Sheet materials. Determination of water vapour transmission rate (WVTR). Gravimetric (dish) method Ingestion-build-44680 For the interpretation of documents

For the interpretation of documents such as datasheets

Parallel screw threads of Whitworth form BS 84

ISO 2808 consistently enumerates the individual coatings applied in a multi-layer system by referring to the first coating applied on the substrate as coating 1

that requires the use of a weighbridge and crane

Sheet materials. Determination of water vapour transmission rate (WVTR). Gravimetric (dish) method Ingestion-build-44680 For the interpretation of documents1 Scope This document specifies a method for the determination of the water vapour transmission rate (often erroneously called permeability) of sheet materials. This method is not generally recommended for use if the transmission rate is expected to be less than 1 g m2 per day or for materials thicker than 3 mm. In such cases the method specified in ISO 9932 is preferred. The method cannot be applied to film materials that are damaged by hot wax or