The 20 micron aluminium foil is thickness of 20 micrometers, which is also known as 0.02mm aluminium foil. Generally speaking, there is no distinction between thin and thick aluminum foil used in household application. Theoretically, the processing thickness of aluminum foil is required to be below 0.025mm, or 25 micrometers. The normal thickness of aluminum foil for food packaging on the market is approximately …