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ISO 5631-1:2022

Paper and board — Determination of colour by diffuse reflectance — Part 1: Indoor daylight conditions (C/2°) ISO 5631-1:2022

Publication date:   Jul 19, 2022

General information

60.60 Standard published   Jul 19, 2022

ISO

ISO/TC 6 Paper, board and pulps

International Standard

85.060   Paper and board

Buying

Published

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Scope

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.

Life cycle

PREVIOUSLY

WITHDRAWN
ISO 5631-1:2015

NOW

PUBLISHED
ISO 5631-1:2022
60.60 Standard published
Jul 19, 2022