GB/T 1543-2005 "Paper and board—Determination of opacity (paper backing)—Diffuse reflectance method" specifies the diffuse reflectance method for determining the opacity of paper and board using paper backing, which is applicable to all types of paper and board. The opacity value is calculated by measuring the diffuse reflectance factor of the specimen when backed by a pile of the same paper. The standard defines instrument parameters, specimen handling, and test procedures to ensure the accuracy and comparability of opacity 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 | 2005-09-26 00:00:00 | Implementation Date | 2006-04-01 00:00:00 |