Water vapour permeability of leather is evaluated by clamping a circular test specimen over the mouth of a bottle containing a solid desiccant and subjecting it to a rapid current of air. The air inside the bottle is circulated by keeping the desiccant in motion. The increase in weight of the bottle over a specified interval of time gives the quantitative measure of the water vapor permeability of the leather sample under test.
- IUP/25 : Official Method of International Union of Leather Chemists Society.
- IS : 15298 (Part-2) : Methods of Physical Testing of Leather
- ISO : 8782-1 : 1998
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