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INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 18314-4
ISO/TC 256
Analytical colorimetry —
Secretariat: DIN
Voting begins on:
Part 4:
2023-07-25
Metamerism index for pairs of
Voting terminates on:
samples for change of illuminant
2023-09-19
Analyse colorimétrique —
Partie 4: Indice de métamérisme de paires d'échantillons pour
changement d'illuminant
ISO/CEN PARALLEL PROCESSING
RECIPIENTS OF THIS DRAFT ARE INVITED TO
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Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/FDIS 18314-4:2023(E)
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN-
DARDS TO WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS. © ISO 2023
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ISO/FDIS 18314-4:2023(E)
FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 18314-4
ISO/TC 256
Analytical colorimetry —
Secretariat: DIN
Voting begins on:
Part 4:
Metamerism index for pairs of
Voting terminates on:
samples for change of illuminant
Analyse colorimétrique —
Partie 4: Indice de métamérisme de paires d'échantillons pour
changement d'illuminant
COPYRIGHT PROTECTED DOCUMENT
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ISO/CEN PARALLEL PROCESSING
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OF ANY RELEVANT PATENT RIGHTS OF WHICH
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THEY ARE AWARE AND TO PROVIDE SUPPOR TING
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DOCUMENTATION.
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IN ADDITION TO THEIR EVALUATION AS
Reference number
Email: [email protected]
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/FDIS 18314-4:2023(E)
Website: www.iso.org
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
Published in Switzerland
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN-
DARDS TO WHICH REFERENCE MAY BE MADE IN
ii
© ISO 2023 – All rights reserved
NATIONAL REGULATIONS. © ISO 2023
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ISO/FDIS 18314-4:2023(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols . 2
5 Reference illuminant .3
6 Test illuminant . 3
7 CIELAB coordinates L*, a*, b* . 3
8 Metamerism index for change in illuminant . 4
8.1 General calculation methods .
...