Abstract:

The color change of veneers dyed by solution of Acid Blue 5R and Reactive Red X-3B after Xenon-lamp attenuation tests(110 h) is evident. During it had been being irradiated the color index (lightness L~*, the chromaticity coordinates a^* and b^*) had a large change, especial the change of b^* is increasing rapidly, the change of the color difference (ΔE^*ab) in the early period is far more than that in the middle and later period. The color change degree of veneers dyed by solution of higher concentration is larger than that of lower dye solution, the color change degree of bleached veneers dyed by solution is more than veneers dyed directly. The relation of the color change degree and dyeing time is not evident. It is difference that the law of color change veneers dyed by different dyes with Xenon-lamp attenuation.

Key words: I-214 poplar, dyed veneer, Xenon-lamp attenuation, lightfastness