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What is viscose fiber?

It is basically cellulose. One trade name was/is Rayon. It is made by taking wood pulp and mercerising in caustic soda. This is called alkcell. This is then reacted with carbon disulfide to make sodium cellulose xanthate. This is then mixed with more caustic soda solution and then matured. This viscose is then forced through a spinneret and spun in an acid bath. The caustic reacts with the acid leaving cellulose fiber. The raw fiber is then washed and treated.
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