BSI BS EN 927-7:2020

Current Consolidated
Paints and varnishes. Coating materials and coating systems for exterior wood -- Assessment of knot staining resistance of wood coatings

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BSI BS EN 927-7:2020

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

PUBLISH DATE 2020
PAGES 16
BSI BS EN 927-7:2020

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.

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