chloe. yarn. March 14th , 2018.
When natural hair-type fibers are burned they tend to singe and have a smell of burnt hair; this is because many as human hair are protein-derived. Cotton and viscose (rayon) yarns burn as a wick. Synthetic yarns generally tend to melt though some synthetics are inherently flame-retardant. Noting how an unidentified fiber strand burns and smells can assist in determining if it is natural or synthetic and what the fiber content is.
In general natural fibers tend to require more careful handling than synthetics because they can shrink felt stain shed fade stretch wrinkle or be eaten by moths more readily unless special treatments such as mercerization or superwashing are performed to strengthen fix color or otherwise enhance the fiber own properties.
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.
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