Brief introduction of hot stamping technology for packaging and post-printing special printing
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Holographic hot stamping technology is one of the safer and more successful anti-counterfeiting methods that have been certified worldwide. The holographic hot stamping process applies holograms in large quantities. The holograms printed on the substrates are very thin and melt with the substrates. As one, it can get a good visual effect with the printed patterns and colors on it. According to different hot stamping processes, holographic hot stamping can be roughly divided into three types, namely low-speed holographic hot stamping, fast chaotic 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 highest anti-counterfeiting strength. It is necessary to ensure that the hologram is completely and accurately stamped at a specified position under high production efficiency, and the positioning accuracy is not less than ±0.25 mm. The holographic positioning hot stamping adopts the corresponding anti-counterfeiting pattern, and the process is special. It uses the holographic positioning probe to precisely control the electrochemical aluminum, and the quality of the bronzing is high, which has been recognized worldwide. Since holographic electrochemical aluminum is difficult to manufacture, the number of manufacturers is small, and the process is complicated, so the cost is high.
Cold bronzing technology is a brand new bronzing process that does not require the use of a heated metal silver plate. Instead, the adhesive is applied directly to the decorative graphic to allow the anodized aluminum to adhere to the printed surface. Cold bronzing is usually formed by circular pressing, and the bronzing speed is fast, but the bronzing surface effect and firmness are poor, so the printed matter needs to be glazed or coated. 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 the cigarette packet box, and replaced the color box with the color box to reduce the packaging cost. Using cold stamping technology, you can create a similar hot stamping effect on paper and film to increase the appeal of the cigarette pack.
The first hot stamping is a new idea in the printing industry and cigarette label design. First hot stamping is to first print the silver foil on the white cardboard, and then print the graphic on the surface of the hot stamping silver foil, which is a large-area hot stamping technology. This kind of processing method usually adopts round flattening or round pressing and bronzing machine. When hot stamping, the pressure is line contact. When printing on a large area, unlike ordinary flat stamping, bubbles will appear, and the hot stamping surface is very flat. At the same time, full-page hot stamping does not increase the load on the machine.
The three-dimensional bronzing is a process of embossing or embossing the embossing and embossing by using the etching or engraving technique to realize the process of bronzing and pressing. This process simultaneously completes bronzing and embossing, reduces waste generated by inaccurate processing, and improves production efficiency and product quality. Stereo stamping often uses a high-resolution gilt embossing material, which can display different colors at different angles, achieving ideal anti-copy and anti-counterfeiting functions. Cover the subtle levels of the text to avoid tampering and forgery of the file. The three-dimensional bronzing can be flat flattened, round flattened and round pressed round bronzing film cutting machine, and the bronzing is made of corroded copper plate or engraved brass plate. Corrosion copper plate is used for flat bronzing, the service life is short, generally 100,000 times, and the engraved brass version can reach 1 million times of service life, suitable for long-running, and the quality of bronzing is good.