How to distinguish single zero foil from double zero foil?

Aluminum foil is a kind of aluminum rolling material. aluminium foil is mainly for thickness. In the industry, aluminum products with a thickness of less than 0.2mm are usually called aluminum foil. Simul, according to the thickness, aluminum foil can be divided into double zero foil, single zero foil and thick Foil, so do you know how to distinguish between single zero foil and double zero foil?

This is easy to distinguish, just look at the thickness, single zero foil: foil with a thickness of 0.01mm and less than 0.1mm, double zero foil: the so-called double zero foil means that there are two zeros after the decimal point when the thickness is measured in mm foil, usually aluminum foil less than .0075 mm in thickness.