Amayoriito - loosely twisted thread

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[Twisted Yarn]
The act of twisting yarn and the resultant twisted yarn are called twisted yarn. There are strong twist yarn, medium twist yarn, and weak twist yarn, and weak twist yarn is also called loose twist yarn. However, when twisting is done with a roving frame or a fine spinning frame, it is not called twisted yarn, but rather it is called added twist. …

*Some of the terminology that refers to "loosely twisted yarn" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

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【撚糸】
　糸に撚りをかけること，および撚られた糸のことを撚糸という。撚糸には強撚糸，中撚糸，弱撚糸などがあり，弱撚糸は甘撚り糸ともいう。しかし粗紡機や精紡機で撚りをかけるときは撚糸とはいわず，加撚という。…

※「甘撚り糸」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報