The spirality of wale lines is shown to affect shape factor and hence fabric dimensions. Spirality is determined by yarn twist liveliness, tightness factor, and machine gauge, whereas yarn twist liveliness is governed by actual yarn twist. Full relaxation may decrease or increase spirality depending on whether the tightness factor of the parent fabric is greater or less than 14.0. To minimize spirality in the finished fabric, the cloth should be knitted on a machine with the finest possible gauge at a tightness factor value ≥ 14.0.
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