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Fast-growing teakwood had been subjected to Mild Pyrolysis (MP) and combination (MP + steam) processes. Performa of treated wood was evaluated by surface color change, mass loss, and dimensional stability. The CIELab. system was used to evaluate the color change, while anti-swelling efficiency was used to determine dimensional stability. The two processes were conducted within pyrolysis reactor under atmospheric pressure in the presence of limited oxygen. MP process was applied by heating the wood for 2 hours at 170 and 190°C without steam, while combination process was employed by flowing steam for 0.5 and 1 hour during the 2 hours heating period. The result showed total color change and dimensional stability increased along with the increase in temperature. Even though MP process could reduced water absorption and swelling, but combination process permits a better results. Treated wood by MP and steam has lower total color change and mass loss, but greater dimensional stability.

Color and dimensional stability of fast growing teakwood by mild pyrolysis and combination process