Standard Svensk standard · SS-EN 13523-15:2015

Bandlackerade metaller - Provningsmetoder - Del 15: Metamerism

Status: Gällande

Omfattning
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 ?E (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.

Ämnesområden

Ytstruktur (17.040.20) Organiska ytbeläggningar (25.220.60)


Produktinformation

Språk: Engelska

Framtagen av: Färg och lack, SIS/TK 433

Internationell titel: Coil coated metals - Test methods - Part 15: Metamerism

Artikelnummer: STD-8014855

Utgåva: 2

Fastställd: 2015-07-12

Antal sidor: 20

Ersätter: SS-EN 13523-15