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Holdsworth's Cyclopaedia & Glossary: Events, People, Terms

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Z-Twist denotes the direction of twist, to the right looking up, in a single thread or folded yarn.
Opposite of S-Twist.
The amount of twist is measured in turns per unit length of the yarn. e.g. turns per inch; turns per 100cm.

Zacki is the term used to describe the notch which forms the pile height in a Reed. The sculptured notch separates the weft threads in face-to-face weaving.
The dimensions of the notch determine the height of the Pile in the fabric to be woven.

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