Keywords: 
• forest engineering /
• Calamus simplicifolius /
• Daemonorops margaritae /
• dyeing /
• dye uptake

Abstract: Rattan dyeing can improve its visual characteristics and color stability. To obtain the best dyeing conditions for two species of rattan，Calamus simplicifolius and Daemonorops margaritae，monochromic dyeing experiments were conducted using four dye types （Reactive Red 2 and Reactive Yellow 1，Direct Red 23 and Direct Blue 15，Basic Red 14 and Basic Yellow 2，and Acid Red 85 and Acid Yellow 11）. Dye uptake capability for the two rattan species and the main factors that influenced dye uptake of split rattan were also determined. Results showed that the four types of dye could color the split rattan，whereas the original，unsplit rattan，even with acid or alkali preconditioning，could not. Suitable dyeing conditions for the four dye types were：1） reactive dyes concentration：5.0 gkg－1，time：2 h，temperature：40 ℃；2） direct dyes concentration：Direct Red 23 is 9.0 gkg－1，Direct Blue 15 is 7.0 gkg－1，dyeing time：2 h，temperature：40 ℃；3） basic dyes concentration：Basic Red 14 is 9.0 gkg－1，Basic Yellow 2 is 5.0 gkg－1；dyeing time：2 h，temperature：70 ℃；and 4） acid dyes concentration：Acid Red 85 is 7.0 gkg－1，Acid Yellow 11 is 9.0 gkg－1，dyeing time：2 h，temperature：70 ℃. Within the same dye type，preferences for dye uptake were：Reactive Yellow 1 ＞ Reactive Red 2，Direct Red 23 ＞ Direct Blue 15，Basic Red 14 ＞ Basic Yellow 2，and Acid Yellow 11 ＞ Acid Red 85. This research could have a positive influence on production in the rattan industry.［Ch，3 fig. 21 ref.］