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ISO 5631-2:2022

Paper and board — Determination of colour by diffuse reflectance — Part 2: Outdoor daylight conditions (D65/10°) ISO 5631-2:2022

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

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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.
It can be used to determine the colour of papers or boards that contain fluorescent whitening agents, provided the UV content of the illumination on the test piece has been previously adjusted to give the calibrated colorimetric value corresponding to CIE standard illuminant D65, using a fluorescent reference standard with an assigned CIE whiteness (D65/10°) value provided by an authorized laboratory, as described in ISO 11475.
This document is not applicable to coloured papers or boards that incorporate fluorescent dyes or pigments.

Life cycle

PREVIOUSLY

WITHDRAWN
ISO 5631-2:2015

NOW

PUBLISHED
ISO 5631-2:2022
60.60 Standard published
Jul 19, 2022