ASTM D2130

This test method specifies a sampling and testing procedure for the measurement of average fiber diameter and variation in diameter of animal fibers as required in Test Method D 2968.

Test Method D 2130 for testing wool and other animal fibers for average fiber diameter is considered satisfactory for acceptance testing of commercial shipments since current estimates of between-laboratory precision are acceptable and the method has been used extensively in the trade for acceptance testing. In cases of disagreement arising from differences in values reported by the purchaser and the seller when using this method for acceptance testing, the statistical bias, if any, between the laboratory of the purchaser and the laboratory of the seller should be determined with each comparison being based on the testing of specimens randomly drawn from one sample of material of the type being evaluated.

1. Scope

1.1 This test method covers a procedure, using the microprojector, for the determination of the average fiber diameter and the fiber diameter variation on wool and other animal fibers, such as mohair, cashmere, alpaca, camel's hair, etc. (Note 1) in their various forms.

1.2 The values stated in inch-pound units are to be regarded as the standard. The metric equivalents of inch-pound units may be approximate.

Note 1—This test method may also be applied to any fibers having a round cross section and accordingly may be used many times for melt-spun man-made fibers such as polyamides, polyesters, and glass; also it may be applied to a limited number of polyacrylics and regenerated cellulose type fibers. The values given in Appendix X1 for density and correction factors, however, apply only to wool and should not be used for other fibers. For suitable values for the density of other fibers, see Table 5 in Test Methods D 629, Quantitative Analysis of Textiles.

Note 2—In subsequent sections of this test method, the term “wool” also signifies mohair or other fibers if the circumstances are applicable.

Note 3—For fineness specifications for wool, wool top, mohair, mohair top, alpaca, and cashmere, refer to Specifications D 3991 and D 3992, Specification D 2252, Test Method D 2816.

1.3 This standard does not purport to address the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

2. Referenced Documents

D1060 Practice for Core Sampling of Raw Wool in Packages for Determination of Percentage of Clean Wool Fiber Present
D123 Terminology Relating to Textiles
D1776 Practice for Conditioning Textiles for Testing
D2252 Specification for Fineness of Types of Alpaca
D2258 Practice for Sampling Yarn for Testing
D2816 Test Method for Cashmere Coarse-Hair Content in Cashmere
D2968 Test Method for Med and Kemp Fibers in Wool and Other Animal Fibers by Microprojection
D3510 Test Method for Diameter of Wool and Other Animal Fibers by Image Analyzer
D3991 Specification for Fineness of Wool or Mohair and Assignment of Grade
D3992 Specification for Fineness of Wool Top or Mohair Top and Assignment of Grade
D584 Test Method for Wool Content of Raw Wool-Laboratory Scale
D629 Test Methods for Quantitative Analysis of Textiles
E380 Practice for Use of the International System of Units (SI) (the Modernized Metric System)
Federal Standard, Official Standard of the United States for Grades of Wool, Section 31.0, Measurement Method for Determining Grade of Wool, Section 31.204
IWTO-8-66(E) Method of Determining Wool Fiber Diameter by the Projection Microscope

Index Terms

animal fibers (except wool); diameter; wool; Animal fibers; Diameter--textile fabrics/fibers; Man-made textile fibers; Microprojection; Wool and wool top--fiber diameter; ICS Number Code 59.060.10

Citing ASTM Standards

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