The value of compression (as described in 9.5) is proportional to the bulk under moderate pressure.

The value of percent recovery is a measure of springiness or bulk fiber resilience.

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 health risks for users and for those with whom they come into contact. In addition to other precautions, when working with asbestos-cement products, minimize the dust that results. For information on the safe use of chrysoltile asbestos, refer to "Safe Use of Chrysotile Asbestos: A Manual on Preventive and Control Measures."

This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For specific hazard warning, see .