DIN EN 13523-3
Coil coated metals - Test methods - Part 3: Colour difference - Instrumental comparison
| Organization: | DIN |
| Publication Date: | 1 August 2014 |
| Status: | active |
| Page Count: | 11 |
| ICS Code (Organic coatings): | 25.220.60 |
scope:
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:
a) instrumental colour difference measurement using a tristimulus colorimeter;
b) 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
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