The main material for hot stamping is electroplated aluminum, also called hot stamping foil. It is mainly composed of two thin layers, namely the polyester film substrate and the transfer layer. During hot stamping, the transfer layer is pressed on all or part of the surface of the substrate by heat and pressure. When the hot stamping is completed, the polyester film edge is torn off together with the untransferred part.

The hot stamping process is divided into four steps:

1. The hot stamping foil contacts the substrate;

2. With heat and pressure, the heat transfer layer is melted and transferred to the surface of the substrate;

3. Remove the pressure and peel off the polyester film;

4. Feed the hot stamping foil and replace it with the substrate to be hot stamped.

The perfect hot stamping effect mainly depends on the level of coordination between temperature, pressure and hot stamping time. In addition, it is also necessary to consider whether the substrate, hot stamping machine, hot stamping machine fixture and pad are suitable. Finally, it is necessary to study the environmental conditions, including indoor temperature, substrate temperature, indoor air cleanliness (dust content), temperature, etc.

1. Hot stamping foil, there are two categories: roll foil and single sheet foil. Roll foil can be divided into different models according to the substrate. The hot stamping suitability between anodized aluminum and the substrate, speed, temperature, pressure, hot stamping plate quality, plate mounting and padding technology, anodized aluminum tension adjustment, hot stamping machine condition and many other factors affect the hot stamping suitability speed, temperature and pressure. The hot stamping suitability speed, temperature and pressure are the most important. The performance of various types of anodized aluminum is different, and the suitable substrates are also different.

2. Hot stamping temperature. If the hot stamping temperature is too high, the hot stamping mark will lose its metallic luster and bubble, the edge will be unclear or even the plate will be smeared. If the hot stamping temperature is too low, it will be impossible to hot stamp, the hot stamping will not be firm or the handwriting will be hairy.

3. Hot stamping pressure. If the hot stamping pressure is too high, it will cause the plate to be smeared or the handwriting to become smeared. If the hot stamping pressure is too low, the hot stamping foil and the substrate cannot be adhered, and the hot stamping part of the hot stamping foil cannot be sheared. The installation of the hot stamping foil should not be too tight or too loose. If it is too tight, the writing will be missing strokes, and if it is too loose, the writing will be unclear and fuzzy.

4. Hot stamping speed. The hot stamping speed actually reflects the contact time between the substrate and the hot stamping foil during hot stamping, which directly affects the hot stamping fastness. If the hot stamping speed is too fast, it will cause the hot stamping to fail or the imprint to be blurred; if the hot stamping speed is too slow, it will affect both the hot stamping quality and the production efficiency.

Speed, pressure, and temperature restrict each other during the hot stamping process, and its process parameters are always determined in the order of hot stamping speed, pressure, and temperature. First determine the hot stamping speed. Under normal circumstances, it is treated as a constant and not easily changed. Then find the hot stamping pressure and hot stamping temperature that are suitable for it. In this way, the operating procedures can be simplified and the hot stamping quality can be easily controlled.

5. Hot stamping machine. According to the hot stamping method, the hot stamping machine can be divided into three types: flat-pressed flat, round-pressed flat, and round-pressed round; according to the position of the hot stamping plate, the hot stamping machine can be divided into vertical and horizontal.

6. Printing materials, hot stamping materials are also called printing materials. The printing materials for hot stamping of printed materials include offset paper, coated paper, white cardboard (cardboard), cloth paper, varnished cloth, plastic products, etc.

In addition, resin plates can also replace copper-zinc plates for hot stamping. As long as the temperature and pressure are well matched, good products can be hot stamped. 1) Temperature control is very critical. It is directly related to the quality of hot stamping. If the temperature is too high, the resin plate will be burned. The hot stamping foil will also produce adhesion due to the temperature, and the hot stamped words will be blurred. The temperature should be determined according to the quality of the tree plate. 2) Since the resin plate is tough, it is not necessary to use too much pressure, and the hot stamped words will be very clear. 3) It is best to use double-sided tape to fix the resin plate. This tape will not affect the heat insulation and is easy to control the temperature.

The operator of the hot stamping machine must concentrate, work with hands and feet simultaneously, and keep a certain distance from the hot stamping heating plate to avoid accidents. For machine adjustment, please read the random instruction manual carefully.