PD CEN/TS 16498:2013
Current
The latest, up-to-date edition.
Paints and varnishes. Coating materials and coating systems for exterior wood. Assessment of tannin staining
Hardcopy , PDF
English
30-11-2013
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Apparatus and materials
5 Procedure
6 Test report
Bibliography
Defines a test method for assessing the discoloration of coatings on wood by tannin staining due to wood extractives.
| Committee |
STI/28
|
| DocumentType |
Standard
|
| Pages |
16
|
| PublisherName |
British Standards Institution
|
| Status |
Current
|
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).
| Standards | Relationship |
| CEN/TS 16498:2013 | Identical |
| ISO 7724-2:1984 | Paints and varnishes Colorimetry Part 2: Colour measurement |
| EN 927-5:2006 | Paints and varnishes - Coating materials and coating systems for exterior wood - Part 5: Assessment of the liquid water permeability |
| ISO 3131:1975 | Wood — Determination of density for physical and mechanical tests |
| ISO 554:1976 | Standard atmospheres for conditioning and/or testing — Specifications |
| CEN/TS 16359:2012 | Paints and varnishes - Coating materials and coating systems for exterior wood - Assessment of knot staining resistance of wood coatings |
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