%0 Journal Article
%T Effect of thermal rectification on colors of Eucalyptus Saligna and Pinus caribaea Woods
%A Ana L¨²cia Piedade Sodero Martins Pincelli
%A Luiz Fernando de Moura
%A Jos¨¦ Ot¨¢vio Brito
%J MADERAS : Ciencia y Tecnolog¨ªa
%D 2012
%I Universidad del B¨ªo-B¨ªo
%X Eucalyptus saligna and Pinus caribaea var. hondurensis woods underwent a variety of thermal rectification treatments (from 120oC to 180oC) 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 160oC. 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.
%K Eucalyptus
%K pinus
%K thermal treatment
%K color
%U http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-221X2012000200010