Reference number
ISO 5631-1:2022
© ISO 2024
International Standard
ISO 5631-1:2022
Paper and board — Determination of colour by diffuse reflectance — Part 1: Indoor daylight conditions (C/2°)
Edition 3
2022-07
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Published (Edition 3, 2022)

ISO 5631-1:2022

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Format
CHF 96
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Abstract

This document specifies a method for measuring the colour of paper and board by the diffuse reflectance method with the elimination of specular gloss.

This document is not applicable to coloured papers or boards which incorporate fluorescent dyes or pigments. It may be used to determine the colour of papers or boards which contain fluorescent whitening agents provided the UV content of the illumination on the test piece has been adjusted to conform to that in the CIE illuminant C, using a fluorescent reference standard that fulfils the requirements for international fluorescent reference standards of level 3 (IR3) as prescribed by ISO 2469 with an assigned ISO brightness value provided by an authorized laboratory, as described in ISO 2470‑1.

General information

  • Status
     : Published
    Publication date
     : 2022-07
    Stage
    : International Standard published [60.60]
  • Edition
     : 3
    Number of pages
     : 13
  • Technical Committee :
    ISO/TC 6
    ICS :
    85.060 
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