rayon is a manufactured regenerated cellulose fiber. because it is produced from naturally occurring polymers,it is neither a truly synthetic fiber nor a natural fiber,it is a semi-synthetic or artificial fiber. rayon is known by the names viscose rayon and art silk in the textile industry. it usually has a high luster quality giving it a bright sheen. (wikipedia)
in the experiment, cellulose in filter is dissolved and, upon acidification, precipitated and regenertad as rayon.