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Normas DIN – AENOR
DIN EN 13523-22:2015-12

DIN EN 13523-22:2015-12

Coil coated metals - Test methods - Part 22: Colour difference - Visual comparison; German and English version prEN 13523-22:2015 / Note: Date of issue 2015-11-20

Tôles prélaquées - Méthodes d'essai - Partie 22: Différence de couleur - Comparaison visuelle; Version allemande et anglaise prEN 13523-22:2015 / Attention: Date de parution 2015-11-20

Bandbeschichtete Metalle - Prüfverfahren - Teil 22: Farbabstand - Visueller Vergleich; Deutsche und Englische Fassung prEN 13523-22:2015 / Achtung: Erscheinungsdatum 2015-11-20

Fecha Anulación:
2017-05 /Withdrawn
Equivalencias internacionales:

prEN 13523-22 (2015-11)

Relación con otras normas DIN:

Reemplazada por: DIN EN 13523-22:2017-05

Resumen:
This European Standard 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 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.).Although colour measuring instruments should be used where possible, in some cases a visual comparison can be useful (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.
Keywords:
Artificial lighting, Coating materials, Coatings, Coil coatings, Colour, Colour comparisons, Colour differences, Colour fastness, Conditions, Definitions, Diffuse, Industrial atmosphere, Lighting systems, Metal coating, Metals, Natural, Natural lighting, Organic coatings, Paints, Requirements, Resistance, Test panels, Testing, Visual, Visual inspection (testing)
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