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- Title
EFFECT OF THERMAL RECTIFICATION ON COLORS OF EUCALYPTUS SALIGNA AND PINUS CARIBAEA WOODS.
- Authors
Martins Pincelli, Ana Lúcia Piedade Sodero; De Moura, Luiz Fernando; Brito, José Otávio
- Abstract
Eucalyptus saligna and Pinus caribaea var. hondurensis woods underwent a variety of thermal rectification treatments (from 120°C to 180°C) to evaluate the effect of heating on their colorimetric properties. The following color parameters were measured: lightness (L), a* coordinate (green-red coordinate), b* coordinate (blue-yellow coordinate), saturation (C), and tonality angle (H). This study demonstrates that thermal rectification can be regarded as a tool for adding value to wood through color modification by heating. Results also suggest that thermal rectification might be a tool for homogenizing wood tonality and reddish color between species. Both tested species have shown very distinct colorimetric behaviors as a function of thermal treatments. The conifer was more resistant to thermal darkening than the hardwood while exposed to temperatures below 160°C. The green-red coordinate (a*) and the tonality angle (H) tended to be homogenized for both species, as they decreased in eucalyptus, and increased in pinus, as a function of heating. The effect of wood heating on the blue-yellow coordinate (b*), saturation (C), and tonality angle (H) was likely to be opposite between both tested species.
- Subjects
THERMAL analysis; EUCALYPTUS saligna; PINUS caribaea; COLOR of wood; WOOD distillation; PLANT species; COLORIMETRIC analysis
- Publication
Maderas: Ciencia y Tecnología, 2012, Vol 14, Issue 2, p239
- ISSN
0717-3644
- Publication type
Article
- DOI
10.4067/S0718-221X2012000200010