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Coil coated metals. Test methods. Colour difference. Visual comparison by British Standards Institute Staff is a reference work available to read on EtoBox.

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This standard BS EN 13523-22:2017 Coil coated metals. Test methods is classified in these ICS categories:. 25.220.60 Organic coatings. 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.)

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Author

British Standards Institute Staff

Publisher

BSI British Standards Institution

Published

2017

Language

EN

ISBN

9780580915536

Category

reference