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Eucalyptus saligna and Pinus caribaea var. hondurensis woods underwent a variety of thermal rectication treatments (from 120oC to 180oC) to evaluate the eect of heating on their colorimetric properties.  e following color parameters were measured: lightness (L), a* coordinate (green-red coordinate), b* coordinate (blue-yellow coordinate), saturation (C), and tonality angle (H).  is study demonstrates that thermal rectication can be regarded as a tool for adding value to wood through color modication by heating. Results also suggest that thermal rectication 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.  e conifer was more resistant to thermal darkening than the hardwood while exposed to temperatures below 160 o C.  e 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.  e eect of wood heating on the blue-yellow coordinate (b*), saturation (C), and tonality angle (H) was likely to be opposite between both tested species.

Effect of thermal rectification on colors of Eucalyptus Saligna and Pinus caribaea Woods