Table 2.
Color coordinates based on CIELAB color space of wooden samples before coating application (W-R) and after coating application. ΔE* was calculated using the difference between uncoated (W-R) and coated wood samples. Statistical differences are reported as: *** p < 0.001, ** p < 0.01 and * p < 0.05.
| Before Coating (W-R) | After Coating | ||||||
|---|---|---|---|---|---|---|---|
| L* | a* | b* | L* | a* | b* | ΔE* | |
| WPU-R | 85.8 ± 3.8 | 6.4 ± 2.2 | 19.8 ± 2.0 | 71.8 ± 2.0 *** | 11.3 ± 1.1 | 31.4 ± 2.6 | 19.5 ± 4.9 *** |
| WPU-3:1 | 85.6 ± 6.7 | 6.0 ± 2.4 | 20.3 ± 2.6 | 37.6 ± 5.3 *** | 26.4 ± 2.6 *** | 30.0 ± 5.5 | 54.7 ± 7.6 *** |
| WPU-1:1 | 86.2 ± 3.5 | 5.9 ± 2.0 | 21.3 ± 2.0 | 21.0 ± 4.3 *** | 21.1 ± 4.2 *** | 11.4 ± 5.8 *** | 68.7 ± 5.7 *** |
| WPU-1:3 | 90.1 ± 2.4 | 4.0 ± 1.8 | 19.7 ± 2.4 | 10.8 ± 2.5 *** | 7.8 ± 5.7 | 0.3 ± 1.0 *** | 82.3 ± 3.9 *** |
| Mean W-R | 86.9 ± 7.3 | 5.6 ± 2.9 | 20.3 ± 3.0 | ||||