MODIFICATION OF THE ORIGINAL COLOR OF THE Eucalyptus grandis WOOD BY HEAT TREATMENTS

• Autor(a) principal: Garcia, Rosilei Aparecida
• Data de Publicação: 2016
• Outros Autores: Lopes, Juliana de Oliveira, Santos, Wanessa Aparecida
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Cerne (Online)
• Texto Completo: https://cerne.ufla.br/site/index.php/CERNE/article/view/1007
• topic: Colorimetry; Eucalyptus grandis; CIE L*a*b* system; heat treatment.

The objective of this study was to determine the modification of original color of Eucalyptus grandis Hill ex. Maiden wood after heat-treatment. Wood samples were heat-treated under different temperatures (180, 200, 215 and 230oC) and time conditions (15 minutes, 2 and 4 hours). Color analysis were performed on the CIE L*a*b* system by using a Color Eye XTH-X-Rite 200d spectrophotometer. All heat treatments promoted an alteration of the original color of wood. Heat-treated woods presented lower L* (lightness) values than untreated wood (control), characterizing the wood darkness, mainly for more severe conditions of temperature and time. Chromatic coordinates (a* and b*) showed different behaviors depending on the temperature-time combination. The modification of the original color of the wood allowed the creation of new color patterns, which can add greater value to the studied wood.