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Language
CEN/TS 16498:2013
Edition
11/2013
Paints and varnishes - Coating materials and coating systems for exterior wood - Assessment of tannin staining
Paints and varnishes - Coating materials and coating systems for exterior wood - Assessment of tannin staining
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Abstract
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).
Status
| Standard - Active |
Origin
| Technical Committee : |
| CEN/TC 139 : Paints and varnishes |
Implementation
| start of the vote on the project | date of ratification (dor) | 12/02/2013 | ||||
| end of the vote on the project | date of anouncement (doa) | 28/02/2014 | ||||
| start of the vote on the final project | 11/10/2012 | date of publication (dop) | ||||
| end of the vote on the final project | 11/01/2013 | date of withdrawal (dow) |
|
Publication Official Journal
of the Grand-Duchy of Luxembourg |
06/05/2014 |
| Reference |
Relations
| Evolutions |
International Classification for Standards (ICS codes) :
| 87.040 : Paints and varnishes |
