GB/T 22879-2008 "Paper and board - Determination of CIE whiteness, C/2° (indoor illumination conditions)" specifies the method for determining the CIE whiteness of paper and board under indoor illumination conditions using C standard illuminant and 2° standard observer. It is applicable to white paper and board, with or without fluorescent whitening agents. The CIE whiteness value is calculated by measuring the diffuse reflectance factor of the sample. The standard clarifies instrument calibration and sample handling requirements to ensure the accuracy of whiteness determination in indoor environments.
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 | 85.010 |
| Release Date | 2008-12-30 00:00:00 | Implementation Date | 2009-09-01 00:00:00 |
