Explanatory notes
… to produce polymers such as cuprammonium rayon (cupro) or viscose rayon, or by chemical modification of natural … fibres are : (A) Cellulosic fibres , namely : (1) Viscose rayon , which is produced by treating cellulose … is in turn transformed into a thick solution known as viscose by dissolving it in dilute sodium hydroxide. …Legal note
… to produce polymers such as cuprammonium rayon (cupro) or viscose rayon, or by chemical modification of natural …