TESTING OF BLEACHING ON COCOBOLO (Dalbergia retusa Hemsl.,) WOOD

Abstract

In this study, the effects of single and double component wood bleaching chemicals on the color parameters, glossines values and whiteness index values of cocobolo (Dalbergia retusa Hemsl.,) wood were investigated. Single and double component bleaching chemicals were applied to the wood material surfaces with the application technique in line with the company’s recommendations. Test measurements were made on bleached and unbleached wood materials. Obtained results were compared with each other. According to the determined results, lightness (L*) value, chroma (C*) value, red (a*) color tone, yellow (b*) color tone, hue (ho) angle value, glossiness values perpendicular to fibers (⊥) and parallel (║) directions at 60o, glossiness value at 85o in parallel (║) direction to the fibers, and whiteness index (WI*) values in perpendicular (⊥) and parallel (║) directions to the fibers were determined. The ∆E* values were found to be 10.22 in the double component and 2.31 in the single component. While the two-component bleaching chemical caused an increase in L*, b*, a*, C* and ho values, it caused a decrease in the one-component bleach chemical. All WI* values were increased with two component bleaching chemicals. The glossiness values at 60° in the perpendicular and parallel directions to the fibers were decreased with one component bleaching chemical. The bleaching chemicals used in the study caused different results on wood material surfaces.