Precious wood imitating dyeing method

Abstract

The invention discloses a precious wood imitating dyeing method. The precious wood imitating dyeing method comprises the following technology steps that firstly, dye liquor is prepared, the dye liquor is prepared through three kinds of dyestuff including reactive red, reactive yellow and reactive blue according to the mass ratio of (2-3):(4-7):1, sodium chloride or sodium sulfate with the concentration of 5 g / L-40 g / L is added to serve as a dyeing accelerant, and sodium carbonate or ammonium chloride or propylene glycol with the concentration of 20 g / L-60 g / L is added to serve as a dye fixing agent; and secondly, impregnation dyeing is conducted, dyed wood is immersed in the dye liquor with the concentration of 0.5%-5% and the bath ratio of 1:(10-40) in a vacuum impregnation tank, dyeing is conducted in a negative pressure and positive pressure alternating manner, the dye liquor sufficiently seeps into the wood, and the surface, the inner portion and the outer portion of the dyed wood are uniform. The method has the beneficial effects that the wood treated through the provided precious wood imitating dyeing formula and the provided dyeing method is clear in texture, the total color difference between the wood color and the target wood color is smaller than or equal to 1.5 NBS, and permeability and color uniformity of the dyeing liquor are good.

Description

technical field [0001] The invention relates to a wood imitation precious dyeing method, which belongs to the field of wood modified deep dyeing. Background technique [0002] Precious wood is generally darker and more elegant in color, and is loved by people. However, as traditional forest wood supply countries with rich forestry resources have successively introduced policies to prohibit or restrict the export of logs, the global supply of wood has become tense. Recently, the main producing countries of valuable timber such as Myanmar, Laos, and Cambodia have successively promulgated logging bans and announced a total ban on timber export, further exacerbating the plight of domestic timber shortage, especially precious timber has become a rare resource, and it is difficult to meet the market demand for precious timber. By dyeing ordinary wood with imitation precious wood, the material color effect similar to that of precious wood can be obtained, which can effectively alle...

AI Technical Summary

Problems solved by technology

Due to the blocking effect of the inclusions in the wood on the penetration of the solvent in the dyeing solution, the dye stays on the surface of the wood. The current dyeing technology is mostly for veneer or veneer, and it is impossible to deeply dye the wood.