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  • BSI
    BS EN 13523-22:2017 - TC Tracked Changes. Coil coated metals. Test methods - Colour difference. Visual comparison
    Edition: 2020
    $324.62
    / user per year

Description of BS EN 13523-22:2017 - TC 2020

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. NOTE 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 - TC
TitleTracked Changes. Coil coated metals. Test methods - Colour difference. Visual comparison
StatusRevision Underway
Publication Date2020-02-25
DescriptorsCoatings, Metals, Colour tests, Coils, Visual inspection (testing), Paints, Organic coatings, Colorimetric characteristics
ICS25.220.60 Organic coatings
CommitteeSTI/21
ISBN978 0 539 09950 8
PublisherBSI
Pages0

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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