Official Journal of the Japan Wood Research Society
Table 2 Chemical composition of SPF raw material and pulp
Components | α-Cellulose (%) | Pentosan (%) | Extractives (%) | Ash (%) |
|---|---|---|---|---|
Raw material | 36.7 ± 1.4 | 24.8 ± 1.2 | 7.4 ± 0.1 | 6.3 ± 0.01 |
Pulp before the TCF bleaching* | 78.5 ± 1.1 | 3.5 ± 0.7 | 3.1 ± 0.1 | 3.1 ± 0.02 |
Pulp after the TCF bleaching* | 94.3 ± 0.9 | 0.6 ± 0.1 | 0.6 ± 0.1 | 0.13 ± 0.01 |