1.1 本试验方法涵盖了测定包装形式的所有类型纱线的线密度，并受尺寸和拉伸的限制 1.2 和 1.3 . 规定了在所有传统纱线编号系统中表示纱线线密度。 1.2 本试验方法适用于拉伸小于5的纱线 % 当纱线上的张力从0.25增加到0.75 cN/tex[0.25到0.75 gf/tex]时。经双方同意，并使用低于规定的卷绕张力，该方法也可适用于测量拉伸超过5%的纱线的线密度 %, 在上述力的作用下。 1.3 该方法适用于细于2000 tex的纱线。但是，也可以通过使用短于规定长度的骨架和利益相关方同意的替代缫丝条件来适应较粗的纱线。 1.4 根据用于计算被测纱线含水量的程序及其实际含水量或整理剂含量或两者，可以使用以下一个或多个选项。 1.4.1 未纺纱线: 选项1 -测试纺织品时与标准大气平衡的纱线。 选项2 -烘干纱线。 选项3 -烘干纱线，加上商业回潮率。 1.4.2 水洗纱线: 选项4 -在与标准大气平衡的条件下对纱线进行冲刷，以测试纺织品。 选项5 -烘干、擦洗的纱线。 选项6 -烘干、擦洗的纱线，加上商业回潮率。 选项7 -烘干、擦洗的纱线，加上商业余量（商业回潮率，加上整理余量）。 1.5 用于测定纱线线密度的试样也可用于测定纱线的骨架断裂强度。 因此，该方法提供了确定这两种纱线性能所需遵循的步骤序列。 注1: 用黄麻或玻璃生产的纱线的线密度也可以通过以下批准的方法确定:规范 D541 , D578/D578M 和 D681 . 短纱线段的线密度（从织物上散开）可通过试验方法确定 D1059号 . 1.6 以国际单位制或英寸-磅单位表示的数值应单独视为标准值。每个系统中规定的值可能不是精确的等效值；因此，每个系统应相互独立使用。将两个系统的值合并可能会导致不符合标准。 1.7 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.8 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 5.1 试验方法 D1907/D1907M 被认为是令人满意的商业货运验收测试，因为它已在贸易中广泛用于此目的。 5.1.1 如果因使用测试方法时报告的测试结果的差异而产生争议 D1907/D1907M 对于商业装运的验收测试，买方和供应商应进行比较测试，以确定其实验室之间是否存在统计偏差。 5.1. 2. 建议提供适当的统计协助来确定这种偏差。作为最低要求，双方应尽可能均匀地从相同批次的材料中抽取一组试样。然后，应将试样以相同数量随机分配给每个实验室进行测试。两个实验室的平均结果应使用未配对数据的统计分析进行比较，并在测试开始前由双方选择可接受的概率水平。如果发现偏差，必须确定并纠正其原因，或者买方和供应商必须同意在考虑已知偏差的情况下解释该材料的未来测试结果。 5.2 本试验方法主要用于测定纱线的平均线密度。 然而，由结果确定的变化也可能提供有用的信息。如果要计算变异系数，则必须单独称量每个骨架，并且需要测试更多的骨架（与仅用于测定平均纱线线密度的待测试骨架数量相比）。 5.3 该测试方法包括七种选择，取决于纱线在称重前是否经过擦洗，在调节或烘干状态下称重，或者所得结果是否针对商业回潮率或商业余量进行了调整。选项1（无纺、调理纱）通常用于在棉花系统上纺制的纱线，而选项6和7（擦洗、烘干纱，加上商业回潮率或余量）通常用于长丝纱或含有羊毛纤维的纱线。 在任何情况下使用的具体选项应由双方商定，或按照试验方法或公差中的规定。 5.4 在选项2、3、5、6和7中，通过在标准纺织品测试条件下将纱线暴露在具有空气供应的烘箱中获得烘箱干燥样品，如中所述 6.3 .

1.1 This test method covers the determination of the linear density of all types of yarn in package form, subject to the limitations of size and stretch given in 1.2 and 1.3 . Provision is made for expressing yarn linear density in all the traditional yarn numbering systems. 1.2 This test method is applicable to yarns that stretch less than 5 % when tension on the yarn is increased from 0.25 to 0.75 cN/tex [0.25 to 0.75 gf/tex]. By mutual agreement, and use of a lower than specified reeling tension, this method may also be adapted to measure the linear density of yarns that stretch more than 5 %, under the above force. 1.3 This method is applicable to yarns finer than 2000 tex. However, it may be also adapted to coarser yarns by the use of skeins of shorter than specified lengths, and alternate reeling conditions, agreeable to the interested parties. 1.4 Depending on the procedure used to calculate the moisture content of the yarn being tested, and its actual moisture content, or finish content, or both, one or more of the following options may be utilized. 1.4.1 Unscoured Yarn: Option 1 —Yarn at equilibrium with the standard atmosphere for testing textiles. Option 2 —Oven-dried yarn. Option 3 —Oven-dried yarn, plus commercial moisture regain. 1.4.2 Scoured Yarn: Option 4 —Scoured yarn at equilibrium with the standard atmosphere for testing textiles. Option 5 —Oven-dried, scoured yarn. Option 6 —Oven-dried, scoured yarn, plus commercial moisture regain. Option 7 —Oven-dried, scoured yarn, plus commercial allowance (commercial moisture regain, plus an allowance for finish). 1.5 Specimens used to determine yarn linear density may also be used to determine the skein breaking strength of the yarn. Hence, this method provides the sequence of steps to be followed, to determine both these yarn properties. Note 1: The linear density of yarns produced with jute, or glass, may also be determined by the following approved methods: Specifications D541 , D578/D578M , and D681 . The linear density of short yarn segments, raveled from fabrics, may be determined by Test Method D1059 . 1.6 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. 1.7 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. 1.8 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. ====== Significance And Use ====== 5.1 Test Method D1907/D1907M is considered satisfactory for acceptance testing of commercial shipments, since it has been used extensively in the trade for that purpose. 5.1.1 In case of dispute arising from differences in reported test results when using Test Method D1907/D1907M 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. 5.1.2 Competent statistical assistance is recommended for the determination of such a bias. As a minimum, the two parties should take a group of test specimens that are as homogeneous as possible, and that are from the same lot of the material 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 statistical analysis for unpaired data, and an acceptable probability level chosen by the parties before testing begins. If a bias is found, either its cause must be identified and corrected, or the purchaser and supplier must agree to interpret future test results for that material with consideration to the known bias. 5.2 This test method is intended primarily for the determination of the average linear density of yarns. However, the variations identified by the results may also provide useful information. If the coefficient of variation is to be calculated, each skein must be weighed separately, and a larger number of skeins will need to be tested (as compared to the number of skeins to be tested for the determination of the average yarn linear density alone). 5.3 This test method includes seven options, depending on whether the yarn is scoured before weighing, weighed in the conditioned or oven-dried state, or whether or not the results obtained are adjusted for commercial moisture regain, or a commercial allowance. Option 1 (unscoured, conditioned yarn) is generally used for yarns spun on the cotton system, while Options 6 and 7 (scoured, oven dried yarn, plus commercial moisture regain, or allowance) are generally used for filament yarns, or yarns containing wool fibers. The specific options to be used in any instance shall be agreed upon by the parties, or as prescribed in test methods or tolerances. 5.4 In Options 2, 3, 5, 6, and 7, an oven-dried sample is obtained by exposing the yarn in an oven with a supply of air at standard textile testing conditions, as described in 6.3 .