With the intensification of domestic and international market competition, in order to meet the increasingly stringent requirements of users on the quality of packaging products, special printing is more and more widely used in the post-press processing of packaging and printing products. In order to further improve the personalization of products, many manufacturers In addition to the development and application of new special processes, the original processing technology is combined with special inks and special materials to form new special printing technologies, thereby enhancing the competitiveness of products in the market. At present, in the post-press processing of packaging and decoration, more advanced special printing processes are continuously used in post-press processing such as cigarette packets.
Hot stamping technology The holographic hot stamping technology is one of the safer and successful anti-counterfeiting methods that have been certified worldwide. The hologram hot stamping process uses holograms in large quantities. The holograms stamped on the substrate are very thin, and The printed matter is integrated into one body, and it complements the printed patterns and colors on it to obtain a good visual effect. According to different hot stamping processes, holographic hot stamping can be roughly divided into three types, namely low-speed holographic hot stamping, rapid chaos holographic hot stamping and high-speed positioning holographic hot stamping. Among them, the high-speed positioning holographic hot stamping technology has the highest requirements and the strongest anti-counterfeiting efforts. It is necessary to ensure that the hologram is completely and accurately stamped on the specified position under high production efficiency, and the positioning accuracy is not less than ± 0.25mm. The holographic positioning hot stamping adopts corresponding anti-counterfeiting patterns, and the process is special. It uses holographic positioning probes to accurately control the anodized aluminum, and the quality of the bronzing is high, and consensus has been reached worldwide. Because holographic anodized aluminum is more difficult to manufacture, there are fewer manufacturers, and the process is complicated, so the cost is higher.
Cold bronzing technology is a brand-new bronzing process that does not require the use of heated metal silver plates. Instead, the adhesive is directly applied to the decorated graphics and texts, so that the anodized aluminum is attached to the surface of the printed matter. Cold bronzing is usually processed by rounding and rounding. The bronzing speed is fast, but the surface effect and firmness of bronzing are poor, so the printed matter also needs glazing or film processing. The cold bronzing process has low cost, saves energy, and has high production efficiency. At present, some tobacco factories on the market have cancelled the paper packaging of cigarette pack boxes, and replaced the box packaging with color film to reduce the packaging cost. Using cold bronzing technology, you can make hot bronzing-like effects on paper and film, increasing the appeal of cigarette packets.
Printing first and then printing is a new idea in the printing industry and cigarette label design. Hot stamping first is to stamp silver foil on white cardboard first, and then print graphics on the surface of the silver foil stamping, which is a large area hot stamping technology. This processing method usually uses a round flattening or round flattening hot stamping machine. The pressure is linear contact during hot stamping. In large area hot stamping, unlike the flat flat hot stamping, bubbles will appear, and the hot stamping surface is very smooth. At the same time, full-plate hot stamping will not increase the load on the machine.
Three-dimensional bronzing is a process of making bronzing and concave-convex graphics and text by using corrosion or engraving technology to form a female mold and a male mold that match up and down to achieve the process of bronzing and pressing concave and convex at once. This process simultaneously completes bronzing and embossing, reducing the waste products caused by the inaccurate overprinting of the processing procedure, and improving the production efficiency and product quality. Three-dimensional bronzing often uses bronzing and embossing materials with high resolution. Viewing pictures and text at different angles can show different colors, achieving ideal anti-copying and anti-counterfeiting functions. Cover the subtle layers of the picture and text to avoid the document being tampered and forged. Three-dimensional bronzing can use flat flattening, round flattening and round flat round bronzing die-cutting machines. The bronzing uses corroded copper plate or engraved brass plate. Corrosion red copper plate is used for flat bronzing, and the service life is short, generally 100,000 times, while the service life of engraved brass plate can reach 1 million times, suitable for long-run work, and the quality of bronzing is good.
Engraved gravure technology Advanced engraved gravure plate-making and printing technology to print the finished product, the line ink layer is thick, the color is thick, the line lines protruding on the paper have a certain gloss, and some of the patterns are particularly convex, using touch This traditional way of feeling is very easy to identify raised gravure patterns. Simply touch the pattern with your fingertip to confirm its feel. At the same time, its obvious bulge, thick and vivid colors and fine continuous lines will give people a different sense of vision. It is these appearance effects that cannot be reproduced by ordinary offset printing that embody its anti-counterfeiting value. Engraved gravure is not only a traditional technology for security defense, but also an effective and reliable carrier for machine-readable features such as magnetism and infrared absorption.
New screen printing technology Screen printing has the characteristics of thick ink layer, rich graphic layers, strong three-dimensional sense, wide printing materials, etc. The application in high-end tobacco and alcohol, food packaging cartons is gradually increasing. The use of UV screen ink to print matte, refracted, ice, wrinkle and other effects on the cigarette case has greatly stimulated consumers' desire to buy. However, due to the low printing speed of flat screen printing, slow curing speed of ink, difficult to control printing quality, and large consumption of printing materials, it cannot meet the needs of cigarette carton scale and mass production. High-speed rotary screen printing production line, fast printing speed, high productivity, stable print quality, low consumption, changed the traditional flat screen printing screen manual paper supply, ink supply method, suitable for high-speed automatic, large-scale mass production beautifully folded Tray.
Web-fed rotary screen printing uses a nickel metal round screen printing plate, a built-in doctor blade and an automatic ink supply system. The doctor blade transfers the printing ink from the round screen plate to the surface of the substrate supported by the impression cylinder. The entire printing process from paper feed, ink supply, color registration, UV drying, etc. are all fully controlled by the computer. The round screen printing plate is electroformed, and the mesh hole is a hexagonal wire hole. The entire mesh surface is flat and even to ensure the stability and precision of the imprint. Therefore, reel-to-roll screen printing can not only meet the requirements of special effects such as frosting, ice blossoms, etc., but also online hot stamping holographic anti-counterfeiting signs, embossing, die-cutting, and easy to realize high-speed automatic printing carton. Since the round pressing and hot stamping and die cutting are line contacts, the line pressure during die cutting is much lower than the flat contact pressure, so that the equipment power is small and the stability is good. Due to the continuous rolling die cutting, the production efficiency is high, and the maximum die cutting speed can reach 350 meters per minute. The circular pressure die cutting machine is equipped with a high-precision registration device and a die cutting phase adjustment device, which can obtain a very high die cutting Precision.
Special gloss printing Special gloss printing is a new 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 apply silver paste on the surface of the printed product, and then use very 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 graphics on a printed product with a certain pressure to produce light refraction. 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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