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    ASTM D2257 - 20

    Standard Test Method for Extractable Matter in Textiles

    Active Standard ASTM D2257 | Developed by Subcommittee: D13.51

    Book of Standards Volume: 07.01

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    Significance and Use

    5.1 This test method may be used for acceptance testing of commercial shipments.

    5.1.1 In case of a dispute arising from differences in reported test results 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 the laboratories. Competent statistical assistance is recommended for the investigation of bias. As a minimum, the two parties should take a group of test specimens which are as homogeneous as possible and which 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 appropriate statistical analysis and a probability level chosen by the two parties before the testing begins. If a bias is found, either its cause must be found and corrected, or the purchaser and supplier must agree to interpret future test results with consideration to the known bias.

    5.2 This test method is used for the determination of the amounts of naturally present oily or waxy impurities that have not been completely removed from textiles made from animal fibers, and for the determination of the amounts of oily or waxy finishing materials applied to raw materials or textiles during manufacture. See 3.1.1, extractable matter.

    5.3 The test method may be used as a step in the determination of the commercial weight of fiber, yarn, and textile shipments.

    5.4 The International Wool Textile Organization specifies the use of a halogenated hydrocarbon, dichloromethane, also called methylene chloride (CH2Cl2) instead of the solvent specified in this test method (IWTO-10-62(E)).

    5.5 Extractables by mass loss is frequently used for textiles which have a relatively large amount of extractable material to effect a significant mass change.

    1. Scope

    1.1 This test method covers a procedure for determining the extractable material on most fibers, yarns, and fabrics. Three options are included. Option 1 uses heat and Soxhlet extraction apparatus. Option 2 uses room temperature and extraction funnels. Option 3 uses either Option 1 or Option 2 extraction but provides for calculation of extractable matter from the loss in mass of the material due to the extraction rather than the extractable matter residue.

    Note 1: Other standards for the determination of extractable matter in textiles made of specific fibers include: Specification D541, Specification D681, and Test Method D1574.

    1.1.1 The solvents for use in this method are any solvents that the party or parties concerned agreed on; such as, Halogenated Hydrocarbon (HH) chloroform, tetrachloroethane, alcohol (isopropyl or methyl).

    1.1.2 This test method may not extract cross-linked finishes or resins which may be on the textile.

    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. See Sections 6 and 7.

    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

    D541 Specification for Single Jute Yarn

    D681 Specification for Jute Rove and Plied Yarn for Electrical and Packing Purposes

    D1574 Test Method for Extractable Matter in Wool and Other Animal Fibers

    D1909 Standard Tables of Commercial Moisture Regains and Commercial Allowances for Textile Fibers

    D2258 Practice for Sampling Yarn for Testing

    D3333 Practice for Sampling Manufactured Staple Fibers, Sliver, or Tow for Testing

    D4920 Terminology Relating to Conditioning, Chemical, and Thermal Properties

    Other Documents

    IWTO10-62(E) Method for Determination of the Dichloromethane Soluble Matter in Combed Wool Sliver Available from International Wool Secretariat, Carlton Gardens, London S.W. 1, England.

    ICS Code

    ICS Number Code 59.080.20 (Yarns)

    UNSPSC Code

    UNSPSC Code 11161800(Synthetic fabrics)

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

    DOI: 10.1520/D2257-20

    Citation Format

    ASTM D2257-20, Standard Test Method for Extractable Matter in Textiles, ASTM International, West Conshohocken, PA, 2020, www.astm.org

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