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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

Mar 1, 2021

General information

90.20     Jan 15, 2026

ISO

ISO/TC 6/SC 2

International Standard

85.060  

English  

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Scope

This document 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/(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.

Life cycle

PREVIOUSLY

WITHDRAWN
ISO 9932:1990

NOW

PUBLISHED
ISO 9932:2021
90.20 Standard under periodical review
Jan 15, 2026

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