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038761 - ČSN EN 13523-15 - Kontinuálně lakované kovové pásy - Zkušební metody - Část 15: Metamerie | ||
| Název : 038761 - ČSN EN 13523-15 - Kontinuálně lakované kovové pásy - Zkušební metody - Část 15: Metamerie
Označení normy : ČSN EN 13523-15 Katalogové číslo : 98580 Třídící znak : 038761 Účinnost : 2016-02-01 Věstník : 2016.01 Strany : 12 Převzata :vyhlášením ve Věstníku - v angličtině TATO NORMA JE NEPLATNÁ | ||
| Cena : | 204.00 Kč (DPH= 0%), s DPH= 204.00 Kč | Nelze zakoupit |
| ANOTACE "ČSN EN 13523-15 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 dE (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." | ||