SIST EN 13523-15:2003
(Main)Coil coated metals - Test methods - Part 15: Metamerism
Coil coated metals - Test methods - Part 15: Metamerism
This Part of EN 13523 defines terms of the procedure for determining the metamerism of a colour match of an organic coating on a metallic substrate.
When two colour specimens have identical spectral reflection curves, they will match under any illuminant irrespective of its spectral characteristics. This is termed a "spectral match". It is also possible for two colour specimens having different spectral reflection curves to match visually under a given light source but not to match under another light source with different spectral characteristics; such matches are termed "metameric".
One quantitative description of metamerism is the so-called "metamerism index".
The information of the metamerism index is of limited value where DE (instrumental colour difference for a given illuminant, see EN 13523-3:2001) is > 0,5. The metamerism index is not suited for determining the absolute colour difference or colour constancy of a given specimen at change of illuminant.
The colour difference under the reference illuminant is to be measured in colour coordinates L*, a* and b* (see EN 13523-3:2001).
Excluded from this method are organic coatings producing fluorescence and/or which are multicoloured, pearlescent or metallic.
Bandbeschichtete Metalle - Prüfverfahren - Teil 15: Metamerie
Dieser Teil von EN 13523 beschreibt das Verfahren zum Bestimmen von Metamerie bei einem Probenpaar einer organischen Beschichtung auf einem metallischen Substrat.
Wenn zwei Farbproben identische spektrale Reflektionskurven aufweisen, ist ihre Farbe bei jeder Lichtart unabhängig von deren spektralen Eigenschaften gleich. Dies wird "unbedingt gleich" genannt. Es ist auch möglich, dass zwei Farbproben, die unterschiedliche spektrale Reflektionskurven aufweisen, unter einer bestimmten Lichtquelle gleich aussehen, jedoch nicht unter einer anderen Lichtquelle mit anderen spektralen Eigenschaften. Dies wird "metamer" genannt.
Eine quantitative Beschreibung der Metamerie ist der "Metamerie-Index".
Die Angabe des Metamerie-Index ist von begrenztem Wert, wenn DE (der gemessene Farbabstand für eine bestimmte Lichtart, siehe EN 13523-3:2001) > 0,5 ist. Der Metamerie-Index ist nicht geeignet zum Bestimmen des absoluten Farbabstands oder der Farbkonstanz einer bestimmten Probe bei Lichtartwechsel.
Der Farbabstand unter der Bezugslichtart ist durch die Farbmaßzahlen L*, a* und b* (siehe EN 13523-3:2001) zu messen.
Von diesem Verfahren ausgeschlossen sind fluoreszierende Beschichtungen, mehrfarbige Proben, Proben mit Metallic-Beschichtungen und Proben, die Perlglanzeffekte aufweisen.
Tôles prélaquées - Méthodes d'essai - Partie 15 : Métamérisme
La présente partie de l'EN 13523 décrit la méthode de détermination du métamérisme de plusieurs échantillons d'un revetement organique de meme couleur sur un support métallique.
La présente partie de l'EN 13523 décrit la méthode de détermination du métamérisme de plusieurs échantillons d'un revetement organique de meme couleur sur un support métallique.
Lorsque deux échantillons de couleur ont des courbes de réflexion spectrale identiques, ils sont de la meme couleur quel que soit l'illuminant et ses caractéristiques spectrales. Il s'agit d'un «appariement spectral». Il se peut aussi que deux échantillons de couleur n'ayant pas la meme courbe de réflexion spectrale présentent la meme couleur sous une source lumineuse donnée, mais pas sous une autre dont les caractéristiques spectrales sont différentes ; il s'agit alors d'un «appariement métamérique».
L'indice de métamérisme est une description quantitative du métamérisme.
Les informations de l'indice de métamérisme ont une valeur limitée lorsque ?E (différence de couleur mesurée par des instruments pour un illuminant donné, voir EN 13523-3:2001) est supérieur a 0,5. L'indice de métamérisme ne permet pas de déterminer la différence de couleur absolue ou la constance de couleur d'une éprouvette donnée si l'illuminant change.
La différence de couleur sous l'illuminant de référence est a mesurer en coordonnées de couleurs L*, a* et b* (voir EN 13523-3:2001).
Cette méthode ne s'applique pas aux éprouvettes fluorescentes et/ou multicolores, perlées ou métalliques.
Kovine, zaščitene po postopku coil-coating - Metode preskušanja - 15. del: Metamerija
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.0HWDPHULMDBandbeschichtete Metalle - Prüfverfahren - Teil 15: MetamerieTôles prélaquées - Méthodes d'essai - Partie 15 : MétamérismeCoil coated metals - Test methods - Part 15: Metamerism25.220.60Organske prevlekeOrganic coatings17.180.20Barve in merjenje svetlobeColours and measurement of lightICS:Ta slovenski standard je istoveten z:EN 13523-15:2002SIST EN 13523-15:2003en01-januar-2003SIST EN 13523-15:2003SLOVENSKI
STANDARD
SIST EN 13523-15:2003
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 13523-15July 2002ICS 17.180.20; 25.220.60English versionCoil coated metals - Test methods - Part 15: MetamerismTôles prélaquées - Méthodes d'essai - Partie 15:MétamérismeBandbeschichtete Metalle - Prüfverfahren - Teil 15:MetamerieThis European Standard was approved by CEN on 11 April 2002.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the 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 translationunder the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2002 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 13523-15:2002 ESIST EN 13523-15:2003
EN 13523-15:2002 (E)2ForewordThis document EN 13523-15:2002 has been prepared by Technical Committee CEN/TC 139 "Paints andvarnishes", 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 orby endorsement, at the latest by January 2003, and conflicting national standards shall be withdrawn at the latestby January 2003.According to the CEN/CENELEC Internal Regulations, the national standards organizations of the followingcountries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain,Sweden, Switzerland and the United Kingdom.1 ScopeThis Part of EN 13523 defines terms of the procedure for determining the metamerism of a colour match of anorganic coating on a metallic substrate.When two colour specimens have identical spectral reflection curves, they are matching under any illuminantirrespective of its spectral characteristics. This is termed a "spectral match". It is also possible for two colourspecimens having different spectral reflection curves to match visually under a given light source but not to matchunder another light source with different spectral characteristics; such matches are termed "metameric".One quantitative description of metamerism is the so-called "metamerism index".The information of the metamerism index is of limited value where DE (instrumental colour difference for a givenilluminant, see EN 13523-3:2001) is > 0,5. The metamerism index is not suited for determining the absolute colourdifference or colour constancy of a given specimen at change of illuminant.The colour difference under the reference illuminant is to be measured in colour coordinates L*, a* and b* (seeEN 13523-3:2001).Excluded from this method are organic coatings producing fluorescence and/or which are multicoloured,pearlescent or metallic.2 Normative referencesThis European Standard incorporates, by dated or undated reference, provisions from other publications. Thesenormative references are cited at the appropriate places in the text, and the publications are listed hereafter. Fordated references, subsequent amendments to or revisions of any of these publications apply to this EuropeanStandard only when incorporated in it by amendment or revision. For undated references the latest edition of thepublication referred to applies (including amendments).EN 13523-0:2001, C
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