This document specifies a method for determining the water-vapour transmission properties of coatings of paints@ varnishes and related products. It supplements ISO 12572. As far as possible@ the procedure@ the definitions and the calculations have been taken over from ISO 12572. ISO 12572 can be consulted@ if necessary@ to obtain a better understanding of the procedure specified in this document. Water-vapour transmission rates of more than 680 g/(m2?d) (i.e. water-vapour diffusion-equivalent air layer thicknesses@ sd@ of less than 0@03 m) are not accurately quantified by the test method described in this document.
EN ISO 7783:2018 history
2018EN ISO 7783:2018 Paints and varnishes - Determination of water-vapour transmission properties - Cup method
2011EN ISO 7783:2011 Paints and varnishes - Determination of water-vapour transmission properties - Cup method (ISO 7783:2011)