| Items | Unit | Inspection Methods |
Grade A | Tolerance | |||
| Grammage | ㎡ | GB/T451.2 | 58 | 64 | 70 | 80 | ±3% |
| Bulk | cm³/g | GB/T451 | 0.89 | 0.89 | 0.88 | 0.88 | ±4% |
| Smoothness | s | GB/T456 | 900 | 900 | 900 | 900 | ±300 |
| Glossiness | % | GB/T8941.3 | 43 | 43 | 43 | 43 | ±8 |
| Brightness | %ISO | GB/T7974 | 84.0 | 84.0 | 84.0 | 84.0 | ±2 |
| Opacity | % | GB/T1543 | 89.5 | 92.0 | 93.0 | 95.0 | ±2 |
| Moisture | % | GB/T462 | 5 | 5 | 5 | 5 | ±1.5 |
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