| Exposure days |
Initial weight (g) |
Final weight (g) |
| 4 |
1.2 |
1.2 |
| 9 |
1.1 |
1.1 |
| 14 |
1.4 |
1.2 |
| 19 |
1.5 |
1.4 |
| 24 |
1.5 |
1.3 |
| 29 |
1.3 |
1.2 |
| 35 |
1.3 |
1.1 |