5633 International Standard (ISO INTERNATIONAL ORGANIZATION FOR STANDARDIZATION·MEXAYHAPOAHAR OPTAHW3AUMA HO CTAHAAPTM3AUWW-ORGANISATION INTERNATIONALE DE NORMALISATION Paper and board - Determination of resistance to water penetration Papier et carton - Deétermination de la resistance a la penetration de I'eau First edition - 1983-11-15 UDC 676.3/.7 : 620.165.29 Ref.No. ISO5633-1983(E) Descriptors:papers,paperboards,tests,waterresistancetests. Price based on 3 pages ited without license from IHS Not for Resale Foreword Iso (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of developing International interested in a subject for which a technical committee has been authorized has the right to be represented on that committee. International organizations, governmental and non-governmental,in liaison withisO,alsotake part inthe work. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by theISO Council. Paper, board and pulps, and was circulated to the member bodies in November 1982. It has been approved by the member bodies of the following countries : Australia Finland Romania Austria France South Africa, Rep. of Belgium Germany, F.R. Spain Brazil India Switzerland Bulgaria Italy Tanzania Canada Kenya Thailand Chile Korea, Rep. of Turkey China Mexico United Kingdom Czechoslovakia New Zealand USA Egypt, Arab Rep. of Norway Venezuela The member body of the following country expressed disapproval of the document on technical grounds : Sweden InternationalOrganizationforStandardization,1983 Printed in Switzerland ted without license from IHS Not for Resale INTERNATIONALSTANDARD ISO5633-1983 (E) Paper and board - Determination of resistance to water penetration 1 Scope 7 Apparatus (see figures 1 and 2) This International Standard specifies a method for the deter. NOTE - The dimensions quoted in 7.1 to 7.3 apply to apparatus as mination of the resistance of paper and board to water pene- tration under standard conditions. system illustrated in figure 1 are also suitable 7.1 Cylindrical metal cup, having an internal diameter of 2 Field of application 112,8 ± 0,2 mm and an external diameter of approximately The method is applicable to papers and boards which have a tap. been rendered water resistant or waterproof. They may have been rendered waterproof by internal sizing, by surface sizing, 7.2 Annular metal ring, with an internal diameter of by coating, or by lamination using waterproof laminants, or by 112,8 ± 0,2 mm, an external diameter of approximately any other method. 170 mm and approximately 10 mm thick. The method is not suitable for corrugated fibreboard but may 7.3 Two rubber gaskets, each with an internal diameter of be applied to the components of such boards. 112,8 ± 0,2 mm and an external diameter of approximately 170 mm. 3 References 7.4 Means of clamping the ring to the cup, with the iso 186, Paper and board - Sampling for testing. gaskets between, to give a leakproof seal. Iso 187, Paper and board - Conditioning of samples. 7.5 Manometer, allowing a pressure of up to 1 000 mm head of water to be applied. 4 Definition 7.6 Timing device. For the purpose of this International Standard, the following definition applies: Sampling resistance to water penetration: That property of paper or Sampling shall be carried out in accordance with ISo 186. No board which retards the passage of water from one surface of creases, obvious flaws nor prints shall be included in the test the paper or board to the other surface. area. 5Principle 9 Preparation of the test pieces Sufficient test pieces, each measuring 175 mm × 175 mm, Measurement of the time taken for penetration of the paper or shall be cut from each specimen to permit at least two valid board under a static head of water under the conditions determinations to be made. Test pi