1.1 本试验方法包括通过对大量原毛进行商业规模的精练，然后对精练后的羊毛样品进行实验室试验，来测定原毛中的毛基含量和干净羊毛纤维。 注1: 实践中涵盖了包装中大量原毛的取样 D1060 试验方法中包括了此类样品中羊毛含量的测定 D584 . 试验方法中包括了测定水洗羊毛中的植物物质和其他碱不溶性杂质 D1113 . 有关将各种商业指定成分的洗过的羊毛、上衣或落棉中的毛基含量转换为其当量的因素，请参阅规程 D2720 . 注2: 由于常见的商业惯例，以美国惯用单位表示的数值将被视为标准。括号中的S.I.单位仅供参考。 注3: 由于贸易惯例，本试验方法中使用了术语“重量”，而不是技术上正确的术语“质量”。 1.2 以英寸-磅为单位的数值应视为标准值。括号中给出的值是到国际单位制的数学转换，仅供参考，不被视为标准值。 1.3 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。 1.4 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 本试验方法被认为是测定大量原毛中的毛基含量和干净羊毛纤维的一种参考方法。如果两个实验室（或更多实验室）的报告测试结果之间存在实际意义上的差异，则应进行比较测试，以确定它们之间是否存在统计偏差，并使用主管的统计协助。作为最低要求，使用尽可能同质的样品进行比较试验，从与初始试验期间产生不同结果的样品相同批次的材料中提取，并随机等份分配给每个实验室。应使用未配对数据的统计测试对相关实验室的测试结果进行比较，在测试系列之前选择概率水平。 如果发现偏差，必须找到并纠正其原因，或者考虑到已知偏差调整该材料的未来结果。 5.2 该试验方法也用于旨在推导适当公式的研究，以估算在梳理、精梳或炭化等商业操作中不可避免地损失或破坏的羊毛的余量。

1.1 This test method covers the determination of the wool base content and the clean wool fiber present in a lot of raw wool by commercial-scale scouring of the lot followed by laboratory tests on samples of the scoured wool. Note 1: The sampling of lots of raw wool in packages is covered in Practice D1060 , and the determination of the wool content of such samples is covered in Test Method D584 . The determination of vegetable matter and other alkali-insoluble impurities in scoured wool is covered in Test Method D1113 . For factors for the conversion of wool base content to its equivalent in terms of scoured wool, top, or noil of various commercially specified compositions, refer to Practice D2720 . Note 2: The values stated in U.S. Customary Units are to be regarded as the standard because of common commercial practice. The S.I. units in parentheses are provided for information only. Note 3: Because of trade practice the term “weight” is used in this test method instead of the technically correct term “mass”. 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. ====== Significance And Use ====== 5.1 This test method is considered satisfactory for use as a referee method for the determination of the wool base content and the clean wool fiber present in a lot of raw wool. 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 test that are as homogenous as possible, drawn from the same lot of material as the samples that resulted in the disparate results during the 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, probability level chosen prior to the testing series. If bias is found, either its cause must be found and corrected, or future results for that material be adjusted in consideration of the known bias. 5.2 This test method is also used in studies aimed at deriving suitable formulas for estimating the allowances to be made for wool unavoidably lost or destroyed in such commercial operations as carding, combing, or carbonizing.