Aging of wood - Analysis of color changing during natural aging and heat treatment

Miyuki Matsuo (1) , Misao Yokoyama (1) , Kenji Umemura (1) , Junji Sugiyama (2) , Shuichi Kawai (1) , Joseph Gril (3) , Shigeru Kubodera (4) , Takumi Mitsutani (5) , Hiromasa Ozaki (6) , Minoru Sakamoto (7) , Mineo Imamura (7)

1 RISH - Research Institute for Sustainable Humanosphere
2 Laboratory of Biomass Morphogenesis and Information
3 MAB - Mécanique de l'Arbre et du Bois
4 The Japanese Association for Conservation of Architectural Monuments
5 Nara National Research Institute for Cultural Properties
6 Paleo Labo Co.
7 National Museum of Japanese History [Chiba]

The color properties of aging wood samples from historical buildings have been compared with those of recent wood samples that were treated at temperatures ranging 90 to 180 °C. The result of kinetic analysis obtained by the time-temperature superposition method showed that the color change during natual aging was mainly due to a slow and mild oxidation process. In other words, heat treatment could accelerate the changes in wood color that occur during aging. The results has been interpreted that the aging and the subsequent change in wood color begin at the same time of tree harvesting.

Mots clés: CIEL*a*b; color change; heat treatment; historical buildings; kinetik analysis; natural aging

Domaines: Mécanique des matériaux [physics.class-ph]; Mécanique des matériaux [physics.class-ph]

Miyuki Matsuo, Misao Yokoyama, Kenji Umemura, Junji Sugiyama, Shuichi Kawai, et al.. Aging of wood - Analysis of color changing during natural aging and heat treatment. Holzforschung, 2011, 65 (3), pp.361-368. ⟨10.1515/HF.2011.040⟩. ⟨hal-00702706⟩