yarn. Friday , March 16th , 2018 - 01:41:50 AM
Another measurement of yarn weight often used by weavers is wraps per inch (WPI). The yarn is wrapped snugly around a ruler and the number of wraps that fit in an inch are counted.
Other animal fibers used include alpaca angora mohair llama cashmere and silk. More rarely yarn may be spun from camel yak possum musk ox cat dog wolf rabbit or buffalo hair and even turkey or ostrich feathers. Natural fibers such as these have the advantage of being slightly elastic and very breathable while trapping a great deal of air making for a fairly warm fabric.
In Europe textile engineers often use the unit tex which is the weight in grams of a kilometre of yarn or decitex which is a finer measurement corresponding to the weight in grams of 0 km of yarn. Many other units have been used over time by different industries.
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