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    GB/T 22638.4-2016
    Test methods for aluminium and aluminium alloy foils—Part 4：Determination of surface wetting tension

    GB/T 22638.4-2016 "Test methods for aluminium foil - Part 4: Determination of surface wetting tension" specifies the method for determining the surface wetting tension of aluminium foil. The commonly used principle is the liquid coating method, which involves drawing lines on the aluminium foil surface using a series of standard surface tension test inks. By observing the time it takes for the ink lines to contract or remain stable, the corresponding surface wetting tension value can be determined. This method is used to assess the surface cleanliness and treatment effectiveness of aluminium foil.

    This summary is not the original standard text and is for reference only. For accurate information, please obtain it through official channels.
    Status Active
    CCS H20 ICS 77.040.01
    Release Date 2016-12-13 00:00:00 Implementation Date 2017-11-01 00:00:00

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