Paints and varnishes. Coating materials and coating systems for exterior wood - Determination of the adhesion on wood after water exposure by a double-X-cut test

Paints and varnishes. Coating materials and coating systems for exterior wood - Determination of the adhesion on wood after water exposure by a double-X-cut test

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1   Scope

This document describes the method for assessing the resistance of paint coatings to separation from substrates when a double-X pattern is cut into the coating, penetrating through to the substrate and using a tape.
Where a measurement of adhesion is required, the method described in CEN/TS 927‑9 can be used.
The double X-cut pattern has been especially designed for wood and wood like substrates to minimize the effects from the incisions and at the same time provide a coating segment enclosed by four cuts.