Viscose fiber is one of the oldest fiber varieties. Among the twelve major textile fibers, viscose fiber, with the features of being smooth, cool, breathable, antistatic, and magnificent-after-dyeing, best meets the physiological requirements of human skin in the rate of moisture. It is good in hygroscopicity, comfortable to wear, excellent in spinnability, and hence is often blended or interwove with cotton, wool, or vairous kinds of synthetic fiber, widely used for all types of clothing and decorative textiles.