Coil coated metals. Test methods -- Colour difference and metamerism. Instrumental comparison
This part of EN 13523 specifies procedures for determining the instrumental colour difference (CIELAB) of an organic coating on a metallic substrate.
Establishing a standard as well as the magnitude of an acceptable colour difference are not covered by this method.
Two methods are given in this part of EN 13523:
instrumental colour difference measurement using a tristimulus colorimeter;
instrumental colour difference measurement using a spectrophotometer or equivalent.
Care should be taken when measuring e.g.
textured surfaces;
fluorescent coatings;
metameric coatings;
multi-coloured, pearlescent, metallic or special colour effect coatings.
In order to determine whether metamerism is present, the metamerism index is determined (see EN 13523-15) and/or a visual examination (see EN 13523-22) is performed with different artificial light sources.
| SDO | BSI: British Standards Institution |
| Document Number | EN 13523-3 |
| Publication Date | June 30, 2014 |
| Language | en - English |
| Page Count | 14 |
| Revision Level | |
| Supercedes | |
| Committee | STI/21 |