Standard Swedish standard · SS-EN 13523-22:2024

Coil coated metals - Test methods - Part 22: Colour difference - Visual comparison

Status: Valid

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Standard Swedish standard · SS-EN 13523-22:2024

Coil coated metals - Test methods - Part 22: Colour difference - Visual comparison
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Scope
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.

Subjects

Colours and measurement of light (17.180.20) Organic coatings (25.220.60)


Buy this standard

Standard Swedish standard · SS-EN 13523-22:2024

Coil coated metals - Test methods - Part 22: Colour difference - Visual comparison
Subscribe on standards - Read more Dölj
Price: 636 SEK
standard ikon pdf

PDF

Price: 636 SEK
standard ikon

Paper

Price: 1 017,60 SEK
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Product information

Language: English

Written by: Svenska institutet för standarder

International title:

Article no: STD-82087159

Edition: 4

Approved: 5/3/2024

No of pages: 15

Replaces: SS-EN 13523-22:2017