ASTM D7811-13(2017)

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.