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Filtering efficiency of PTCMs against PM2.5.
| S. N. | Cloth masks (PTCMs) | Without filtration (μg/m3) mean ± S.D | With filtration (μg/m3) mean ± S.D | TIL (%) | Efficiency (%) |
|---|---|---|---|---|---|
| 1. | PTCM 1 | 41.64 ± 2.1 | 13.49 ± 3.34 | 32 | 68 |
| 2. | PTCM 2 | 34.72 ± 1.59 | 13.1 ± 1.31 | 38 | 62 |
| 3. | PTCM 3 | 57.38 ± 2.73 | 21.7 ± 2.59 | 38 | 62 |
| 4. | PTCM 4 | 36.31 ± 1.62 | 17.01 ± 2.07 | 47 | 53 |
| 5. | PTCM 5 | 45.31 ± 6.26 | 19.61 ± 7.86 | 43 | 57 |
