BS 3900 : 1996 Methods of test for Paints Part G9. Determination of water-vapour transmission rate of free films (dish method)
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This part of ISO 7783 specifies a method for the determination of the water-vapour transmission rate of an unsupported film of paint, varnish or related product. The test method is applicable to the transmissionuct. The test method is applicable is applicable to the tranmission of water vapour in either direction through a paint film.