| 430 / | HD | RADIATION IMAGERY CHEMISTRY: PROCESS, COMPOSITION, OR PRODUCT THEREOF | 
| 31 | DF | ELECTRIC OR MAGNETIC IMAGERY, E.G., XEROGRAPHY, ELECTROGRAPHY, MAGNETOGRAPHY, ETC., PROCESS, COMPOSITION, OR PRODUCT {18} | 
| 32 | DF | .~ Electrophoretic imaging, process, composition, or product {6} | 
| 33 |  | .~.~ Post treatment process to fix or transfer image, or collect or remove electric radiation sensitive pigment |