This part of GB/T 22638 specifies the detection method for pinholes in aluminum foil. This section applies to the detection of the number and diameter of aluminum foil pinholes. This section is also applicable to the detection of aluminum foil roll hole diameter.
GB/T 22638.2-2016 Referenced Document
GB/T 26492.4-2011 Defects for wrought aluminium and aluminium alloys ingots and products.Part 4:Defects for foils
GB/T 8170 Rules of rounding off for numerical values & expression and judgement of limiting values
GB/T 22638.2-2016 history
2016GB/T 22638.2-2016 Test methods for aluminium and aluminium alloy foils—Part 2: Determination of pinhole
2008GB/T 22638.2-2008 Test methods for aluminium and aluminium alloy foils.Part 2:Determination of porosity