ASTM D5103-07(2012)

1.1 This test method covers the determination of average staple length and staple length distribution of both manufactured and natural fibers by manually measuring single fiber lengths. This test method is also used to measure the length of fibers removed from a staple yarn, but such a measurement may not represent the fiber's staple length, as manufactured.

1.2 Because this test method requires measuring the length of only 50 fibers, it is not suitable for use in determining the number of long fibers that occur infrequently in a sample.

Note 1 - For determination for overlength fibers, refer to Test Method D3513.

Note 2 - For methods covering the determination of the average length and length distribution of natural fibers, refer to the following methods: for cotton, Test Method D1440, and Test Method D1447, for wool, Test Method D519, Test Method D1234, and Test Method D1575.

1.3 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.