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  • ASTM
    D3991-94(2012)e1 Standard Specifications for Fineness of Wool or Mohair and Assignment of Grade
    Edition: 2012
    $144.00
    Unlimited Users per year

Description of ASTM-D3991 2012

ASTM D3991 - 94(2012)e1

Standard Specifications for Fineness of Wool or Mohair and Assignment of Grade

Active Standard ASTM D3991 | Developed by Subcommittee: D13.13

Book of Standards Volume: 07.01




ASTM D3991

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.

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


2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

D123 Terminology Relating to Textiles

D2130 Test Method for Diameter of Wool and Other Animal Fibers by Microprojection

D2252 Specification for Fineness of Types of Alpaca

D3992 Specifications for Fineness of Wool Top or Mohair Top and Assignment of Grade

D4845 Terminology Relating to Wool

Federal Standards

MeasurementMethodfor

Keywords

animal fibers (except wool); number grade; wool; yarn;


ICS Code

ICS Number Code 59.060.10 (Natural fibres)


DOI: 10.1520/D3991-94R12E01

ASTM International is a member of CrossRef.

ASTM D3991



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