| Material |
Min. |
Max. |
| Air |
1 |
1 |
| Amber |
2.6 |
2.7 |
| Asbestos fiber |
3.1 |
4.8 |
| Bakelite |
5 |
22 |
| Barium Titanate |
100 |
1250 |
| Beeswax |
2.4 |
2.8 |
| Cambric |
4 |
4 |
| Carbon Tetrachloride |
2.17 |
2.17 |
| Celluloid |
4 |
4 |
| Cellulose Acetate |
2.9 |
4.5 |
| Durite |
4.7 |
5.1 |
| Ebonite |
2.7 |
2.7 |
| Epoxy Resin |
3.4 |
3.7 |
| Ethyl Alcohol |
6.5 |
25 |
| Fiber |
5 |
5 |
| Formica |
3.6 |
6 |
| Glass |
3.8 |
14.5 |
| Glass Pyrex |
4.6 |
5 |
| Gutta Percha |
2.4 |
2.6 |
| Isolantite |
6.1 |
6.1 |
| Kevlar |
3.5 |
4.5 |
| Lucite |
2.5 |
2.5 |
| Mica |
4 |
9 |
| Micarta |
3.2 |
5.5 |
| Mycalex |
7.3 |
9.3 |
| Neoprene |
4 |
6.7 | |
| Material |
Min. |
Max. |
| Nylon |
3.4 |
22.4 |
| Paper |
1.5 |
3 |
| Paraffin |
2 |
3 |
| Plexiglass |
2.6 |
3.5 |
| Polycarbonate |
2.9 |
3.2 |
| Polyethylene |
2.5 |
2.5 |
| Polyimide |
3.4 |
3.5 |
| Polystyrene |
2.4 |
3 |
| Porcelain |
5 |
6.5 |
| Quartz |
5 |
5 |
| Rubber |
2 |
4 |
| Ruby Mica |
5.4 |
5.4 |
| Selenium |
6 |
6 |
| Shellac |
2.9 |
3.9 |
| Silicone |
3.2 |
4.7 |
| Slate |
7 |
7 |
| Soil dry |
2.4 |
2.9 |
| Steatite |
5.2 |
6.3 |
| Styrofoam |
1.03 |
1.03 |
| Teflon |
2.1 |
2.1 |
| Titanium Dioxide |
100 |
100 |
| Vaseline |
2.16 |
2.16 |
| Vinylite |
2.7 |
7.5 |
| Water distilled |
34 |
78 |
| Waxes, Mineral |
2.2 |
2.3 |
| Wood dry |
1.4 |
2.9 | |