| Weight of extracts used | 7.5g | 15g | 20g | 25g |
| pH readings of extracts | ||||
| Methanol dye extracts | 6.72 | 6.68 | 6.66 | 6.6 |
| Ethanol dye extracts | 6.52 | 6.45 | 6.42 | 6.41 |
| Acetone dye extracts | 6.36 | 6.33 | 6.3 | 6.28 |