Comparison of Identifying Fiber Characteristics
| Material | S. G. | Melt Point | Usual Physical Appearance |
| Polypropylene | 0.91 | 170°C | Course bristle or tape-like colored fiber. Also fine white fiber. |
| Polyethylene | 0.93 | 135°C | Course white or colored fiber. |
| HMPE | 0.96 | 135°C | Very fine white fiber |
| Nylon 6 | 1.14 | 219°C | Very fine white fiber |
| Nylon 6.6 | 1.14 | 254°C | Very fine white fiber |
| Polyester | 1.38 | 256°C | Very fine white fiber |
| LCAP | 1.41 | 330°C | Very fine yellow-brown fiber. |
| Aramid | 1.44 | chars at ~ 450°C | Very fine golden yellow fiber. |
| February 23, 2003 | |||
