n. The trade-name of a plastic material made from cellulose (cotton fiber) by treatment with a solution of caustic soda, addition of carbon disulphid, and digestion at ordinary temperature until a homogeneous liquid is produced, a solution of cellulose thiocarbonate, from which a structureless jelly-like coagulum of cellulose is formed by spontaneous decomposition. Cellulose tetra-acetate may also be used to obtain viscose. Mineral pigments, hydrocarbons, and other substances may be incorporated with viscose before it is molded into special shapes for use. A fiber imitating silk in luster has also been prepared from this material.