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BS EN 927-7:2020
Paints and varnishes. Coating materials and coating systems for exterior wood Assessment of knot staining resistance of wood coatings
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| Označení normy: | BS EN 927-7:2020 |
| Počet stran: | 16 |
| Vydáno: | 2020-09-03 |
| ISBN: | 978 0 539 15327 9 |
| Status: | Standard |
Popis
BS EN 927-7:2020
This standard BS EN 927-7:2020 Paints and varnishes. Coating materials and coating systems for exterior wood is classified in these ICS categories:
- 87.040 Paints and varnishes
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.