What is ISO 5631-2 - Outdoor daylight conditions about?
ISO 5631-2 is the second part of the multi-series standard that is applicable to paper and board.
ISO 5631-2 specifies a method for measuring the colour of paper and board by the diffuse reflectance method with the elimination of specular gloss.
ISO 5631-2 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 colourimetric 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.
Note-
ISO 5631-2 is not applicable to coloured papers or boards that incorporate fluorescent dyes or pigments.
Who is ISO 5631-2 - Outdoor daylight conditions for?
ISO 5631-2 on outdoor daylight conditions is useful for:
- Paper and paperboard manufacturing companies
- Suppliers and distributors for paper and board
- Laboratories for paper and board
Why should you use ISO 5631-2 - Outdoor daylight conditions?
The colour of an object can be uniquely characterized by means of a triplet of colour coordinates such as the CIE X,Y,Z tristimulus values or the CIELAB 1976 L*, a*, b* coordinates, for a specified CIE illuminant and CIE standard observer.
ISO 5631-2 describes the measurement and description of colour in terms of the CIE standard illuminant D65 and the CIE 1964 (10°) standard observer. The analogous measurement and description of colour in terms of the CIE illuminant C and the CIE 1931 (2°). Also, describes the measurement and description of colour in terms of the CIE illuminant D50 and the CIE 1931 (2°) standard observer.
ISO 5631-2 helps you to the comparison of papers in graphic arts situations.
What’s changed since the last update?
BS ISO 5631-2:2015 supersedes BS ISO 5631-2:2014 which is withdrawn.