Fibers are made and supplied in silk but from other materials, because this type of fiber goes into the work of textile tissue such as cloth, and the fabric derived from it, but should not be used in the fabric of the fashion, because it does not last and does not have the durability and reliability and other characteristics necessary, and damages the reputation of this handmade. Rion cellulose fibers are similar to silk because they are stranded and are usually called artificial silk in factories.