Table 1.
Change of L*a*b* value of the three wood species at different temperatures.
Royal paulownia |
| Control | 160°C | 180°C | 200°C | 220°C |
|
|
L* | 74.57±0.1 | 72.87±0.9 | 71.19±1.9 | 54.23±1.6 | 34.12±0.2 |
a* | 5.86±0.2 | 6.66±0.2 | 8.91±0.6 | 12.63±0.1 | 9.44±0.3 |
b* | 15.83±0.4 | 17.79±0.6 | 21.35±1.0 | 24.84±0.5 | 14.80±0.4 |
Suwon silver poplar |
| Control | 160°C | 180°C | 200°C | 220°C |
|
|
L* | 72.35±3.0 | 77.85±3.4 | 74.84±3.4 | 43.72±1.3 | 31.99±2.5 |
a* | 6.07±0.2 | 6.76±1.1 | 10.00±0.3 | 11.64±0.2 | 8.28±0.8 |
b* | 15.17±0.2 | 18.68±1.1 | 22.71±0.2 | 19.05±0.3 | 11.54±1.9 |
Korean red pine |
| Control | 160°C | 180°C | 200°C | 220°C |
|
|
L* | 72.611±.2 | 70.82±1.0 | 72.40±1.0 | 29.40±0.9 | 35.82±0.9 |
a* | 12.87±1.3 | 9.68±0.1 | 9.68±0.1 | 11.07±0.3 | 12.44±0.4 |
b* | 31.64±1.2 | 24.63±0.3 | 24.63±0.3 | 7.97±0.7 | 17.26±0.6 |