twist testers

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Scope note
Devices used to measure the exact level of twist, or the spiral arrangement of fibers around the axis of yarn, inside a spun yarn sample. To calculate this measurement, these devices work to remove the twist by mechanically rotating a yarn sample held between two moveable clamps with a defined tension rate. The number of rotations needed to untwist the yarn's fibers are then calculated. The higher the twist measurement, the stronger the yarn is determined to be.
twist testers
Accepted term: 06-May-2024