BS EN 13523-3:2014
$86.31
Coil coated metals. Test methods – Colour difference. Instrumental comparison
| Published By | Publication Date | Number of Pages |
| BSI | 2014 | 14 |
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:
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instrumental colour difference measurement using a tristimulus colorimeter;
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instrumental colour difference measurement using a spectrophotometer or equivalent.
Care should be taken when measuring e.g.
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textured surfaces;
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fluorescent coatings;
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metameric coatings;
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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.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 4 | Contents Page |
| 5 | Foreword |
| 7 | 1 Scope 2 Normative references 3 Terms and definitions |
| 8 | 4 Principle 5 Apparatus 6 Sampling 7 Specimens |
| 9 | 8 Procedure 8.1 Calibration 8.2 Measurement 9 Expression of results |
| 10 | 10 Accuracy 11 Test report |
| 11 | Bibliography |
