GB/T 7975-2005 "Paper and board - Measurement of colour (Diffuse reflectance method)" specifies the method for measuring the colour of paper and board using the diffuse reflectance technique. It is applicable to all types of paper and board, including materials containing fluorescent whitening agents. The method employs the D65 standard illuminant and the 10° standard observer to measure the tristimulus values of the sample and calculate the chromaticity parameters. It clearly defines instrument calibration, sample preparation, and testing conditions, providing a unified approach for evaluating the colour of paper and board.
This summary is not the original standard text and is for reference only. For accurate information, please obtain it through official channels.
| Status | Active | ||
|---|---|---|---|
| CCS | Y30 | ICS | 85.060 |
| Release Date | 2005-09-26 00:00:00 | Implementation Date | 2006-04-01 00:00:00 |
