Standard Specifications for Fineness of Wool or Mohair and Assignment of Grade (Withdrawn 2021)
Standard Specifications for Fineness of Wool or Mohair and Assignment of Grade (Withdrawn 2021)D3991-94R12E01ASTM|D3991-94R12E01|en-USStandard Specifications for Fineness of Wool or Mohair and Assignment of Grade (Withdrawn 2021)StandardD3991 Standard Specifications for Fineness of Wool or Mohair and Assignment of Grade (Withdrawn 2021)>newBOS Vol. 07.01 Committee D13
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Significance and Use
These specifications are considered satisfactory for classifying wool or mohair by grade and provide a basis for acceptance of commercial shipments.
Grade determined by visual examination is a common trade practice. In case of doubt or dispute, comparison of the measured average fiber diameter and fiber diameter standard deviation with the respective specification shall be used as the referee procedure for assigning grade.
This specification is not intended for application to mixed lots, that is, lots of wool or mohair consisting of fleeces of different grades that are to be segregated into smaller more homogeneous lots before use.
Scope
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.
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