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CEN/TS 16498:2013

Current
Current

The latest, up-to-date edition.

Paints and varnishes - Coating materials and coating systems for exterior wood - Assessment of tannin staining
Published date

11-06-2013

Publisher

Comite Europeen de Normalisation

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Apparatus and materials
5 Procedure
6 Test report
Bibliography

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).

Committee
CEN/TC 139
DocumentType
Technical Specification
PublisherName
Comite Europeen de Normalisation
Status
Current

EN 927-2:2014 Paints and varnishes - Coating materials and coating systems for exterior wood - Part 2: Performance specification
UNI EN 927-2 : 2014 PAINTS AND VARNISHES - COATING MATERIALS AND COATING SYSTEMS FOR EXTERIOR WOOD - PART 2: PERFORMANCE SPECIFICATION
DIN EN 927-2:2014-11 Paints and varnishes - Coating materials and coating systems for exterior wood - Part 2: Performance specification
BS EN 927-2:2014 Paints and varnishes. Coating materials and coating systems for exterior wood Performance specification
UNE-EN 927-2:2015 Paints and varnishes - Coating materials and coating systems for exterior wood - Part 2: Performance specification
I.S. EN 927-2:2014 PAINTS AND VARNISHES - COATING MATERIALS AND COATING SYSTEMS FOR EXTERIOR WOOD - PART 2: PERFORMANCE SPECIFICATION

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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