Cuprammonium rayon, which is the variety that most closely resembles silk, was invented in 1890. The fiber is made through a process that involves dissolving the cellulose from wood pulp or cotton linters in a solution of copper oxide and ammonia, and then forcing the substance through a spinneret so that it is extruded in filaments that undergo stretch spinning. The result is a lustrous, very fine yarn that can be utilized to create sheer, lightweight fabrics with superior draping qualities, as well as hosiery. This variety of rayon is often more familiarly known by the trade name Bemberg.