Most recent
ISO 5633:1983
Paper and board -- Determination of resistance to water penetration
Is applicable to papers and boards which have been rendered water resistant or waterproof by internal sizing, by surface sizing, by coating, or by lamination using waterproof laminants , or by any other method, and is not suitable for corrugated fibreboard by may be applied to components of such board.
International Organization for Standardization [iso]