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Effect of the internal structure on color changes in wood by painting transparent
Author(s) -
Ohshima Kazushi,
Sugimoto Hiroyuki,
Sugimori Masatoshi,
Sawada Emika
Publication year - 2021
Publication title -
color research and application
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.393
H-Index - 62
eISSN - 1520-6378
pISSN - 0361-2317
DOI - 10.1002/col.22649
Subject(s) - colorimeter , linseed oil , absorption (acoustics) , materials science , reflectivity , optics , penetration (warfare) , penetration depth , chemistry , composite material , mathematics , food science , physics , operations research
To clarify the mechanism of how the color of wood changes after being painted with oil, we measured the internal structure and optical properties in the visible light region of end‐grain linseed oil‐painted hinoki ( Chamaecyparis obtusa ) by X‐ray computed tomography and spectrophotometry, respectively. To compare the color measurements of different types of incident light, the color changes were measured with a spectral colorimeter. Quantitative analysis using X‐ray computed tomography images showed a positive correlation between oil penetration and the amount of oil applied. Optical property measurements showed that the largest change in reflectance was in the 430 to 480 nm region, which was affected by both absorption and transmission. We also inferred from a lack of increment in the absorption with increasing amounts of applied oil that the increase in the absorption was influenced by the increase in light passing through the walls of the wood cells.