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In terms of thickness, the aluminum foil can be divided into thick sheet, single zero sheet and double zero sheet.

1. Thick sheet (thick sheet): aluminum sheet with a thickness of 0.1 to 0.2 mm.

2. Single zero foil (medium sheet): aluminum sheet with a thickness not exceeding 0.1 mm.

3. Double zero foil: Aluminum foil with a thickness of millimeters has two zeros after the decimal point, generally less than 0.01 mm and 0.005 to 0.009 mm.

In terms of shape, aluminum foil can be divided into rolled aluminum foil and aluminum foil sheet. Most of the deep processing of aluminum foil is done by lamination, and only on some occasions the crafts are packed with aluminum foil.

Depending on the state, aluminum foil can be divided into hard paper, semi-rigid paper and soft paper.

1. Rigid aluminum foil: Aluminum foil does not soften (anneal) or degrease after rolling, and the surface of the fabric is poor. Therefore, the hard sheet must be degreased before printing, gluing and coating. If used for molding, it can be used directly.

2. Semi-rigid aluminum foil: aluminum sheet with hardness (or resistance) between the hard sheet and the soft sheet, generally used for forming processing.

3. Flexible packaging aluminum foil: after being completely annealed, the aluminum sheet is rolled and softened, the material is soft and there is no residual oil on the surface. Most applications, such as packaging, composites, electrical materials, etc.