Table 1.
Selected candidate materials for homemade masks.
Table 2.
Definitions and standards of detection indicators.
Fig 1.
Table 3.
Test results of pressure difference and spray rating for single-layer materials.
Table 4.
Test results of particle filtration efficiency of materials for single-layer homemade masks with qualified pressure difference.
Table 5.
Test results of bacterial filtration efficiency of materials for single-layer homemade masks with qualified pressure difference and particle filtration efficiency.
Table 6.
Test results of pressure difference of materials for double-layer homemade masks.
Table 7.
Test results of particle filtration efficiency of materials for double-layer homemade masks with qualified pressure difference.
Table 8.
Test results of bacterial filtration efficiency of materials for double-layer homemade masks with qualified pressure difference and particle filtration efficiency.