PREN 927-7-2018
Paints and varnishes - Coating materials and coating systems for exterior wood - Part 7: Assessment of knot staining resistance of wood coatings

Standard No.

PREN 927-7-2018

Release Date

2018

Published By

CEN - European Committee for Standardization

Latest

PREN 927-7-2018

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 colorimetry and the result is stated as the colour difference between the coated surface on the knot and the coated surface beside the knot.

PREN 927-7-2018 history

• 2018 PREN 927-7-2018 Paints and varnishes - Coating materials and coating systems for exterior wood - Part 7: Assessment of knot staining resistance of wood coatings

PREN 927-7-2018 -All Parts