The Micronaire and Port-Ar airflow instruments are in use in this country for the determination of the average fiber diameter of wool fibers. The results from these instruments were compared with those from three laboratories which had determined the average fiber diameter on 90 wool top samples by the microprojection method. Results from the analysis of variance indicate that either instrument can be used equally well for determination of mean wool-fiber diameter.
American Society for Testing and Materials, ASTM Standards, Part 25, October 1969: Standard Method of Test for Diameter of Wool and Other Animal Fibers by Microprojection, ASTM Designation (a) D 2130-69; (b) Standard Method of Test for Resistance to Air Flow as an Indication of Average Fiber Diameter of Wool Top, Card Sliver, and Scoured Wool, D 1282-66.
2.
Application of the Micronaire for Measuring Fineness of Wool, July 1951, Wool Standards Laboratory, Wool Division, U.S.D.A.
3.
Hourihan, M.E. , Terrill, C.E., Neil, H.G., and Mackey, B.E., Wool Top Analysis by an Electronic Fiber Fineness Instrument, Textile Res. J.40, (1970).
4.
Special Instruments Laboratory, Inc., Instruction Manual, Port-Ar, Knoxville, Tennessee.
