Color changes and smoke penetration of jabon (Anthocephalus cadamba) and tusam (Pinus merkusii) woods after smoke treatment

Abstract

Wood color is one of the physical properties that influence aesthetic values. Color has an important place regarding to human's style. Color can be the preferential factors prior to people when making a decision to purchase wood products. The aim of the research was to evaluate the impact of smokes period (one-, two-, and three-week) on the color change and smoke penetration of tusam (Pinus merkusii) and jabon (Anthocephalus cadamba) woods. The smoke was generated from pyrolysis of salam (Syzygium polyanthum) wood. Color evaluation was done with CIEL∗a∗b∗ method. The assessment of smoke penetration was done with visual identification using ImageJ application. The results demonstrated that smoke treatment resulted in the color change of the wood. Smoke treatment caused value of L∗ (lightness), a∗ (red-green), and b∗ (yellow-blue) of wood treated were decreasing from original wood. The wood was darker with longer period of smoke. Appearance of smoked wood was different totally from original color of wood. In visual identification showed that smoke was penetrated less than 1 mm of each wood. It was found that all smoke periods can be applied for natural coloring for smoky color type.