Table 1.
Filterability for 0.1 μm particles in new and regenerated masks [2], tested per China National Standard GB 2626–2006.
| Mask type | Status | Sample size | Mean (range) filterability for 0.1 μm particles (%) | Example photographs |
|---|---|---|---|---|
| KF94 (Air Puri) | New | 3 | 98.6 (97.4–99.9) |  |
| Regenerated, 1 cycle | 3 | 98.1 (97.7–98.5) |  |
|
| Disposable medical (Hubei Lexin) | New | 5 | 46.5 (45.8–46.8) |  |
| Regenerated, 1 cycle | 5 | 46.0 (44.3–47.2) |  |
|
| Disposable surgical (Henan Yubei) | New | 5 | 76.9 (73.9–78.5) |  |
| Regenerated, 1 cycle | 5 | 75.5 (74.9–77.0) |  |
|
| Regenerated, 10 cycles | 5 | 76.2 (73.7–77.9) |  |