oSIST prEN 13523-22:2023
(Main)Coil coated metals - Test methods - Part 22: Colour difference - Visual comparison
Coil coated metals - Test methods - Part 22: Colour difference - Visual comparison
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.
Bandbeschichtete Metalle - Prüfverfahren - Teil 22: Farbabstand - Visueller Vergleich
Dieses Dokument legt das Verfahren zum Bestimmen des Farbabstandes einer organischen Beschichtung auf einem metallischen Substrat durch visuellen Vergleich mit einem Standard, entweder unter diffusem Tageslicht oder unter künstlichem Tageslicht in einer genormten Farbabmusterungskabine, fest.
ANMERKUNG Die Ergebnisse bei natürlichem und künstlichem Tageslicht können voneinander abweichen.
Es kann vorkommen, dass die Farben zweier Proben bei Tageslicht übereinstimmen, aber nicht unter einer anderen Lichtquelle. Dieses Phänomen ist als Metamerie bekannt (siehe EN 13523 3).
Wenn die Übereinstimmung metamerer Proben objektiv bewertet wird, können farbmetrische Messungen (mit CIE Normlichtart D65 und A) nach EN 13523 3 durchgeführt werden.
Es werden weder die Präzision noch die Genauigkeit dieses Verfahrens angegeben, da die abgeleiteten Ergebnisse nicht in Form von Zahlenwerten angegeben werden und auch keine objektive Ja/Nein-Bewertung ermöglichen. Deshalb soll dieses Verfahren nur angewendet werden, wenn Messungen mit Farbmessgeräten nicht empfohlen werden können (Bewertung der farblichen Übereinstimmung von Proben, Prüfung von Metallicfarben usw.).
Die Normung solcher visuellen Vergleiche anhand von Lichtquellen, Beleuchtungs- und Beobachtungs-bedingungen sowie Probenabmessungen führt zu einheitlicheren Ergebnissen. Diese Praxis ist wichtig für kritische Farbvergleiche und wird besonders für Farbprüfungen empfohlen.
Tôles prélaquées - Méthodes d'essai - Partie 22: Différence de couleur - Comparaison visuelle
Le présent document spécifie le mode opératoire à appliquer pour déterminer la différence de couleur entre un revêtement organique appliqué sur un subjectile métallique et un étalon, en les comparant visuellement à la lumière du jour naturelle diffuse ou sous une lumière du jour artificielle dans une cabine normalisée.
NOTE Les résultats peuvent différer selon le type de lumière (naturelle ou artificielle).
Il peut arriver que deux éprouvettes de couleur identiques à la lumière du jour ne le soient pas sous une autre source de lumière. Ce phénomène est connu sous le nom de métamérisme (voir l’EN 13523 3).
Si une identité par métamérisme doit être consignée dans le rapport de manière objective, des mesures spectrophotométriques (à l’aide des illuminants normalisés D65 et A de la CIE) peuvent être effectuées, conformément à l’EN 13523 3.
Aucune déclaration n’est faite concernant la fidélité ou l’exactitude du présent mode opératoire car les résultats obtenus ne se présentent pas sous forme numérique et ils ne fournissent pas non plus une évaluation objective de type acceptation/rejet. Par conséquent, ce mode opératoire est uniquement destiné à être mis en œuvre lorsque l’utilisation d’instruments de mesure de la couleur n’est pas recommandée (évaluation de l’identité des couleurs, contrôle des couleurs métalliques, etc.).
La normalisation de ce type de comparaisons visuelles au moyen de sources de lumière, en éclairant et en examinant des éprouvettes de géométrie et taille données, permet d’améliorer l’uniformité des résultats. Cette pratique est fondamentale pour les comparaisons de couleurs critiques et est vivement recommandée pour les contrôles de la couleur.
