ASTM D3991-94(2012)e1 PDF

1.1 These specifications cover the classification, by fineness grade, of wool or mohair that is in the grease, pulled, washed, or scoured state, or in the form of card sliver.

1.2 These specifications are applicable also to assignment of grade for wool or mohair in spun materials or products processed beyond carding on the woolen system but not on the worsted system which involves a combing process.

Note 1 - For fineness specifications for wool top, mohair top, and alpaca, refer to Specifications D3992 and D2252.