Research Article
The Effects of Natural Weathering on Color Stability of Impregnated and Varnished Wood Materials
Table 3
The color changes of Oriental beech before and after natural weathering.
| | n | Before natural weathering | After 3-month natural weathering | After 6-month natural weathering | L | a | b | ΔL | Δa | Δb | ΔE | ΔL | Δa | Δb | ΔE | | Mean | SD | Mean | SD | Mean | SD | Mean | SD | Mean | SD | Mean | SD | Mean | SD | Mean | SD | Mean | SD | Mean | SD | Mean | SD |
| Control | 10 | 62.30 | 7.60 | 10.78 | 1.38 | 21.78 | 3.01 | −9.84 | 1.40 | −9.83 | 1.26 | 9.94 | 1.31 | 17.10 | 2.60 | −19.35 | 2.55 | −12.3 | 1.87 | −8.63 | 1.05 | 24.50 | 3.14 | PV | 10 | 68.07 | 7.35 | 12.60 | 1.20 | 27.04 | 4.19 | 8.92 | 1.23 | −5.37 | 0.62 | 9.36 | 1.20 | 14.00 | 1.93 | −14.78 | 1.89 | −9.66 | 1.33 | −10.07 | 1.09 | 20.33 | 2.34 | SV | 10 | 63.54 | 5.46 | 12.74 | 1.48 | 28.11 | 3.71 | 7.87 | 0.83 | −5.65 | 0.66 | 8.45 | 1.23 | 12.86 | 1.49 | −13.18 | 1.92 | −10.16 | 1.18 | −9.75 | 0.84 | 19.29 | 2.24 | CCA + PV | 10 | 60.53 | 5.57 | 12.15 | 1.56 | 28.51 | 3.93 | 7.78 | 0.95 | −3.53 | 0.45 | 8.25 | 1.25 | 11.88 | 1.45 | −13.63 | 2.07 | −7.85 | 0.96 | −7.53 | 0.69 | 17.44 | 2.41 | AD-KD5 + PV | 10 | 54.27 | 6.13 | 14.77 | 1.42 | 28.73 | 4.48 | 7.60 | 1.01 | −3.39 | 0.53 | 7.26 | 0.89 | 11.04 | 1.47 | −11.35 | 1.40 | −9.41 | 1.25 | −5.18 | 0.59 | 15.63 | 2.44 | TN-E + PV | 10 | 38.69 | 3.52 | 3.14 | 0.43 | 10.06 | 1.39 | 5.86 | 0.71 | −3.97 | 0.55 | 6.95 | 0.77 | 9.92 | 1.20 | −5.87 | 0.65 | −6.81 | 0.82 | −6.95 | 0.63 | 11.36 | 1.57 | CCA + SV | 10 | 61.46 | 5.10 | 11.90 | 1.42 | 28.96 | 4.89 | 6.92 | 0.78 | −5.48 | 0.65 | 5.84 | 0.66 | 10.58 | 1.20 | −13.02 | 1.47 | −8.86 | 0.91 | 8.73 | 0.72 | 18.01 | 2.14 | AD-KD5 + SV | 10 | 58.21 | 6.46 | 12.43 | 1.70 | 27.50 | 3.77 | 6.83 | 0.96 | −5.38 | 0.74 | 5.89 | 0.77 | 10.50 | 1.48 | −10.56 | 1.38 | −9.13 | 1.29 | −7.81 | 0.87 | 16.00 | 2.19 | TN-E + SV | 10 | 35.51 | 4.40 | 2.83 | 0.33 | 8.87 | 1.22 | 6.55 | 0.81 | −4.83 | 0.57 | 5.86 | 0.73 | 10.03 | 1.24 | −6.85 | 0.85 | −7.19 | 0.89 | −7.24 | 0.90 | 12.29 | 1.45 |
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Note. : the number of measured samples. Mean (): average value of measurements. SD: standard deviation.
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