NF EN 927-7

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

Le présent document spécifie une méthode d'essai pour évaluer la décoloration des systèmes de peintures sur bois causée par des extractibles situés dans les noeuds du bois. La décoloration est mesurée par colorimétrie et le résultat est énoncé comme la différence de couleur entre la surface revêtue sur le noeud et la surface revêtue à côté du noeud.

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