Table 1. Properties of all tested filters.
| Type | Material | Pore spacing | Thickness | Area | Pore size | N pores | Porosity |
| um | mm∧2 | um | ×1000 | % | |||
| Track-etched | PC | Random | 10 | 102.1 | 5 | 350.9 | 6.7 |
| “ | 8 | 91.8 | 4.5 | ||||
| “ | 10 | 88.2 | 6.8 | ||||
| Microsieve | Si3N4 | Regular | 1 | 0.6 | 5 | 0.16 | 0.5 |
| 6.2 | 5 | 115.4 | 36.5 | ||||
| 2.7 | 5 | 25.9 | 18.8 | ||||
| “ | 6 | 17.9 | 18.7 | ||||
| “ | 7 | 15.2 | 21.7 | ||||
| “ | 8 | 11.8 | 22.0 | ||||
| “ | 9 | 9.4 | 22.1 | ||||
| “ | 10 | 7.4 | 21.5 | ||||
| TEM grid | Copper | Regular | 18 | 2.6 | 7½ | 17.4 | 36.0 |
| Nickel | “ | “ | “ | “ |
PC: PolyCarbonate, Si3N4: Silicon Nitride, TEM: transmission electron microscopy, TEM grid pores are square, others are round.