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BS 7406:1991

BS 7406:1991

$86.31

Methods for determination of water vapour transmission rate of sheet materials (paper and board) by dynamic sweep and static gas methods

Published By Publication Date Number of Pages
BSI 1991 14
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This International Standard 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 0,05 g/(m2 · d) to 65 g/(m2 · d) can be tested. The basis of the function of the instrumental techniques is briefly described. Advice on calibration is given in Annex B.

Can measure WVTR’s as low as 0.05 g/(m2.d) and be used on materials up to 38 mm thick.

BS 7406:1991
$86.31