
| ITEM | quality | ||
| Special class | First class | Eligible | |
| ZnO % >= | 99.70 | 99.50 | 99.40 | 
| Water | 0.1 | 0.1 | 0.15 | 
| Zn | - | - | 0.08 | 
| Pb Oxide | 0.037 | 0.05 | 0.14 | 
| Mu Oxide | 0.0001 | 0.0001 | 0.0003 | 
| Cu Oxide | 0.0002 | 0.0004 | 0.0007 | 
| Hydrochloric acid insoluble | 0.006 | 0.008 | 0.05 | 
| Burnning lost | 0.2 | 0.2 | 0.2 | 
| The rest of select | 0.1 | 0.15 | 0.2 | 
| Volatile | 0.3 | 0.4 | 0.5 |