Prevlečene kovine, ki se navijajo - Preskusne metode - 22. del: Razlika v niansi - Vizualna primerjava
General Information
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Standards Content (Sample)
SLOVENSKI STANDARD
oSIST prEN 13523-22:2023
01-september-2023
Prevlečene kovine, ki se navijajo - Preskusne metode - 22. del: Razlika v niansi -
Vizualna primerjava
Coil coated metals - Test methods - Part 22: Colour difference - Visual comparison
Bandbeschichtete Metalle - Prüfverfahren - Teil 22: Farbabstand - Visueller Vergleich
Tôles prélaquées - Méthodes d'essai - Partie 22: Différence de couleur - Comparaison
visuelle
Ta slovenski standard je istoveten z: prEN 13523-22
ICS:
17.180.20 Barve in merjenje svetlobe Colours and measurement of
light
25.220.60 Organske prevleke Organic coatings
oSIST prEN 13523-22:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN 13523-22:2023
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oSIST prEN 13523-22:2023
DRAFT
EUROPEAN STANDARD
prEN 13523-22
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2023
ICS 25.220.60 Will supersede EN 13523-22:2017
English Version
Coil coated metals - Test methods - Part 22: Colour
difference - Visual comparison
Tôles prélaquées - Méthodes d'essai - Partie 22: Bandbeschichtete Metalle - Prüfverfahren - Teil 22:
Différence de couleur - Comparaison visuelle Farbabstand - Visueller Vergleich
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 139.
If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations
which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC
Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 13523-22:2023 E
worldwide for CEN national Members.
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oSIST prEN 13523-22:2023
prEN 13523-22:2023 (E)
Contents Page
European foreword . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Principle . 6
5 Illumination for colour matching . 6
5.1 Natural daylight . 6
5.2 Artificial daylight . 6
5.3 Colour-matching booth . 6
6 Observer . 7
7 Sampling . 7
8 Test specimens and reference standards . 7
9 Procedure . 7
9.1 General. 7
9.2 Day-to-day routine . 7
9.3 Referee procedure . 8
10 Expression of results . 8
11 Precision . 8
12 Test report . 8
Bibliography . 10
2
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oSIST prEN 13523-22:2023
prEN 13523-22:2023 (E)
European foreword
This document (prEN 13523-22:2023) has been prepared by Technical Committee CEN/TC 139 “Paints
and varnishes”, the secretariat of which is held by DIN.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 13523-22:2017.
In comparison with the previous edition, the following technical modifications have been made:
a) the text has been editorially revised and the normative references have been updated.
The EN 13523 series, Coil coated metals — Test methods, consists of the following parts:
— Part 0: General introduction
— Part 1: Film thickness
— Part 2: Gloss
— Part 3: Colour difference and metamerism — Instrumental comparison
— Part 4: Pencil hardness
— Part 5: Resistance to rapid deformation (impact test)
— Part 6: Adhesion after indentation (cupping test)
— Part 7: Resistance to cracking on bending (T-bend test)
— Part 8: Resistance to salt spray (fog)
— Part 9: Resistance to water immersion
— Part 10: Resistance to fluorescent UV radiation and water condensation
— Part 11: Resistance to solvents (rubbing test)
— Part 12: Resistance to scratching
— Part 13: Resistance to accelerated ageing by the use of heat
— Part 14: Chalking (Helmen method)
— Part 16: Resistance to abrasion
— Part 17: Adhesion of strippable films
— Part 18: Resistance to staining
— Part 19: Panel design and method of atmospheric exposure testing
— Part 20: Foam adhesion
3
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oSIST prEN 13523-22:2023
prEN 13523-22:2023 (E)
— Part 21: Evaluation of outdoor exposed panels
— Part 22: Colour difference — Visual comparison
— Part 23: Resistance to humid atmospheres containing sulfur dioxide
— Part 24: Resistance to blocking and pressure marking
— Part 25: Resistance to humidity
— Part 26: Resistance to condensation of water
— Part 27: Resistance to humid poultice (Cataplasm test)
— Part 29: Resistance to environmental soiling (Dirt pick-up and striping)
4
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oSIST prEN 13523-22:2023
prEN 13523-22:2023 (E)
1 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.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 13523-0:20
...
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