There are two main shapes of aluminum foil: roll and sheet. In the deep processing of aluminum foil, most aluminum foil is supplied in roll form, and sheet aluminum foil is only used in some handicraft packaging occasions.
Aluminum foil can be divided into hard foil, semi-hard foil and soft foil according to the state.
Hard foil: Aluminum foil that has not been softened (annealed) after rolling. If it is not degreased, there will be residual oil on the surface. Therefore, rigid foil must be degreased before printing, lamination, and coating.
If used for forming processing, it can be used directly.
Semi-rigid foil: The hardness (or strength) of aluminum foil is between hard foil and soft foil, and is usually used for forming processing.
Soft foil: Aluminum foil that has been fully annealed after rolling. The material is soft and there is no residual oil on the surface. In most application areas, such as packaging, lamination, electrical materials, etc., flexible foils are used.
