Paper and board. Determination of air permeance (medium range) - Sheffield method Ingestion-build-89079 Rules governing the contents and

Rules governing the contents and presentation of the detailed specifications

WARNING — Use of this document may involve hazardous equipment

absorption

It is intended to be used in conjunction with each of those parts of ISO 3691

pumping or "pigging" stations

Paper and board. Determination of air permeance (medium range) - Sheffield method Ingestion-build-89079 Rules governing the contents and1 Scope This part of ISO 5636 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 0,02 m (Pas) and 25 m (Pas) when tested with the Sheffield apparatus. It is unsuitable for rough surfaced materials, which cannot be securely clamped to avoid leakage.