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BSI PD CEN/TS 16498:2013

Paints and varnishes. Coating materials and coating systems for exterior wood. Assessment of tannin staining
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BSI PD CEN/TS 16498:2013

Paints and varnishes. Coating materials and coating systems for exterior wood. Assessment of tannin staining

PUBLISH DATE 2013
PAGES 16
BSI PD CEN/TS 16498:2013

This Technical Specification specifies a test method for assessing the discoloration of coatings on wood by tannin staining due to wood extractives. The method uses an extract from Merbau wood as an indicator. Bleeding of wood extractives is assessed at two specified stages firstly after coating application and secondly after cyclic climate exposure. A qualification of colour differences that can be attributed to three different causes, bleeding of extractives, low opacity of the coating film or general yellowing in climate exposure, is included. This document does not specify acceptance values for colour differences that can be tolerated and it is not applicable to staining caused by knots for which there is a different test method (e. g. CEN/TS 16359).

SDO BSI: British Standards Institution
Document Number CEN/TS 16498
Publication Date Nov. 30, 2013
Language en - English
Page Count 16
Revision Level
Supercedes
Committee STI/28
Publish Date Document Id Type View
Nov. 30, 2013 PD CEN/TS 16498:2013 Revision