The use of this natural fiber dates back to the third millennium B.C.E. in China and is derived from the dried saliva of the silkworm during the cocooning process. Sericulture, or the process of cultivating and ultimately weaving silk cloth, was for many centuries a coveted secret. Throughout history, silk was used as a form of currency with traders exchanging silk fabric for other goods. The famous Silk Road eventually led to silk production moving to other countries such as India, Korea, Japan, France, and Italy. Silk's long staple, brilliant luster, and extremely complex processing make it one of the most expensive luxury fibers in the world and maintains a high-status appeal.
Historical Dictionary of the Fashion Industry. Francesca Sterlacci and Joanne Arbuckle.