Official Journal of the Japan Wood Research Society
Table 4 Comparison of the effects of the thermal modification temperature using Duncan’s test on the a* value change
From: Impact of thermal modification on color and chemical changes of spruce and oak wood
Temperature (°C) | (1) 4.26 | (2) 6.75 | (3) 10.37 | (4) 9.64 | (5) 6.73 | (6) 7.39 | (7) 7.69 | (8) 4.08 | ||
|---|---|---|---|---|---|---|---|---|---|---|
1 | Spruce | 20 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.429 | |
2 | 160 | 0.000 | 0.000 | 0.000 | 0.943 | 0.014 | 0.000 | 0.000 | ||
3 | 180 | 0.000 | 0.000 | 0.002 | 0.000 | 0.000 | 0.000 | 0.000 | ||
4 | 210 | 0.000 | 0.000 | 0.002 | 0.000 | 0.000 | 0.000 | 0.000 | ||
5 | Oak | 20 | 0.000 | 0.943 | 0.000 | 0.000 | 0.015 | 0.000 | 0.000 | |
6 | 160 | 0.000 | 0.014 | 0.000 | 0.000 | 0.015 | 0.130 | 0.000 | ||
7 | 180 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.130 | 0.000 | ||
8 | 210 | 0.429 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | ||