GB/T 458-2008 "Determination of air permeability of paper and board" specifies the method for determining the air permeability of paper and board, applicable to various types of paper and board. The standard calculates air permeability by measuring the volume of air passing through a unit area of the sample per unit time under a specific pressure difference. It clarifies requirements for sample preparation, conditioning, instrument calibration, and testing procedures. This standard provides a unified method for evaluating the air permeability of paper and ensures the comparability of test results across different laboratories.
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 | 2008-08-19 00:00:00 | Implementation Date | 2009-05-01 00:00:00 |
