The average fiber diameter of scoured mohair determined by a Port-Ar2 air-flow instrument was compared with that obtained by the short fiber measurement (microprojection) method. Samples from 52 lots of scoured mohair representing eight grades and ranging from 23.55 μ to 38.50 μ in average fiber diameter were tested. The over-all correlation coefficient between the average fiber diameter of the Port-Ar and the short fiber methods was r = + 0.98. However, when seg mented into groups ranging 4 μ in average fiber diameter, the correlation coefficients were: 23.1-27.0 μ, r = + 0.94; 27.1- 31.0 μ, r = + 0.94; 31.1-35.0 μ, r = + 0.85; and 35.1-39.0 μ, r = + 0.77.
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References
1.
American Society for Testing and Materials, ASTM Designations: (a) D-1282-66, (b) D-1448-68, (c) D-2130-72, Philadelphia, Pa.
2.
Hourihan, M.E. , Terrill, C.E., and Wilson, R.L., Comparison of Methods for Estimating Fiber Fineness, Textile Res. J.40, 937 -940 (1970).
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International Wool Textile Organization, Method of Test for Determining the Mean Diameter of Wool Fibers by the Air-Flow Apparatus (1966).
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United States Department of Agriculture, Standards for Grades of Grease Mohair, Federal Register , Vol. 36, 12681-12685 (1971).
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United States Department of Agriculture, P&MA, Livestock Branch, Application of the Micronaire for Measuring Fineness of Wool (1951).
