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


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.

General Information

RS ISO 7783: 2018ADOPTED ISO STANDARDSPaint and colour industries27Second Edition
Jun 2023
Price: RWF 27,000

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