ISO 5631-3:2014 PDF

Scope: This part of ISO 5631 specifies a method for measuring the colour of paper and board by the diffuse reflectance method with the elimination of specular gloss. This part of ISO 5631 is primarily intended for measuring the colour of paper and board to be used in the graphic arts industry, where that industry specifies the measurement of colour under D50/2° conditions in accordance with ISO 13655. This method differs from ISO 13655, in that, the UV content of the illumination is adjusted to a different level. The method 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 adjusted to conform to that in the CIE illuminant C, using a fluorescent reference standard provided by an authorized laboratory, as described in ISO 2470-1. This part of ISO 5631 is not applicable to coloured papers or boards that incorporate fluorescent dyes or pigments.

ISO 5631-3:2014 Referenced Document

ASTM E308-06 Standard Practice for Computing the Colors of Objects by Using the CIE System*， 2024-04-20 Update
CIE 15-2004 Colorimetry (Third Edition; ***For (SDO) Subscription Customers Only ***)
ISO 10526:1999 CIE standard illuminants for colorimetry
ISO 13655:2009 Graphic technology - Spectral measurement and colorimetric computation for graphic arts images
ISO 186:2002 Paper and board - Sampling to determine average quality
ISO 187:1990 Paper, board and pulps; standard atmosphere for conditioning and testing and procedure for monitoring the atmosphere and conditioning of samples
ISO 2469:2007 Paper, board and pulps - Measurement of diffuse radiance factor
ISO 2470-1:2009 Paper, board and pulps - Measurement of diffuse blue reflectance factor - Part 1: Indoor daylight conditions (ISO brightness)
ISO/CIE 10527:1991 CIE standard colorimetric observers

2022 ISO 5631-3:2022 Paper and board — Determination of colour by diffuse reflectance — Part 3: Indoor illumination conditions (D50/2°)
2015 ISO 5631-3:2015 Paper and board - Determination of colour by diffuse reflectance - Part 3: Indoor illumination conditions (D50/2 degrees)
2014 ISO 5631-3:2014 Paper and board - Determination of colour by diffuse reflectance - Part 3: Indoor illumination conditions (D50/2 degrees)
2008 ISO 5631-3:2008 Paper and board - Determination of colour by diffuse reflectance - Part 3: Indoor illumination conditions (D50/2 degrees)