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

2012; University of the Bío-Bío; Volume: 14; Issue: 2 Linguagem: Inglês

10.4067/s0718-221x2012000200010

0718-221X

Ana Lúcia Piedade Sodero Martins Pincelli, Luiz Fernando de Moura, José Ótávio Brito,

Wood and Agarwood Research

Eucalyptus saligna and Pinus caribaea var.hondurensis woods underwent a variety of thermal recti cation treatments (from 120ºC to 180ºC) to evaluate the e ect 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 recti cation can be regarded as a tool for adding value to wood through color modi cation by heating.Results also suggest that thermal recti cation 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 e ect of wood heating on the blue-yellow coordinate (b*), saturation (C), and tonality angle (H) was likely to be opposite between both tested species.