Viscose fiber industry use pulp as raw materials. Pulp that is used for viscose fiber is different with the pulp that is used for paper industry, even the raw material to produce pulp are the same, but the chemicals to process wood become pulp is different for each pulp kind.. Pulp for paper using sodium hydroxide to cook woods whether the chemicals to cook pulp for viscose use magnesium bisulphate. Sodium hydroxide more harder effect that magnesium bisulphate, so the pulp for paper result will more softer than pulp for viscose.
To process pulp become viscose fiber first, the pulp is converted to alkali cellulose then react with