EN 13523-22:2024
(Main)Coil coated metals - Test methods - Part 22: Colour difference - Visual comparison
Coil coated metals - Test methods - Part 22: Colour difference - Visual comparison
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.
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: Barvna razlika - Vizualna primerjava
Ta del skupine standardov EN 13523 določa postopek za ugotavljanje razlike v barvi organske prevleke na kovinski podlagi z vizualno primerjavo s standardom z uporabo razpršene naravne dnevne svetlobe ali umetne dnevne svetlobe v standardni kabini.
OPOMBA: Rezultati med naravno in umetno dnevno svetlobo se lahko razlikujejo.
Možno je, da se bosta barvna preskušanca pri dnevni svetlobi ujemala, pri uporabi drugega vira svetlobe pa ne. Ta pojav se imenuje metamerija (glej standard EN 13523-15).
Če je metamerično ujemanje treba podati objektivno, je treba opraviti spektrofotometrične meritve (s standardnimi svetili CIE D65 in A) v skladu s standardom EN 13523-15.
Glede natančnosti ali točnosti tega postopka ni podana nobena izjava, saj pridobljeni rezultati niso v številski obliki in ne omogočajo objektivnega vrednotenja ustreznosti/neustreznosti. Zato se ta postopek uporablja samo, kadar uporaba instrumentov za meritve barve ni priporočljiva (vrednotenje ujemanja barve, pregled kovinskih barv itd.).
Standardizacija takšnih vizualnih primerjav s svetlobnimi viri, geometrijo svetilnosti in prikaza ter velikostjo vzorca zagotavlja večjo enotnost rezultatov. Ta praksa je bistvena za ključno barvno ujemanje in je zelo priporočljiva za preglede barv.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-september-2024
Nadomešča:
SIST EN 13523-22:2017
Prevlečene kovine, ki se navijajo - Preskusne metode - 22. del: Barvna razlika -
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: EN 13523-22:2024
ICS:
17.180.20 Barve in merjenje svetlobe Colours and measurement of
light
25.220.60 Organske prevleke Organic coatings
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN 13523-22
EUROPEAN STANDARD
NORME EUROPÉENNE
April 2024
EUROPÄISCHE NORM
ICS 25.220.60 Supersedes 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 European Standard was approved by CEN on 1 January 2024.
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. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists 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.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 13523-22:2024 E
worldwide for CEN national Members.
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 . 9
Bibliography . 10
European foreword
This document (EN 13523-22:2024) has been prepared by Technical Committee CEN/TC 139 “Paints and
varnishes”, the secretariat of which is held by DIN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by October 2024, and conflicting national standards shall
be withdrawn at the latest by October 2024.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 13523-22:2017.
22:2017:
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
— 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)
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: 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 the United
Kingdom.
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 can 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
ma
...
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