The bronzing process utilizes the principle of hot press transfer to transfer the aluminum layer in the anodized aluminum to the surface of the substrate to form a special metal effect. The main material used for bronzing is an electrochemical aluminum foil, so bronzing is also called anodized aluminum hot stamping. The electrochemical aluminum foil is usually composed of a plurality of materials, the substrate is often P E, followed by a separation coating, a color coating, a metal coating (aluminum plating), and a glue coating.
In the printing industry, it is commonly used to stamp electro-chemical aluminum foil on paper, which is called bronzing. Hot stamping is a general term for a process. Hot stamping does not mean that it is gold when it is hot. There are many kinds of bronzing paper materials, including gold, silver, laser gold, laser silver, black, red, green and so on.
1. Ordinary gold, laser gold hot stamping. It can be used in most products, including gold, silver, laser and glass cards, and its application is more common.
2. Positioning holographic bronzing. Holographic laser positioning of electrochemical aluminum is a special process application in design, with a corresponding anti-counterfeiting pattern, which can greatly improve the anti-counterfeiting ability of the product, and at the same time improve the grade of the product. This kind of anodized aluminum is generally produced domestically. Compared with foreign imports, the price is relatively cheap, but the bronzing performance is slightly worse. Holographic laser positioning of aluminum has a great relationship with bronzing temperature, bronzing pressure and speed, and even bronzing models.
3. Special application of electrochemical aluminum in the process. The first hot stamping is a new idea in the design of the cigarette label and the printing industry. The application of this process has high requirements for anodized aluminum. In addition to the accurate position of the bronzing, smooth and bright surface, balanced pressure, uniformity, no foaming, no paste, etc., it is also necessary to pay special attention to the edge of the bronzing pattern. Trace, bronzing aluminum has good adhesion on the hot stamping surface, and no obvious wiping and scratching. As everyone knows, the hot stamping process is actually a process in which the paper is heated and stressed. For white cards and glass cards, special attention should be paid to the protection of semi-finished products. In the production process, various unfavorable factors of paper deformation should be minimized. This will facilitate the smooth process of bronzing and improve the product qualification rate.