SIS-CEN/TS-16498 › Paints and varnishes - Coating materials and coating systems for exterior wood - Assessment of tannin staining
SIS-CEN/TS-16498
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2013 EDITION
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CURRENT
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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).
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87.040 (Paints and varnishes Including coating powders, paint coatings and protective paint systems)
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Designation Name
SIS-CEN/TS 16498:2013
Revision Level
2013 EDITION
Status
Current
Publication Date
Dec. 3, 2013
Language(s)
English
Page Count
20