BS EN 13523-22:2017 - Coil coated metals. Test methods. Colour difference. Visual comparison

BS EN 13523-22:2017

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

Status : Current   Published : February 2017



This part of the EN 13523 series 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.


Results might 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 13523-15).

If a metameric match is to be reported in objective terms, spectrophotometric measurements (using CIE Standard Illuminants D65 and A) should be made, in accordance with EN 13523–15.

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 should only 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.

Standard NumberBS EN 13523-22:2017
TitleCoil coated metals. Test methods. Colour difference. Visual comparison
Publication Date28 February 2017
Normative References(Required to achieve compliance to this standard)EN 13523-0:2014
Informative References(Provided for Information)EN 13523-15:2015, ISO 3668
ReplacesBS EN 13523-22:2010
International RelationshipsEN 13523-22:2017
Draft Superseded By15/30329707 DC
DescriptorsCoatings, Metals, Colour tests, Coils, Visual inspection (testing), Paints, Organic coatings, Colorimetric characteristics
Title in FrenchTôles prélaquées. Méthodes d'essai. Différence de couleur. Comparaison visuelle
Title in GermanBandbeschichtete Metalle. Prüfverfahren. Farbabstand. Visueller Vergleich
ISBN978 0 580 91553 6
File Size382 KB

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