distinguish between reeled silk and spun silk ?
Answers
Answer:
Reeling cocoons is essentially a matter of softening the sericin enough to locate the end of the filament, combining this filament with those of other cocoons, and winding off the resulting thread. As long as it has the sericin in it, it's called by various names - grege silk, gummed silk, or raw silk. It's rather stiff and springy, slightly creamy colored from the sericin, and reminds me of very fine fishing line, or hair.
Because reeled silk is composed of VERY long filaments, it doesn't need to be twisted to hold it together. It's the presence of continuous filaments that determine whether it's reeled, NOT the presence of twist.
Spun silk is the Waste from the reeling process, cocoons that weren't reelable, or cocoons from which the moth emerged are used for spun silk. It's degummed and then combed out into parallel fibers. To make it more manageable, the fibers are cut into shorter lengths and drawn out into a rope of parallel, overlapping fibers. From this point, it either continues on to be spun into thread by machine, or it's sold to handspinners.
Because spun silk is composed of short lengths of fiber (like wool or cotton), it must have twist to hold it together. The amount of twist, or number of plies is variable, and determines how hard or soft the thread feels.
The spun and reeled silk is made by differed process.
Explanation:
- The reeled silk is a processes by which the number of cocoons are reeled together to produce a single thread. This needs a sitting type of reeling machine. It has to maintained at a temperature of 65-80°C.
- The spun silk is made form the shorter lengths that are obtained from the damaged cocoons and can also made from those that are broken off during the processing.
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