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  • BSI
    BS ISO 18314-4:2020 Analytical colorimetry - Metamerism index for pairs of samples for change of illuminant
    Edition: 2020
    $435.35
    / user per year

Description of BS ISO 18314-4:2020 2020

This document specifies a formalism for the calculation of the illuminant metamerism of solid surface colours. It cannot be applied to colours of effect coatings without metrical adaptation.

This document only covers the phenomenon of metamerism for change of illuminant, which has the greatest meaning in practical application. In the case of chromaticity coordinates of a pair of samples under reference conditions that do not exactly match, recommendations are given on which correction measures are to be taken. Regarding the reproduction of colours, the metamerism index is used as a measure of quality in order to specify tolerances for colour differences between a colour sample and a colour match under different illumination conditions.

The quantification of the illuminant metamerism of pairs of samples is formally performed by a colour difference assessment, for which tolerances that are common for the evaluation of residual colour differences can be used.

NOTE

In the colorimetric literature and textbooks, the term geometric metamerism is sometimes used for the case that two colours appear to be the same under a specific geometry for visual assessment and selected standard observer and standard illuminant pair, but is perceived as two different colours at changed observation geometry. The term geometric metamerism is different to metamerism described in this document.



Standard NumberBS ISO 18314-4:2020
TitleAnalytical colorimetry - Metamerism index for pairs of samples for change of illuminant
StatusWithdrawn
Publication Date2020-08-18
Withdrawn Date2021-07-19
Identical National Standard OfISO 18314-4
DescriptorsIndexing, Calculations (mathematics), Colour, Samples, Colorimetry
ICS87.060.10 Pigments and extenders
CommitteeW/-
ISBN978 0 580 97163 1
PublisherBSI
Pages32

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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