| Selected coupling agent | KH-550 | KH-171 | KH-602 |
| Stability | Good | Good | Good |
| Softness (mm) | 29.3 | 30.6 | 28.9 |
| Smoothness | 4 - 5 | 4 - 5 | 4 - 5 |
| Hydrophilicity | 11.39 | 12.47 | 12.52 |
| Whiteness | 74.9 | 75.2 | 73.6 |