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1.1 These test methods cover the determination of water vapor transmission (WVT) of materials through which the passage of water vapor may be of importance, such as paper, plastic films, other sheet materials, fiberboards, gypsum and plaster products, wood products, and plastics. The test methods are limited to specimens not over 1 ¼ in. (32 mm) in thickness except as provided in Section 9. Two basic methods, the Desiccant Method and the Water Method, are provided for the measurement of permeance, and two variations include service conditions with one side wetted and service conditions with low humidity on one side and high humidity on the other. Agreement should not be expected between results obtained by different methods. That method should be selected which more nearly approaches the conditions of use.

1.2 The values stated in inch-pound units are to be regarded as the standard. Metric inch-pound conversion factors for WVT, permeance, and permeability are stated in Table 1. All conversions of mm Hg to Pa are made at a temperature of 0°C.

1.3 This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

 

Document History

  1. ASTM E96/E96M-24


    Standard Test Methods for Gravimetric Determination of Water Vapor Transmission Rate of Materials

    • Most Recent
  2. ASTM E96/E96M-23


    Standard Test Methods for Gravimetric Determination of Water Vapor Transmission Rate of Materials

    • Historical Version
  3. ASTM E96/E96M-22ae1


    Standard Test Methods for Gravimetric Determination of Water Vapor Transmission Rate of Materials

    • Historical Version
  4. ASTM E96/E96M-22a


    Standard Test Methods for Gravimetric Determination of Water Vapor Transmission Rate of Materials

    • Historical Version
  5. ASTM E96/E96M-22


    Standard Test Methods for Gravimetric Determination of Water Vapor Transmission Rate of Materials

    • Historical Version
  6. ASTM E96/E96M-21


    Standard Test Methods for Gravimetric Determination of Water Vapor Transmission Rate of Materials

    • Historical Version
  7. ASTM E96/E96M-16


    Standard Test Methods for Water Vapor Transmission of Materials

    • Historical Version
  8. ASTM E96/E96M-15


    Standard Test Methods for Water Vapor Transmission of Materials

    • Historical Version
  9. ASTM E96/E96M-14


    Standard Test Methods for Water Vapor Transmission of Materials

    • Historical Version
  10. ASTM E96/E96M-13


    Standard Test Methods for Water Vapor Transmission of Materials

    • Historical Version
  11. ASTM E96/E96M-12


    Standard Test Methods for Water Vapor Transmission of Materials

    • Historical Version
  12. ASTM E96/E96M-10


    Standard Test Methods for Water Vapor Transmission of Materials

    • Historical Version
  13. ASTM E96/E96M-05


    Standard Test Methods for Water Vapor Transmission of Materials

    • Historical Version
  14. ASTM E96-00e1


    Standard Test Methods for Water Vapor Transmission of Materials

    • Historical Version
  15. ASTM E96-00

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    Standard Test Methods for Water Vapor Transmission of Materials

    • Historical Version