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    ASTM D204 - 02(2021)

    Standard Test Methods for Sewing Threads

    Active Standard ASTM D204 | Developed by Subcommittee: D13.58

    Book of Standards Volume: 07.01

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    Significance and Use

    4.1 Acceptance Testing—The test methods in Test Methods D204 for the determination of the properties of sewing thread are considered satisfactory for acceptance testing of commercial shipments of sewing thread, unless specified in the individual test method. These test methods are the best available and are used extensively in the trade.

    4.1.1 If there are differences of practical significance between reported test results for two laboratories (or more) comparative test should be performed to determine if there is a statistical bias between them using competent statistical assistance. As a minimum, use the samples for such a comparative tests that are as homogeneous as possible, drawn from the same lot of material as the samples that resulted in disparate results during initial testing and randomly assigned in equal numbers to each laboratory. The test results from the laboratories involved should be compared using a statistical test for unpaired data, a probability level chosen prior to the testing series. If a bias is found, either its cause must be found and corrected, or future test results for that material must be adjusted in consideration of the known bias.

    1. Scope

    1.1 These test methods can be used to evaluate sewing threads of any fiber.

    1.1.1 The test methods in this standard are intended to evaluate only sewing thread taken from thread holders.

    1.2 These test methods only provide for the measurement of sewing thread physical properties. These test methods do not address any other properties that may be important for the satisfactory performance of sewing threads under particular end use conditions.

    1.3 These test methods can be used to measure the following properties:



    Colorfastness to Drycleaning

    73 – 83

    Colorfastness to Laundering

    62 – 72

    Colorfastness to Water Migration

    84 – 94


    43 – 50

    Length per Thread Holder

    34 – 42

    Shrinkage, Single Strand

    51 – 61

     Dry Heat


     Boiling Water


    Strength and Elongation

    15 – 21

     Single Strand—Conditioned


     Single Strand—Wet


     Loop Strength


     Knot Strength



    22 – 27

    Twist Balance

    28 – 33

    Yarn Number

    7 – 14

    Note 1: For methods covering tests on prepared seams, refer to Test Methods D1683/D1683M and D3940.

    1.4 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard.

    1.5 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.

    1.6 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

    D1422/D1422M Test Method for Twist in Single Spun Yarns by the Untwist-Retwist Method

    D1423/D1423M Test Method for Twist in Yarns by Direct-Counting

    D1683/D1683M Test Method for Failure in Sewn Seams of Woven Fabrics

    D1776/D1776M Practice for Conditioning and Testing Textiles

    D1777 Test Method for Thickness of Textile Materials

    D1907/D1907M Test Method for Linear Density of Yarn (Yarn Number) by the Skein Method

    D2256/D2256M Test Method for Tensile Properties of Yarns by the Single-Strand Method

    D2258/D2258M Practice for Sampling Yarn for Testing

    D2724 Test Method for Bond Strength of Bonded, Fused, and Laminated Apparel Fabrics

    D3693 Specification for Labeled Length per Holder of Sewing Thread

    D3823 Practice for Determining Ticket Numbers for Sewing Threads

    D3940 Test Method for Bursting Strength (Load) and Elongation of Sewn Seams of Knit or Woven Stretch Textile Fabrics

    D4848 Terminology Related to Force, Deformation and Related Properties of Textiles

    D4849 Terminology Related to Yarns and Fibers

    ICS Code

    ICS Number Code 59.080.20 (Yarns)

    UNSPSC Code

    UNSPSC Code 11150000(Fibers and threads and yarns); 41114707(Textile or paper strength tester)

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

    DOI: 10.1520/D0204-02R21

    Citation Format

    ASTM D204-02(2021), Standard Test Methods for Sewing Threads, ASTM International, West Conshohocken, PA, 2021, www.astm.org

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