含水率变化对三种木材色度学参数的影响

摘要

为揭示含水率变化对古夷苏木、筒状非洲楝和水曲柳三种木材色度学参数的影响,采用CIE(1976) L*a*b*标准色度学系统及均匀颜色空间对试样材色进行测量,结果表明:三种木材明度随含水率的增大均呈现逐渐下降的趋势.随含水率的增大,三种木材的色调分别表现为古夷苏木从R(红)逐渐变为Y(黄),筒状非洲楝由YR(黄红)色变为Y(黄),水曲柳由R(红)最后变为YR(黄红).古夷苏木和筒状非洲楝的色饱和度随含水率的变大而逐渐变小,水曲柳则先略微增加后下降至平稳.三种木材的红绿轴色品指数a*和黄蓝轴色品指数b*在不同含水率条件下变化规律各异.研究结果为含水率变化对三种木材表面视觉性质影响的综合评价及其加工利用提供了理论依据.%In order to reveal the influence of moisture content change on chromaticity parameters of Guibourtia tessmannii,Entandrophragma cylindricum and Fraxinus mandshurica,using the CIE (1976) L*a*b* standard colorimetric systems and color difference meter to measure the sample color.The result showed that the brightness of three kinds of wood decreases with the increase of moisture content.Along with the increase of moisture content,the tones of G.tessmannii gradually change from R to Y,E.cylindricum gradually change from YR to Y,F.mandshurica change from R to YR finally.The saturation of G.tessmannii and E.cylindricum gradually decreases with the increase of moisture content.The saturation of F.mandshurica first increases and then decreases to steady.The a* and b* of three kinds of wood show different change rules under different moisture content.These results provide a theoretical guide for the comprehensive evaluation,processing and utilization of influence of moisture content change on chromaticity parameters of three kinds of decorative wood.