| 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} |
| 516 | | .~ Amide polymer substrate {1} |
| 517 | DF | .~.~> Natural polyamide, e.g., casein, gelatin, keratin, collagen, etc. |