GB/T 7973-2003 "Paper, board and pulps - Measurement of diffuse reflectance factor (diffuse/vertical method)" specifies the measurement of the diffuse reflectance factor of paper, board, and pulps using the diffuse/vertical method. It is applicable to various related materials, including samples containing fluorescent whitening agents. The standard employs the D65 standard illuminant and a 10° standard observer, with barium sulfate whiteboard as the reference. It clearly outlines instrument calibration, specimen preparation, and testing procedures to ensure the accuracy and comparability of diffuse reflectance factor measurement results.
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 | 2003-10-20 00:00:00 | Implementation Date | 2004-06-01 00:00:00 |