Aluminum foil is a hot stamping material which is directly calendered into a thin sheet of metal aluminum. Its hot stamping effect is similar to that of pure silver foil stamping, so it is also called fake silver foil. Since aluminum foil has a soft texture and good ductility, it has a silvery white luster. If the calendered sheet is smashed on an offset paper with a material such as sodium silicate, an aluminum foil sheet can be formed.
However, the aluminum foil itself is easily oxidized and the color is darkened, and friction, touch, and the like are discolored, and thus it is not suitable for hot stamping of a book cover that has been preserved for a long time. In order to improve rolling efficiency and quality of aluminum foil products, modern aluminum foil rolling mills are developing in four directions: large volume, wide width, high speed and automation. The width of the roll of the contemporary aluminum foil rolling mill has reached 2200mm or more, the rolling speed has reached 2000m/min or more, and the coil weight has reached 20t or more.