Although this method has the advantages of simple manufacturing process and short cycle, but the embossing effect is not good, and it has no anti-counterfeiting effect. Therefore, many printing plants currently use engraved plate imprinting process.

The hand-carved version needs to use the copper plate material with better texture. The engraver's manual skills are used to carve the graphics (mainly patterns) required by the user with a carving knife. In particular, the chemical etching method can only make one level, and the dead angle of the edge part can not be made as a certain degree of solitude like manual engraving to improve the convex effect and prevent the paper from cracking. Because the skills of the engraver are not masterable in a short time, and different engravers have different engraving styles, even the same engraver cannot engrave two identical templates, so the imprinted with this template Packaging printed products not only have good embossing effect, rich layers, high embossing rate, but also have strong anti-counterfeiting effect.

6. Special gloss printing

Special gloss printing is a new and popular printing technology in the packaging and printing industry in recent years. The special gloss printing process currently mainly includes metal gloss printing, pearlescent printing, pearl gloss printing, refractive printing, variable gloss printing, laser holographic iris printing, crystal gloss printing, metal imitation etching printing and matte printing. Among them, the metal gloss printing is made of aluminum foil metal composite paper, with a more transparent ink to form a special metal gloss effect on the printed product. Pearlescent printing is to first use silver paste on the surface of the printed product, and then use extremely transparent ink. The silver glitter flashes through the ink layer to refract a pearlescent effect. Pearl gloss printing is the use of ink mixed with mica particles to produce a gloss effect similar to pearls and shellfish. Refractive printing is the unique effect of using a refractive plate to imprint the pattern on the printed matter under a certain pressure. Matte printing is to use matte ink printing or ordinary ink printing and then covered with matte film, which can produce hazy weak gloss characteristics, so it also has a safer anti-counterfeiting effect.

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