1.1 This test method covers the determination of the fiber content of resin-matrix composites. The technique used is based on the digestion of the matrix resin by liquid media, which do not attack the fibers excessively.

1.2 This standard may involve hazardous materials, operations, and equipment. This standard does not purport to address all of the safety problems 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 statements see Section 7.

1.3 The values in SI units are to be regarded as the standard.