1.1 本试验方法涵盖了测定原毛样品中羊毛基含量和干净羊毛纤维的实验室程序。本试验方法也适用于其他动物纤维，如马海毛、羊绒、羊驼和骆驼毛。 注1: 实践中涵盖了包装中大量原毛的取样 D1060 ; 试验方法中包括了测定水洗羊毛中的植物物质和其他碱不溶性杂质 D1113 ; 试验方法涵盖了商业规模的羊毛含量测定 D1334 . 关于将各种商业指定成分（以前包含在本试验方法附录中）的粗磨羊毛、上衣或落棉的毛基含量转换为其当量的因素，请参阅规程 D2720 . 注2: 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 以国际单位制表示的数值应视为标准值。本标准不包括其他计量单位。 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 由于该测试方法已在验收测试行业中广泛使用，因此该测试方法被认为适用于商业装运的验收测试。 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 D584 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。建议为调查偏差提供称职的统计协助。 作为最低要求，双方应尽可能从大量相关类型材料中选取一组同质试样。然后，应将试样以相同数量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学生的 t -测试未配对数据和双方在测试开始前选择的可接受概率水平。如果发现偏差，必须找到并纠正其原因，或者买方和供应商必须同意根据已知偏差解释未来的测试结果。 5.2 任何条件或形式的羊毛的毛基含量都是一个基本量。从中可以计算出国际商业中使用的各种公认定义系统中的商业质量或收益率( 注1 ). 5.2.1 本试验方法和IWTO方法中提供的测定含脂羊毛毛基含量的程序 19-85（E）基本一致。 注3: 与IWTO方法不同的是，这不适用于冲刷羊毛 19-85（E）不要求对含有少于5 % 残留润滑脂。 5.3 许多原毛中存在的毛基并非都能通过商业清洗操作以有用的形式回收。羊毛损失量因羊毛特性、存在杂质的性质和百分比、清洁过程和使用的设备等因素而异。 5.4 ASTM标准没有规定或建议任何特定的程序或实践来估计商业清洗（或其他）操作期间的预期损失。以下法定惯例仅供参考: 5.4.1 为了对进口到美国的原毛进行关税评估，美国的关税表 5. 提供了一个法定公式，用于计算“在商业清洁操作中通常会损失的”羊毛的余量该公式基于存在的清洁羊毛纤维（在关税表中称为“绝对清洁含量”）和存在的植物物质。就存在的干净羊毛纤维而言，余量等于0.5 % 现有的干净羊毛纤维加60 % 在现有的蔬菜中，总允许量不得超过15 % 清洁的羊毛纤维。 应课税数量（在关税表中称为“清洁产量”）是存在的清洁羊毛纤维与如此计算的免税额之间的差额。

1.1 This test method covers a laboratory procedure for the determination of the wool base content and the clean wool fiber present in samples of raw wool. This test method is also applicable to other animal fibers such as mohair, cashmere, alpaca, and camel hair. Note 1: Sampling of lots of raw wool in packages is covered in Practice D1060 ; the determination of vegetable matter and other alkali-insoluble impurities in scoured wool is covered in Test Method D1113 ; the determination of wool content on a commercial scale is covered in Test Method D1334 . For factors for the conversion of woolbase content to its equivalent in terms of scoured wool, top, or noil of various commercially specified compositions (formerly covered in the appendix of this test method), refer to Practice D2720 . Note 2: Because of the trade practice the term weight is used in this test method instead of the technically correct term mass. 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. 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 acceptance testing of commercial shipments since this test method has been used extensively in the trade for acceptance testing. 5.1.1 In case of dispute arising from differences in reported test results when using Test Method D584 for acceptance testing of commercial shipments, the purchaser and the supplier should conduct comparative testing to determine if there is a statistical bias between their laboratories. Competent statistical assistance is recommended for the investigation of bias. As a minimum, the two parties should take a group of test specimens that are as homogenous as possible and that are from a lot of the type material in question. The test specimens should then be assigned in equal numbers to each laboratory for testing. The average results from the two laboratories should be compared using Student's t -test for unpaired data and an acceptable probability level chosen by the two parties before testing is begun. If a bias is found, either its cause must be found and corrected or the purchaser and the supplier must agree to interpret future test results in the light of known bias. 5.2 The wool-base content of wool in any condition or form is a basic quantity. From it may be calculated commercial masses or yields in any of the various recognized defined systems used in international commerce ( Note 1 ). 5.2.1 The procedures for determining the wool base content of greasy wool provided in this test method and in IWTO Method 19-85(E) are in essential agreement. Note 3: This is not true for scoured wool, as IWTO Method 19-85(E) does not require rescouring of scoured wool containing less than 5 % residual grease. 5.3 Not all of the wool base present in a lot of raw wool can be recovered in useful form by commercial cleaning operations. The amount of wool loss varies, depending on factors such as the character of the wool, the nature and percentage of the impurities present, the cleaning process and equipment used, and so forth. 5.4 No ASTM standard specifies or recommends any specific procedure or practice for estimating anticipated loss of wool during commercial cleaning (or other) operations. The following statutory practice is described solely for information: 5.4.1 For the purpose of duty assessment on importations of raw wool into the United States, the Tariff Schedules of the United States 5 provides a statutory formula for calculating the allowance to be made for wool “that would ordinarily be lost during commercial cleaning operations.” The formula is based on the clean wool fiber present (called “absolute clean content” in the Tariff Schedules) and on the vegetable matter present. The allowance, in terms of clean wool fiber present, is equal to 0.5 % of the clean wool fiber present plus 60 % of the vegetable matter present, the total allowance not to exceed 15 % of the clean wool fiber present. The dutiable quantity (called “clean yield” in the Tariff Schedules) is the difference between the clean wool fiber present and the allowance so calculated.