| PEG (ml) | Decolorization rate (%) | |||||
| 3 min | 6 min | 9 min | 12 min | 15 min | 18 min | |
| 0 | 69.0 | 77.4 | 84.8 | 88.5 | 90.7 | 96.9 |
| 0.15 | 75.7 | 92.7 | 97.9 | 98.2 | 99.9 | 99.9 |