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About This Item
Full Description
This International Standard specifies a method for measuring the colour of paper and board by the diffuse reflectance method with the elimination of specular gloss.
This International Standard 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 provided by an authorized laboratory as described in ISO 2470.
Document History
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ISO 5631-1:2022
Paper and board - Determination of colour by diffuse reflectance - Part 1: Indoor daylight conditions (C/2°)- Most Recent
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ISO 5631-1:2015
Paper and board - Determination of colour by diffuse reflectance - Part 1: Indoor daylight conditions (C/2 degrees)- Historical Version
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ISO 5631-1:2009
Paper and board - Determination of colour by diffuse reflectance - Part 1: Indoor daylight conditions (C/2 degrees)- Historical Version
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ISO 5631:2000
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Paper and board - Determination of colour (C/2 degrees) - Diffuse reflectance method- Historical Version