| Amount of PEG 4000 (10−4 g/cm2) | Amount of TiO2 (10−4 g/cm2) | ||
| 4.32 | 6.53 | 8.71 | |
| 0.00 | RA | RB | RC |
| 1.92 | A1 | B1 | C1 |
| 2.56 | A2 | B2 | C2 |
| 3.20 | A3 | B3 | C3 |
| 3.84 | A4 | B4 | C4 |