1.1 This test method covers the determination of the bulking factor of spinning grade fiber. These include grade 4A and longer.1.2 Results obtained on other grades may be considered as an evaluation of their bulk fiber resilience.1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.1.4 Warning-Breathing of asbestos dust is hazardous. Asbestos and asbestos products present demonstrated h