Aluminum foil, a kind of metal aluminum directly rolled into thin sheet hot stamping material, its hot stamping effect is similar to that of sterling silver foil, so it is also called false silver foil. Due to the soft texture of aluminum, good ductility, with a silver luster, if the rolled sheet is mounted on offset paper with sodium silicate and other substances to make aluminum foil sheet, it can also be printed. But the aluminum foil itself is easy to oxidize and dark, friction, touch and other will fade, so it is not suitable for long-term preservation of book cover and other hot stamping