Woolen count (YSW):
The number of hanks ( skeins) having length of 256 yards in one pound of yarn is called woolen count (YSW). As system name indicates, it is used to express the count of woolen yarn. The fineness of yarn increases when yarn count increases in this system. The yarn count in this system is calculated as follows:
Suppose that the length of yarn is L meters, and weight of yarn is W grams.
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