Methods of test for pulp and paper, Method 447: Determination of air permeance (medium range) – Sheffield method

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AS/NZS	10/18/2016	13

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AS/NZS 1301.447 – Methods of test for pulp and paper, Method 447: Determination of air permeance (medium range) – Sheffield method

Adopts ISO 5636-4:2013, which specifies the Sheffield method for determining the air permeance of paper and board using the Sheffield apparatus. It is applicable to papers and boards which have air permeances between 0.02m/(Pa.s) and 25m/(Pa.s) when tested with the Sheffield apparatus. It is unsuitable for rough-surfaced materials, which cannot be securely clamped to avoid leakage.