| 0.075 M CuSO4∙5H2O | Organoclay added (%) | designated name |
| 100 | 1 | CloCu-1 (A) |
| 100 | 2 | CloCu-2 (B) |
| 100 | 3 | CloCu-3 (C) |
| 100 | 4 | CloCu-4 (D) |
| 100 | 5 | CloCu-5 (E) |