If you are an ASTM Compass Subscriber and this document is part of your subscription, you can access it for free at ASTM Compass
    ASTM D4510 - 18

    Standard Test Method for Counting Partial Cleavages in Wool and Other Animal Fibers

    Active Standard ASTM D4510 | Developed by Subcommittee: D13.13

    Book of Standards Volume: 07.02

      Format Pages Price  
    PDF 7 $52.00   ADD TO CART
    Hardcopy (shipping and handling) 7 $52.00   ADD TO CART

    Significance and Use

    5.1 Test Method D4510 for the counting of partial cleavages, may be used for the acceptance testing of commercial shipments of wool and other animal fibers, but caution is advised, since information on between-laboratory precision is limited. Comparative tests as directed in 5.1.1 may be advisable.

    5.1.1 In case of a dispute arising from differences in reported test results when using this test method for acceptance testing of commercial shipments, the purchaser and the supplier should conduct comparative tests to determine if there is a statistical bias between their laboratories. Competent statistical assistance is recommended for the investigation of bias. As a minimum, the two parties should take a group of test specimens that are as homogeneous as possible and that are from a lot of material of the type in question. The test specimens should then be randomly assigned in equal numbers to each laboratory for testing. The average results from the two laboratories should be compared using Students t-test for unpaired data and an acceptable probability level chosen by the two parties before the testing is begun. If a bias is found, either its cause must be found and corrected or the purchaser and the supplier must agree to interpret future test results in the light of the known bias.

    FIG. 1 (A) Partial Cleavage—But do not count if it is at the end of a fiber. The split may have been caused by other means

     (A) Partial Cleavage—But do not count if it
 is at the end of a fiber. The split may have been caused by other

    5.2 Chemically damaged or tendered fibers are recognizable microscopically by qualified operators and should not be counted as partial cleavages. Such fibers exhibit total loss of cuticle, severe surface erosion, tenderizing cracks, longitudinal fibrillation, or a combination of these features (see Figs. 1 and 2). In a study of deliberately over-carbonized wool at one laboratory, it was found that when more than 24 tendered fibers were seen in 1 m, partial cleavage counts were significantly higher than on similar fibers that were not overcarbonized.

    FIG. 1 (B–D) Split Fiber (continued)

     (B–D) Split Fiber (B–D) Split Fiber

    FIG. 2 Fiber With Transverse Cracks

     Fiber With Transverse Cracks Fiber With Transverse Cracks

    1. Scope

    1.1 This test method covers a procedure, using the microprojector, for the counting of partial cleavages in wool and other animal fibers.

    1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

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

    1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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

    Other Document

    Wool Products Labeling Act of 1939 Act of Congress

    ASTM Standards

    D123 Terminology Relating to Textiles

    D2258 Practice for Sampling Yarn for Testing

    D2525 Practice for Sampling Wool for Moisture

    D4845 Terminology Relating to Wool

    ICS Code

    ICS Number Code 59.060.10 (Natural fibres)

    UNSPSC Code

    UNSPSC Code 11151508(Wool fibers)

    Referencing This Standard
    Link Here
    Link to Active (This link will always route to the current Active version of the standard.)

    DOI: 10.1520/D4510-18

    Citation Format

    ASTM D4510-18, Standard Test Method for Counting Partial Cleavages in Wool and Other Animal Fibers, ASTM International, West Conshohocken, PA, 2018, www.astm.org

    Back to Top