8 / | HD | BLEACHING AND DYEING; FLUID TREATMENT AND CHEMICAL MODIFICATION OF TEXTILES AND FIBERS |
115.51 | DF | CHEMICAL MODIFICATION OF TEXTILES OR FIBERS OR PRODUCTS THEREOF {7} |
116.1 | DF | .~ Cellulose fibers {8} |
120 | DF | .~.~ Esterifying, etherifying or immunizing {2} |
121 | .~.~.~ Acetylation |