1.1 本试验方法涵盖了使用显微投影仪计算羊毛和其他动物纤维部分断裂的程序。 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 试验方法 D4510 对于部分卵裂的计数，可用于羊毛和其他动物纤维商业装运的验收测试，但建议谨慎，因为有关实验室间精度的信息有限。按照中的指示进行比较测试 5.1.1 可能是可取的。 5.1.1 如果使用本测试方法进行商业装运验收测试时，由于报告测试结果的差异而产生争议，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，双方应尽可能均匀地从大量相关类型的材料中选取一组试样。 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学生t检验和双方在测试开始前选择的可接受概率水平进行比较。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。 图1 （A） 部分断裂，但如果位于纤维末端，则不计算在内。分裂可能是由其他方式引起的 5.2 合格操作员可在显微镜下识别化学损伤或压痛的纤维，不应将其视为部分断裂。这些纤维表现出角质层完全丧失、严重的表面侵蚀、软化裂纹、纵向纤维性颤动或这些特征的组合（参见 无花果。1和 2. ). 在一个实验室对故意过度碳化的羊毛进行的一项研究中，发现当在1米内观察到超过24条嫩化纤维时，部分裂解计数明显高于未过度碳化的类似纤维。 图1 （B–D）分裂光纤 （续） 图2 带有横向裂纹的纤维

1.1 This test method covers a procedure, using the microprojector, for the counting of partial cleavages in wool and other animal fibers. 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 Test Method D4510 for the counting of partial cleavages, may be used for the acceptance testing of commercial shipments of wool and other animal fibers, but caution is advised, since information on between-laboratory precision is limited. Comparative tests as directed in 5.1.1 may be advisable. 5.1.1 In case of a dispute arising from differences in reported test results when 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 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 homogeneous as possible and that 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 Students t-test for unpaired data and an acceptable probability level chosen by the two parties before the 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 the known bias. FIG. 1 (A) Partial Cleavage—But do not count if it is at the end of a fiber. The split may have been caused by other means 5.2 Chemically damaged or tendered fibers are recognizable microscopically by qualified operators and should not be counted as partial cleavages. Such fibers exhibit total loss of cuticle, severe surface erosion, tenderizing cracks, longitudinal fibrillation, or a combination of these features (see Figs. 1 and 2 ). In a study of deliberately over-carbonized wool at one laboratory, it was found that when more than 24 tendered fibers were seen in 1 m, partial cleavage counts were significantly higher than on similar fibers that were not overcarbonized. FIG. 1 (B–D) Split Fiber (continued) FIG. 2 Fiber With Transverse Cracks