THERMAL MODIFICATION OF Eucalyptus grandis WOOD: VARIATION OF COLORIMETRIC PARAMETERS

Pedro Henrique   Gonzalez de Cademartori; Eduardo   Schneid; Darci Alberto   Gatto; Diego   Martins Stangerlin; Rafael   Beltrame

THERMAL MODIFICATION OF Eucalyptus grandis WOOD: VARIATION OF COLORIMETRIC PARAMETERS

Autores

Pedro Henrique Gonzalez de Cademartori

Eduardo Schneid

Darci Alberto Gatto

Diego Martins Stangerlin

Rafael Beltrame

Editor

Universidad del Bío Bío

Descripción

The color modifications in Eucalyptus grandis thermally modified wood were investigated. Onehundred eighty specimens (10 x 10 x 200 mm) were prepared and thermally modified in an electric kiln for 4 and 8 h at 180-240ºC. The color parameters (L*, a*, b*, C*, h* and ΔE) were determined by the CIE-L*a*b* method on radial and tangential sections of untreated and treated wood. The results indicated the darkening of specimens in the radial and tangential sections. Both sections showed variation of L* between 73 and 30, a* between 9 and 5 and b* between 20 and 8. The thermally modified wood at 180 and 200ºC showed similar patterns, equally at 220 and 240ºC. The time of exposure indicated significance just in treatment at 200ºC.