Aluminum foil can be divided into thick foil, single zero foil and double zero foil according to the difference in thickness.
① Thick foil ("heavy gaugefoil"): foil with a thickness of 0.1 to 0.2mm.
② Single zero foil ("medium gauge foil"): Foil with a thickness of 0.01mm and less than 0.1mm/.
③ Double zero foil ("light gauge foil"): The so-called double zero foil is a foil with two zeros after the decimal point when its thickness is measured in mm, usually an aluminum foil with a thickness less than 0.01, that is, an aluminum foil with a thickness of 0.005~0.009mm . In foreign countries, aluminum foil with a thickness of ≤40ltm is sometimes referred to as "light gauge foil", and aluminum foil with a thickness of > 40btm is collectively referred to as "heavy gauge foil".