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About This Item
Full Description
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.
Cross References:
EN 13523-0:2014
EN 1396
EN 10169
EN 13523-15:2015
EN 23270
ISO 3270
EN ISO 3668
ISO 3668
EN ISO 4618:2014
ISO 4618:2014
EN ISO 11664-1
ISO 11664-1
EN ISO 11664-4
ISO 11664-4
CIE Publication No 15.2:1986
CIE Publication No 80:1989
BS 950-1
BS 950-2
DIN 6173-2
EN 13523-1
All current amendments available at time of purchase are included with the purchase of this document.
Document History
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BS EN 13523-22:2024
Coil coated metals. Test methods-Colour difference. Visual comparison- Most Recent
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BS EN 13523-22:2017
viewing
Coil coated metals. Test methods-Colour difference. Visual comparison- Historical Version
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BS EN 13523-22:2010
Coil coated metals. Test methods-Colour difference. Visual comparison- Historical Version
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BS EN 13523-22:2003
Coil coated metals. Test methods-Colour difference. Visual comparison- Historical Version