Journal
HOLZFORSCHUNG
Volume 65, Issue 3, Pages 361-368Publisher
WALTER DE GRUYTER GMBH
DOI: 10.1515/HF.2011.040
Keywords
CIEL*a*b*; color change; heat treatment; historical building; kinetic analysis; natural aging
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Funding
- Japan Society for the Promotion of Science (JSPS) [20248020, 21.2994]
- Grants-in-Aid for Scientific Research [20248020] Funding Source: KAKEN
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The color properties of aging wood samples from historical buildings have been compared with those of recent wood samples that were heat treated at temperatures ranging from 90 degrees C to 180 degrees C. The results of kinetic analysis obtained by the time-temperature superposition method showed that the color change during natural 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. In one sample, the color change (Delta E-ab*) after 921 years at ambient temperature was almost equivalent to that of heating (artificial aging) approximately for 6.7 h at 180 degrees C. The results have been interpreted that the aging and the subsequent change in wood color begin at the time of tree harvesting.
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