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ISO 9932:2021
M00001691
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ISO 9932:2021 Paper and board - Determination of water vapour transmission rate of sheet materials - Dynamic sweep and static gas methods
standard by International Organization for Standardization, 03/01/2021
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ISO 9932:2021 describes general test methods for determining the water vapour transmission rate of sheet materials by means of a dynamic gas method or a static gas method. Depending on the method and specific apparatus employed, materials up to 38 mm thick and with water vapour transmission rates in the range from 0,05 g/(m2d) to 65 g/(m2d) can be tested. The basis of the function of the instrumental techniques is briefly described. Advice on calibration is given in Annex B.