NF EN ISO 7783

NF EN ISO 7783

November 2018
Standard Current

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.

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Main informations

Collections

National standards and national normative documents

Publication date

November 2018

Number of pages

30 p.

Reference

NF EN ISO 7783

ICS Codes

87.040   Paints and varnishes

Classification index

T30-018

Print number

1

International kinship

ISO 7783:2018

European kinship

EN ISO 7783:2018
Sumary
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.

Replaced standards (1)
NF EN ISO 7783
December 2011
Standard Cancelled
Paints and varnishes - Determination of water-vapour transmission properties - Cup method

Le présent document spécifie une méthode permettant de déterminer les propriétés de transmission de la vapeur d'eau des revêtements de peinture, vernis et produits assimilés.

Table of contents
  • Avant-propos
  • 1 Domaine d'application
  • 2 Références normatives
  • 3 Termes et définitions
  • 4 Principe
  • 5 Appareillage et matériaux
  • 6 Préparation de l'essai
  • 7 Mode opératoire
  • 8 Expression des résultats
  • 9 Fidélité
  • 10 Rapport d'essai
  • Annexe B (normative) Utilisation de cire fondue pour sceller l'assemblage d'essai
  • Annexe A (informative) Exploitation de la Formule (8) pour le calcul de l'épaisseur d'air équivalente pour la diffusion de vapeur d'eau, sd
  • Bibliographie
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