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EN 927-7:2020

Paints and varnishes - Coating materials and coating systems for exterior wood - Part 7: Assessment of knot staining resistance of wood coatings

Publication date:   Jul 15, 2020

General information

90.93   Standard confirmed   Dec 3, 2025

CEN

CEN/TC 139 Paints and varnishes

European Norm

87.040   Paints and varnishes

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Scope

This document specifies a test method for assessing the discoloration of coating systems on wood due to wood extractives from knots. The discoloration is measured by colourimetry and the result is stated as the colour difference between the coated surface on the knot and the coated surface beside the knot.

Life cycle

PREVIOUSLY

WITHDRAWN
CEN/TS 16359:2012

NOW

PUBLISHED
EN 927-7:2020
90.93 Standard confirmed
Dec 3, 2025