A manufactured fiber composed of regenerated cellulose, as well as manufactured fibers composed of regenerated cellulose in which substituents have replace not more than 15% of the hydrogens of the hydroxyl group.

The cellulose base for the manufacture of rayon is obtained from wood pulp or cotton linters, which are the short brown fibers left on the cotton seed after the first-time ginning on the plantation or at the community gin. Wood pulp for rayon comes from spruce, pine, or hemlock chips.

Rayon, at present, includes yarn made from the cuprammonium, nitro—cellulose, and viscose methods.

Rayon fibers, like cotton, leave an ash when burned.

Acetate, a cellulosic derivative, has its filaments formed by a compound of cellulose and acetic acid which has coagulated. ,Cuprammonium filaments are made of regenerated cellulose in ammoniacal copper oxide. viscose filaments are made of regenerated cellulose coagulated from a solution of cellulose xanthate.