| Time of immersion (hours) | B | logk | k × 10−2 (hr−1) |
| 3 | −0.4580 | −1.9198 | 1.2028 |
| 6 | −0.1524 | −1.7423 | 1.8101 |
| 9 | −0.3244 | −1.7881 | 1.6289 |
| 12 | −0.2244 | −1.6912 | 2.0361 |
| 15 | −0.2231 | −1.6269 | 2.3610 |
| 18 | −0.2024 | −1.5896 | 2.5728 |