ISO 7783:2018 PDF

Scope: 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.

ISO 7783:2018 Referenced Document

ISO 1513:2010 Paints and varnishes - Examination and preparation of test samples
ISO 15528:2013 Paints, varnishes and raw materials for paints and varnishes.Sampling
ISO 2808:2007 Paints and varnishes - Determination of film thickness
ISO 3233-1:2013 Paints and varnishes - Determination of the percentage volume of non-volatile matter - Part 1: Method using a coated test panel to determine non-volatile matter and to determine dry film density by the Archimedes principle
ISO 3696:1987 Water for analytical laboratory use; Specification and test methods
ISO 4618:2014 Paints and varnishes - Terms and definitions

2018 ISO 7783:2018 Paints and varnishes - Determination of water-vapour transmission properties - Cup method
2011 ISO 7783:2011 Paints and varnishes - Determination of water-vapour transmission properties - Cup method