Silk
Silk is a natural protein fiber that some kind of can be woven into textiles. The most recognizable type of silk is the silk obtained from the cocoon produced by the larvae of the lobster. The glittering look which is the source of silk attraction comes from the structure of a triangular prism in fibers that allows silk fabrics to spoil the light that passes through it at various angles. "Wild Silk" is produced by caterpillars other than silk and silk caterpillars and can not be reared. A variety of wild silk is known and used in China, South Asia, and Europe since the past, but its production is always much smaller than silk. The wild silks vary from the silk in terms of color and texture, and the collected cocoons are often damaged by the butterfly that comes out before being stacked, so the silk thread that formed the cocoon has been cut short. Livestock silkworm reports are also killed by dipped into boiling water before the adult moth out, or pierced with a needle, allowing the whole cocoon to become an uninterrupted thread.