BS EN 13523-15:2015 - Coil coated metals. Test methods. Metamerism

BS EN 13523-15:2015

Coil coated metals. Test methods. Metamerism

Status : Current, Under review   Published : July 2015



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 are matching 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 Δ E (instrumental colour difference for a given illuminant, see EN 13523-3) 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).

Excluded from this method are organic coatings producing fluorescence and/or which are multicoloured, pearlescent or metallic.

Standard NumberBS EN 13523-15:2015
TitleCoil coated metals. Test methods. Metamerism
StatusCurrent, Under review
Publication Date31 July 2015
Normative References(Required to achieve compliance to this standard)EN 13523-3, EN 23270, ISO 3270, EN 13523-0:2014
Informative References(Provided for Information)EN 1396, EN 10169, EN ISO 11664, CIE 15, ISO 18314, ISO 11664, DIN 6172:2014
ReplacesBS EN 13523-15:2002
International RelationshipsEN 13523-15:2015
Draft Superseded By14/30291747 DC
DescriptorsOrganic coatings, Coatings, Colorimetry, Colour tests, Spectrophotometry, Metals, Coils
Title in FrenchTôles prélaquées. Méthodes d'essai. Métamérisme
Title in GermanBandbeschichtete Metalle. Prüfverfahren. Metamerie
ISBN978 0 580 84652 6
File Size0.9854 MB

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