What is the double zero aluminum foil(lightgaugefoil)？

Aluminum foil can be divided into thick foil, single zero foil and double zero foil according to thickness difference.
① Thick foil: the thickness of 0.1 ~ 0.2mm foil.
② Single zero foil: the thickness of 0.01mm and less than 0.1mm/foil.
③ Double zero foil: The so-called double zero foil is the foil with two zeros after the decimal point when its thickness is measured in mm, usually the aluminum foil with a thickness of less than 0.0075mm. When expressed in English, thick foil is called "heavy gaugefoil", single-zero foil is called "medium gaugefoil", and double-zero foil is called "lightgaugefoil". Sometimes, aluminum foil with thickness ≤40ltm is called light gaugefoil, and aluminum foil with thickness >40btm is collectively referred to as heavy gaugefoil.

Double zero aluminum foil is relatively thin, mainly used in the packaging industry, such as food packaging, cigarette packaging and so on.