Please select and order
€50.25
excl. VAT
Add to cart
Norm
ÖNORM EN 13523-15
Issue date: 2015 08 15
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 spec...
Withdrawn: 2021 12 15
Publisher:
Austrian Standards International
Format:
Digital | 9 Pages
Language:
German
| English
| Download GER/ENG
Currently valid:
Optionally co-design standards:
ICS
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 delta 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.
ÖNORM EN 13523-3
2021 12 15
Coil coated metals - Test methods - Part 3: Colour difference and metamerism - Instrumental comparis...
Norm
Norm
Issue date :
1992 08 01
Paints and varnishes and their raw materials - Temperatures and humidities for conditioning and testing
Norm
Issue date :
2014 08 01
Coil coated metals - Test methods - Part 0: General introduction
Norm
Issue date :
2014 08 01
Coil coated metals - Test methods - Part 3: Colour difference - Instrumental comparison
Norm
Issue date :
2021 12 15
Coil coated metals - Test methods - Part 3: Colour difference and metamerism - Instrumental comparison