3种木材涂饰前后表面视觉性质差异的研究

Differences of Surface Visual Physics Magniture of Three Kinds of Timber Before and After Painting

测定分析了筒状非洲楝Entandrophragma cylindricum,古夷苏木Guibourtia tessmannii和水曲柳Fraxinus mandschurica木材醇酸清漆涂饰前后表面视觉性质的差异。结果表明,涂饰处理降低了3种木材表面的明度(L*)和红绿轴色品指数(a*)值,其中,古夷苏木的L*变化差异最大,明度降低明显;水曲柳的红绿轴色品指数差(Δa*)绝对值最大,相比处理前更偏向绿色;3种木材透明涂饰后的黄蓝轴色品指数(b*)均有所升高,黄蓝轴色品指数差(Δb*)绝对值由大到小分别为水曲柳>古夷苏木>筒状非洲楝,数值越大越趋于黄色;总体色差(ΔE*)变化差异不大,涂饰对3种木材的总体色差影响不明显。

Determinations were conducted on visual physics magnitude of Entandrophragma cylindricum, Guibourtia tessmannii and Fraxinus mandschurica wood before and after painting alkyd varnish. The results show that painting reduced the luminance （L＊） and the chrominance （a＊） of tested wood specimen, the biggest change L＊ was specimen of G. tessmannii wood with obvious decrease of luminance. The absolute value （Δa＊） of F. mandschurica wood was the largest, greener than that of untreated one. The chrominace （b＊） of three kinds of wood specimen increased after painting, and the absolute Δb＊ was ordered by specimen of F.mandschurica 〉 G. tessmannii 〉 E. cylindricum. Chrominance aberration （ΔE＊） of tested wood specimen had little difference before and after painting.