| 501 / | HD | COMPOSITIONS: CERAMIC |
| 1 | DF | CERAMIC COMPOSITIONS {15} |
| 141 | DF | .~ Clay containing (e.g., porcelain, earthenware, etc.) {3} |
| 145 | DF | .~.~ Clay pretreatment {3} |
| 146 | DF | .~.~.~ Chemical pretreatment {2} |
| 148 | ![]() | .~.~.~.~ Using organic substance as treating agent |