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    ASTM D2252 - 18

    Standard Specification for Fineness of Types of Alpaca

    Active Standard ASTM D2252 | Developed by Subcommittee: D13.13

    Book of Standards Volume: 07.01

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    This specification is applicable in the classification of alpaca into types according to fineness. Five types of alpaca have been classified according to its average diameter limit, namely Type T Extra, Type T, Type X, Type AA, Type A, Type SK, and Type LP.

    This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.

    Significance and Use

    4.1 This specification for fineness is intended as a guide for production, preparation, and marketing (Note 1) by comparing the average fiber diameter of a measured specimen with the fineness specifications for the various types listed in Table 1. The standard deviation which expresses measured variability of a specimen may be compared with the average shown in Table X2.1.

    Note 1: Test Method D2130 does not include any values for the precision to be expected in the testing of alpaca fibers. In an interlaboratory test in which six laboratories each made one test on each of six type samples, HTB-CB, HAXB-CB, HAAB-CB, HAB-CB, HLPB-CL, and HSKB-CL, the coefficient of variation of the average fiber diameters between laboratories, including test variation, was 3.2, 4.7, 3.8, 4.5, 2.2, and 0.93 % for the respective alpaca types.

    1. Scope

    1.1 This specification is applicable in the classification of alpaca into types according to fineness.

    1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered 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.

    ASTM Standards

    D123 Terminology Relating to Textiles

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

    D4845 Terminology Relating to Wool

    ICS Code

    ICS Number Code 59.060.10 (Natural fibres)

    UNSPSC Code

    UNSPSC Code 11151500(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/D2252-18

    Citation Format

    ASTM D2252-18, Standard Specification for Fineness of Types of Alpaca, ASTM International, West Conshohocken, PA, 2018, www.astm.org

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