| Parameters | Bark characteristics according to girth class | ||||
| A | B | C | D | E | |
| Colour | Greyish green | Brownish black | Brownish black | Brownish black | Brownish black |
| Texture | Smooth | Rough | Rough | Rough | Rough |
| pH | 5.5 | 6.4 | 6.4 | 6.7 | 6.7 |
| Moisture content (%) | 105 | 114 | 178 | 139 | 235 |