1.1 本试验方法用于使用测量工具在固定距离内测定机织物和针织物的弯曲和歪斜。 1.2 当需要评估小样本或切割零件的弯曲和歪斜时，如果有翘曲或填充，或两者都有，参考线可用，该测试方法很有用，以帮助对齐工具。 1.3 试验方法 D3882 可用于测量成卷织物的弯曲和歪斜。然而，使用 D3882 可能无法与通过本试验方法获得的结果进行比较。 1.4 没有已知的ISO等效标准。 1.5 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。 1.6 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。 1.7 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 本试验方法提供了一个标准程序，用于获取用于研究和开发、质量控制、规范下的验收和拒收以及特殊用途的数据。 5.2 通过本试验方法获得的数据适用于本特定试验条件下的材料，且不一定与在其他使用环境下获得的数据相同。 5.3 本试验方法被视为满足商业装运验收试验的要求。 5.4 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，并使用适当的统计协助。 作为最低要求，使用的测试样品应尽可能均匀，从获得不同测试结果的材料中提取，并以相同数量随机分配给每个实验室进行测试。具有既定测试值的其他织物可用于此目的。应使用未配对数据的统计测试，在测试系列之前选择的概率水平上，比较两个实验室的测试结果。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，调整未来的测试结果。 5.5 在织物制造、染色、拉幅、整理或其他操作过程中，可能会产生弯曲或歪斜，其中存在张力在织物宽度上不均匀分布的可能性。弓形和斜纹在彩色图案织物（如格子布和水平条纹）中比在纯色中更令人不愉快，因为对比使变形更加突出。这些缺陷可能导致此类织物的缝纫问题和成品的悬垂问题。弓形线中的波浪状或尖锐断裂对缝合组件的小样本的外观更为不利。

1.1 This test method is used to determine the bow and skew of woven and knitted fabrics over a fixed distance, using a measuring tool. 1.2 This test method is useful when a small specimen or cut parts need to be evaluated for bow and skew, provided a warp or fill, or both, reference line is available, to aid in aligning the tool. 1.3 Test Method D3882 may be used when measuring bow and skew in fabric in rolls. However, results obtained with D3882 may not be comparable with results obtained by this test method. 1.4 There is no known ISO equivalent standard. 1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.6 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. 1.7 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 provides a standard procedure for obtaining data for research and development, quality control, acceptance and rejection under specifications, and for special purposes. 5.2 The data obtained by this test method is applicable to the material under the conditions of this particular test and is not necessarily the same as obtained under other environments in use. 5.3 This test method is considered satisfactory for acceptance testing of commercial shipments. 5.4 If there are differences of practical significance between reported test results for two laboratories (or more), comparative tests should be performed to determine if there is a statistical bias between them, using competent statistical assistance. As a minimum, the test samples to be used are as homogeneous as possible, are drawn from the material from which the disparate test results were obtained, and are randomly assigned in equal numbers to each laboratory for testing. Other fabrics with established test values may be used for this purpose. The test results from the two laboratories should be compared using a statistical test for unpaired data, at 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 must be adjusted in consideration of the known bias. 5.5 Bow or skew can be induced during fabric manufacturing, dyeing, tentering, finishing, or other operations where a potential exists for uneven distribution of tensions across the fabric width. Bow and skew are more visually displeasing in colored, patterned fabrics such as plaids and horizontal stripes rather than in solid colors because the contrast makes the distortion more prominent. These defects may cause sewing problems in such fabrics and draping problems in finished products. Wavy or sharp breaks in the bow line are more detrimental to the appearance of small specimens of a sewn assembly.