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Technische Regel

ONR CEN/TS 16498

Issue date: 2014 01 01

Paints and varnishes - Coating materials and coating systems for exterior wood - Assessment of tannin staining (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 ex...
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Valid
Publisher:
Austrian Standards International
Format:
Digital | 13 Pages
Language:
German | English | Download GER/ENG
Optionally co-design standards:
Committee 050: Paints and varnishes
ICS
87.040
Topics
Chemistry, paper & textiles, Paints and varnishes. Inks. Printing inks, Paints and varnishes
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).
ONR CEN/TS 16498
2014 01 01
Paints and varnishes - Coating materials and coating systems for exterior wood - Assessment of tanni...
Technische Regel
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ONR CEN/TS 16498
2012 11 15
Paints and varnishes - Coating materials and coating systems for exterior wood - Assessment of tanni...
Technische Regel Entwurf
Norm
ISO 554:1976
Issue date : 1976 08 01
Standard atmospheres for conditioning and/or testing — Specifications
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ÖNORM EN 927-5
Issue date : 2007 03 01
Paints and varnishes - Coating materials and coating systems for exterior wood - Part 5: Assessment of the liquid water permeability
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ISO 554:1976
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Standard atmospheres for conditioning and/or testing — Specifications
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ISO 3131:1975
Issue date : 1975 11 01
Wood — Determination of density for physical and mechanical tests
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ISO 7724-2:1984
Issue date : 1984 09 01
Paints and varnishes — Colorimetry — Part 2: Colour measurement