Table 8.
Questionnaire results of photocatalytic prototype masks on appearance, filtration effect and comfort.
| Evaluation | Excellent | Good | General | Poor | Very poor |
|---|---|---|---|---|---|
| Appearance/ per | 2 | 7 | 9 | 7 | 5 |
| Filtration effect / per | 4 | 11 | 10 | 2 | 3 |
| Comfort/ per | 8 | 10 | 8 | 3 | 1 |
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