ISO 16053:2022
Paints and varnishes — Coating materials and coating systems for exterior wood — Natural weathering test
This document specifies a natural weathering test for exterior wood coating systems mainly intended for decoration and protection of planed and sawn wood.
The test provides a means of evaluating the performance of a wood coating system during outdoor exposure. It forms the basis for the performance specification according to EN 927-2. It also facilitates the comparison of coating systems performance on different substrates including the wood species, or other wood modifications.
For further information, see Annex E.
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Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Apparatus and materials
6 Coating sampling
7 Test panel selection
7.1 Wood reference species
7.2 Preparation and selection of wood panels
7.2.1 Reference (standard) test panels
7.2.2 Alternative test panels
7.3 Preparation of coated panels
7.3.1 Wood conditioning
7.3.2 Preparation of panels for the test coating
7.3.3 Preparation of panels for the weathering reference material
7.3.4 Sealing and ageing
7.3.5 Thickness of the coating
8 Procedure
8.1 General
8.2 Examination before exposure
8.3 Exposure
8.4 Examination after exposure
8.4.1 Examination on the exposure racks
8.4.2 Laboratory examination of unwashed panels
8.4.3 Laboratory examination of washed panels
9 Precision data
10 Expression of results and test report
Annex A (normative) Details of test methods
Annex B (normative) Assessment requirements for panels of test coatings and WRM
Annex C (informative) Example format for a test report
Annex D (informative) Optional tests including variations to standard weathering test procedure
Annex E (informative) Explanatory notes
Annex F (informative) Precision data
Annex G (normative) Guidance on typical properties for some common wood species
Annex H (informative) Determination of adhesive strength of tape on test surface
Annex I (informative) Thermal or chemical modification to protect the wood
Bibliography
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Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Apparatus and materials
6 Coating sampling
7 Test panel selection
7.1 Wood reference species
7.2 Preparation and selection of wood panels
7.2.1 Reference (standard) test panels
7.2.2 Alternative test panels
7.3 Preparation of coated panels
7.3.1 Wood conditioning
7.3.2 Preparation of panels for the test coating
7.3.3 Preparation of panels for the weathering reference material
7.3.4 Sealing and ageing
7.3.5 Thickness of the coating
8 Procedure
8.1 General
8.2 Examination before exposure
8.3 Exposure
8.4 Examination after exposure
8.4.1 Examination on the exposure racks
8.4.2 Laboratory examination of unwashed panels
8.4.3 Laboratory examination of washed panels
9 Precision data
10 Expression of results and test report
Annex A (normative) Details of test methods
Annex B (normative) Assessment requirements for panels of test coatings and WRM
Annex C (informative) Example format for a test report
Annex D (informative) Optional tests including variations to standard weathering test procedure
Annex E (informative) Explanatory notes
Annex F (informative) Precision data
Annex G (normative) Guidance on typical properties for some common wood species
Annex H (informative) Determination of adhesive strength of tape on test surface
Annex I (informative) Thermal or chemical modification to protect the wood
Bibliography