Postpress stamping process application

With the rapid development of hot stamping foil and packaging industry, the application of anodized aluminum foil is more and more widely used. Such as: book cover bronzing, gift box bronzing, cigarettes, wine, clothing trademarks and boxes of hot stamping, greeting cards, invitations, pen bronzing, etc., its color and pattern, can also be customized according to specific requirements. The substrate for hot stamping includes general paper, ink printing paper such as gold and silver ink, plastic (PE, PP, PVC, engineering plastics such as ABS, etc.), leather, wood and other special materials.
The anodized aluminum hot stamping foil mainly uses heat and pressure to transfer the pattern or text to the surface of the hot stamped material. To complete this process, you need a stamping machine, a template with special text or graphics (such as zinc plate, copper plate, etc.), heated to the required temperature, transfer the required pressure and maintain the corresponding elbow. It should be noted that when hot stamping different materials, the appropriate type of anodized aluminum should be selected, and the appropriate temperature, pressure and hot stamping time should be selected to achieve the desired hot stamping effect.
The main characteristics, specific applications and matters needing attention in the use of anodized aluminum:
Hot stamping features:
The pattern is clear and beautiful, the color is dazzling, wear-resistant and weather-resistant. On the printed cigarettes, the application of bronzing technology accounts for more than 85%. In the flat design, hot stamping can play a finishing touch and highlight the design theme, especially for trademarks and registered names, the effect is more remarkable.
Product application:
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 electrochemical aluminum has a great relationship with the control of bronzing temperature, bronzing pressure and vehicle 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 the 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 pressurized. 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, so that the smooth progress of the hot stamping process and the improvement of the product qualification rate can be very helpful.
In the application of the bronzing process, it will encounter problems in how to improve work efficiency in production, especially for the process improvement of large-volume products.
For example, in the printing of the boutique "Red Three Rings" clamshell small box of cigarettes, the original production process requires offset printing and hot stamping. After changing to new materials, it can be offset and oiled once and then bronzing. Reduce the number of processes in offset printing to avoid the phenomenon of paper die-cutting (reducing the effect of ultraviolet radiation), greatly improving production efficiency, reducing scrap rate and reducing the number of processes without affecting the normal operation of bronzing. Bad effects on the production of other products.
Directly bronzing on the surface of UV varnish, the process itself has a very high requirement for UV varnish and bronzing aluminum. When varnish coating, it is necessary to pay attention to the amount of oil control, and try to ensure the relative varnish coating of the whole batch of products. Stable, and the oil layer should be thin and flat; for the anodized aluminum used for bronzing, it is required to have high temperature resistance, good adhesion, and good bronzing suitability with varnish (resin used in varnish) The type matches the hot melt adhesive in the gilded anodized aluminum). In all products, the range of application of this process is relatively small. In addition, bronzing on gold, silver ink and dumb oil also has high requirements on bronzing surface and bronzing anodized aluminum. Or the surface is rough, it will directly affect the normal operation of bronzing.
Matters needing attention 1. The appropriate hot stamping foil must be selected according to the different types of the object to be burned. When hot stamping, you must master the three-way cooperation of temperature, pressure and hot stamping speed, and it will be different according to the hot stamping material and hot stamping area.
2. You should master the speed and direction of the turning tool when cutting.
3. Electro-aluminum hot stamping foil should use paper, ink (especially black ink), kerosene and composite glue with suitable properties. The hot stamping must be kept dry to avoid oxidation or damage of the bronzing layer.
4. The general packaging is: 0.64×120m one roll, one box for every 10 rolls; the customizable width is 0.64m, the length is 240m or 360m large roll or other special specifications.
5. Store under pressure, moisture, heat, and sun protection. Store in a cool, well-ventilated place.

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