This part of GB/T 22638 specifies the method for determining the thickness of aluminum foil by gravimetric method. This section applies to the thickness determination of aluminum foil with a thickness not greater than 0.05mm.
GB/T 22638.1-2008 history
2016GB/T 22638.1-2016 Test methods for aluminium and aluminium alloy foils—Part 1: Determination of thickness
2008GB/T 22638.1-2008 Test methods for aluminium and aluminium alloy foils.Part1:Determination of thickness by gravimetric method