Table 1.
The porosity of various materials [2].
| Material | Porosity |
|---|---|
| Agar–agar | 0.57–0.66 |
| Black slate powder | 0.12–0.34 |
| Brick | 0.45 |
| Catalyst (Fischer–Tropsch, granules only) | |
| Cigarette | 0.17–0.49 |
| Cigarette filters | 0.02–0.12 |
| Coal Concrete (ordinary mixes) | ~0.10 |
| Concrete (bituminous) | |
| Copper powder (hot-compacted) | 0.09–0.34 |
| Corkboard | |
| Fiberglass | 0.88–0.93 |
| Granular crushed rock | 0.45 |
| Hair (on mammals) | 0.95–0.99 |
| Hair felt | |
| Leather | 0.56–0.59 |
| Hair felt limestone (dolomite) | 0.04–0.10 |
| Leather | 0.37–0.50 |
| Sand sandstone (“oil sand”) | 0.08–0.38 |
| Silica grains | 0.65 |
| Silica powder | 0.37–0.49 |
| Soil | 0.43–0.54 |
| Spherical packings (shaken well) | 0.36–0.43 |
| Wire crimps | 0.68–0.76 |