泡桐单板染色因素对色差的影响

Effects of Paulownia Veneer Dyeing Factors to the Chromatism

本文采用酸性大红染料对木材进行染色试验 ,以染液组成和染色工艺为试验因素 ,用正交方法对木材色差和上染率进行观测和分析。试验结果表明 ,Na Cl是使泡桐单板染色色差增加的第一作用因素 ,最佳浓度是 1 .5%。处理温度是第二作用因素 ,50℃的温度对色差和上染率都是有利的。表面活性剂是第三作用因素 ,最佳浓度是 0 .1 %。最佳染色时间 4 h,作用因素居第四位。乙酸最佳作用浓度 2 % ,是第五作用因素。染料浓度变化对色差没有造成明显的变化 ,染料浓度 0 .5%时上染率最高 ,染料利用率也高 。

The chromatism and dye up take were studied by orthogonal method according to the changes of the parameters of dyeing. The 0.5 mm sliced Paulownia veneer was dyed in aqueous solution of the acid bright red. The result showed that NaCl concentration was the most important factor to the chromatism of dyed samples before and after dyeing , and the best concentration was 0.5%. The dyeing temperature was the second factor and 50 ℃ was appropriate to both chromatism and dye up take. The concentration of surface active agent was the third factor and best concentration was 0.1%. As the 4th factor, the most suitable treating time was 4 hours .Acetic acid was the 5th factor to dyeing effects of Paulownia veneer with the best concentration of 2%. There was not obvious change in chromatism caused by concentration change of dye solution , and the best concentration was 0.5% in dye up take .