BS EN 927-7:2020
$102.76
Paints and varnishes. Coating materials and coating systems for exterior wood – Assessment of knot staining resistance of wood coatings
| Published By | Publication Date | Number of Pages |
| BSI | 2020 | 16 |
This document specifies a test method for assessing the discoloration of coating systems on wood due to wood extractives from knots. The discoloration is measured by colourimetry and the result is stated as the colour difference between the coated surface on the knot and the coated surface beside the knot.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 2 | National foreword |
| 5 | European foreword |
| 6 | Introduction |
| 7 | 1 Scope 2 Normative references 3 Terms and definitions 4 Test panels 4.1 Wood |
| 10 | 4.2 Sampling of coating products 4.3 Preparation of coated panels 5 Equipment 5.1 Apparatus for accelerated ageing 5.2 Apparatus for colour measurements 6 Procedure of exposure 7 Measurements 7.1 Measurement of colour difference |
| 11 | 7.2 Calculation of ΔE* 7.3 Statistical evaluation 7.4 Flow diagram for test 8 Test report |
| 13 | Annex A (informative) Explanatory notes |
| 14 | Bibliography |
