Color Stability of Heat-Treated Okan Sapwood during Artificial Weathering


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This study describes experiments of testing the color stability of heat-treated okan sapwood samples. Heat-treatment was done at 160°C,180°C,200°C,220°C during 4 hours, under steam. series of experiments were carried out to investigate the color stability of heat-treated okan sapwood compared to untreated wood during 100 hours xenon light irradiation. Color measurements during accelerated weathering were made at intervals throughout the test period. The results are presented in △E* and L* a* b*coordinates according to the CIE(1976)L*a*b* parameters color system. Better photo-stability in terms of color changes was recorded for heat-treated wood compared to the untreated one. The properties of heat treated wood are involved in the heat-treated wood resistanceagainst xenon light under experimental conditions.



Advanced Materials Research (Volumes 197-198)

Edited by:

Huaiying Zhou, Tianlong Gu, Daoguo Yang, Zhengyi Jiang, Jianmin Zeng




Q. Shi and J. H. Jiang, "Color Stability of Heat-Treated Okan Sapwood during Artificial Weathering", Advanced Materials Research, Vols. 197-198, pp. 13-16, 2011

Online since:

February 2011




[1] W. Sanderman, F. Schlambom F. On the effect of filtrated ultraviolet light on wood-PartⅠand Part Ⅱ. Holz Roh –Werkstoff. 20(2): 245, 285(1962).

[2] P. Bekhta, P. Niemz. Effect of high temperature on the change in color, dimensional stalility and mechanical properties of spruce wood. Holzforschung. 57(5): 539-546(2003).


[3] P. J. Bourgois, G. Janin, R. Guyonnet. The color measurement: A fast method to study and to optimize the chemical transformations undergone in the thermally treated wood. Holzforschung. 45(4): 377-382(1991).

[4] C. Hansmann, M. Deka, et al. Artificial weathering of wood surfaces modified by melamine formaldehyde resins. Holz Roh- Werkst, 64(2): 198-203(2006).


[5] A. McDonald, M. Fernandez. Chemical and UV-VIS spectroscopic study on kiln brown stain formation in Radiata pine. In: 9th international symposium of wood and pulping chemistry, Montreal, vol 70, 1-5(2002).

[6] Mitsui K, Takada H et al. Changes in the properties of light –irradiated wood with heat treatment: Part 1 Effect of treatment conditions on the change in color. Holzforschung. 55(6): 601-605(2001).


[7] B. Sundqvist. Color changes and acid formation in wood during heating. Doctoral Thesis, Lulea University of Technology, (2001).

[8] Sehistedt-Persson. Color respinses to heat treatment of extractives and sap from pine and spruce. In: 8th International IUFRO wood drying conference, Brasov, 459-464(2003).

[9] DNS Hon. Weathering and photochenistry of wood. In: Hon DNS, Shiraishi N(Ed) Wood and cellulosic chemistry, 2nd edition. Marcel Dekker, New York, 512-546(2001).

[10] B. George, E. Suttie, et al. Photo degradation and photo stability of wood –the state of art. Polym Degrad Stab 88(2)268-274(2005).

[11] P.D. Evans, NL Owen, et al. Weathering and photostability of benzoylated wood. Polym Degrad Stab, 76(2)291-303(2002). 64(2): 198-203(2006).

[12] M. Petric,B. Kricej, et al. patination of cherry wood and spruce wood with ethanolamine and surface finishes. Surf Coat Int Part B, Coat(2003).


[13] N. Ayadi, F. Lejeune, et al. Color stability of heat treated wood during artificial weathering. Holz Roh- Werkst, 61(2): 221-226(2003).