ASTM D7811 is used to determine the bow and skew of woven and knitted fabrics over a fixed distance using a measuring to ol. The method is satisfactory for acceptance testing of commercial samples. The SI units should be considered as standard.... Read More
Average 30% Cost Savings
100% Confidentiality Guarantee
Free, No-obligation Consultation
100% Customer Satisfaction
TRUSTED BY ENGINEERS FROM
ASTM D7811 Bow and Skew Using a Measuring Tool
ASTM D7811 is used to determine the bow and skew of woven and knitted fabrics over a fixed distance using a measuring tool. The method is satisfactory for acceptance testing of commercial samples. The SI units should be considered as standard.
ASTM D7811 is useful when a small specimen or cut parts need to be evaluated for bow and skew, provided a wrap or fill, or both reference lines are available, to aid in aligning the tool. This test method is used for measuring bow and skew in fabrics in rolls.
InASTM D7811 test method, a straightedge is placed across the fabric between two points at which a marked filming yarn, knitted course, or designated design meets the two edges. The greatest distance between the straightedge and designated design is measured parallel to the selvage.
Video 01: Standard test method to measure bow and skew
According to ASTM D7811, the specimens should be conditioned at 400 mm in length.
Bowing (%) = D/W × 100 Where; D= maximum bow in fabric W= fabric width (inches) Skewing (%) = D/W × 100 Where, D = difference between actual and perpendicular path W= fabric width (inches)
ASTM D7811 is useful when a small specimen or cut parts need to be evaluated for bow and skew, provided a wrap or fill, or both reference lines are available, to aid in aligning the tool.
ASTM E572 test method covers the analysis of stainless and alloy steels by Wavelength Dispersive X-ray Fluorescence Spectrometry (WDXRF). It provides rapid, multi-element determinations with sufficient accuracy to assure product quality.
The ASTM D2674 test is a standard test method for the analysis of sulfochromate etch solutions used in the surface preparation of aluminum. The ASTM D2674 standard specifies a method for determining the efficacy of an etchant used to prepare the surface of aluminum alloys for subsequent adhesive bonding.
An immunological method for quantization of Hevea Natural Rubber (HNRL) proteins using rabbit anti-HNRL serum. Rabbits immunized with HNRL proteins react to the majority of the proteins present, and their sera have the capability to detect most if not all the proteins in HNRL.
ASTM G65 measures the resistance of metallic materials to abrasion using the dry sand/rubber wheel apparatus. The quality, durability, and toughness of the sample are determined using this test. Metallic materials are ranked in their resistance to scratching abrasion under a controlled environment.
ASTM E2141 test methods provide accelerated aging and monitoring of the performance of time-dependent electrochromic devices (ECD) integrated in insulating glass units (IGU). This test helps to understand the relative serviceability of electrochromic glazings applied on ECD.
ASTM C724 test method is used in analyzing the quality and ease of maintenance of a ceramic decoration on architectural-type glass. This test method is useful in the acknowledgment of technical standards.
Send us a request
Process for testing
You share material and testing requirements with us
You ship your sample to us or arrange for us to pick it up.
We deliver the test report to your email.
Just share your testing requirements and leave the rest on us!
Free, no-obligation consultation
Quick turnaround time
Let us combine our capabilities to achieve success!!