Official Journal of the Japan Wood Research Society
Table 3 Compressed layer(s) position, compression percent, surface hardness
Wood | Position of compressed layer(s) | Compression (mm) | Compression rate (%) | Surface hardness (N/mm2) | Surface hardness increasing percentage (%) |
|---|---|---|---|---|---|
Sugi heartwood | Control | 0 | - | 4.34 (0.71) | – |
Surface | 6 | 23.1 | 10.49 (0.61) | 141.53 | |
Interior | 8.60 (1.18) | 98.84 | |||
Center | 6.40 (0.99) | 47.65 | |||
Surface | 10 | 33.3 | 12.15 (1.34) | 181.37 | |
Interior | 8.85 (1.27) | 104.60 | |||
Center | 7.02 (1.26) | 62.08 | |||
Sugi sapwood | Control | 0 | 8.24 (1.19) | – | |
Surface | 6 | 20.0 | 13.51 (1.61) | 64.55 | |
Interior | 9.60 (1.03) | 16.64 | |||
Center | 8.83 (0.84) | 7.25 | |||
Surface | 10 | 33.3 | 27.92 (2.67) | 240.75 | |
Interior | 13.19 (1.97) | 60.60 | |||
Center | 8.61 (0.81) | 4.55 | |||
Hinoki | Control | 0 | 11.75 (1.85) | – | |
Surface | 5 | 20.0 | 23.04 (2.70) | 100.27 | |
Interior | 14.39 (2.29) | 23.52 | |||
Center | 12.17 (1.06) | 3.91 |