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BSI BS EN 13523-22:2024

Coil coated metals. Test methods -- Colour difference. Visual comparison
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BSI BS EN 13523-22:2024

Coil coated metals. Test methods -- Colour difference. Visual comparison

PUBLISH DATE 2024
PAGES 14
BSI BS EN 13523-22:2024
This document specifies the procedure for determining the difference in the colour of an organic coating on a metallic substrate by visual comparison against a standard using either diffuse natural daylight or artificial daylight in a standard booth. NOTE Results can differ between natural and artificial daylight. It might be that two colour specimens will match in daylight but not under another light source. This phenomenon is known as metamerism (see EN 13523 3). If a metameric match is to be reported in objective terms, spectrophotometric measurements (using CIE Standard Illuminants D65 and A) can be made, in accordance with EN 13523 3. No statement is made about either the precision or the accuracy of this procedure since the results derived are neither in numerical form nor do they provide a pass/fail evaluation in objective terms. Therefore, this procedure is only intended to be used where the use of colour measuring instruments is not recommendable (evaluation of colour matches, inspection of metallic colours, etc.). The standardization of such visual comparisons, by light sources, illuminating and viewing geometry and specimen size, provides for improved uniformity of results. This practice is essential for critical colour matching and is highly recommended for colour inspections.
SDO BSI: British Standards Institution
Document Number EN 13523-22
Publication Date May 9, 2024
Language en - English
Page Count 14
Revision Level
Supercedes
Committee STI/21
Publish Date Document Id Type View
May 9, 2024 BS EN 13523-22:2024 Revision
Feb. 28, 2017 BS EN 13523-22:2017 Revision
June 30, 2010 BS EN 13523-22:2010 Revision
Aug. 8, 2003 BS EN 13523-22:2003 Revision