ISO 5631-1:2022
Paper and board — Determination of colour by diffuse reflectance — Part 1: Indoor daylight conditions (C/2°)
- Standard No.
- ISO 5631-1:2022
- Release Date
- 2022
- Published By
- International Organization for Standardization (ISO)
- Latest
- ISO 5631-1:2022
- 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 5631-1:2022 Referenced Document
- ISO 186 Paper and board - Sampling to determine average quality
- ISO 2469 Paper, board and pulps*， 2024-03-01 Update
- ISO 2470-1 Paper, board and pulps - Measurement of diffuse blue reflectance factor - Part 1: Indoor daylight conditions (ISO brightness)
ISO 5631-1:2022 history
- 2022 ISO 5631-1:2022 Paper and board — Determination of colour by diffuse reflectance — Part 1: Indoor daylight conditions (C/2°)
- 2015 ISO 5631-1:2015 Paper and board - Determination of colour by diffuse reflectance - Part 1: Indoor daylight conditions (C/2 degrees)
- 2009 ISO 5631-1:2009 Paper and board - Determination of colour by diffuse reflectance - Part 1: Indoor daylight conditions (C/2°)
