8 / | HD | BLEACHING AND DYEING; FLUID TREATMENT AND CHEMICAL MODIFICATION OF TEXTILES AND FIBERS |
506 | DF | NONTEXTILE, DYEING PROCESS OR PRODUCT, INCLUDING INORGANIC FIBER {12} |
510 | DF | .~ Acrylonitrile polymer substrate {1} |
511 | .~.~ Contains basic addition comonomer, e.g., vinyl pyridine, etc. |