Efficacy of Some Plants Extracts for Natural Dyeing of Human Hair.

Interest in natural hair dyes is continuously growing as these are green alternatives to synthetic dyes. A single natural dye may not be the right color for many people. In this study three different mixtures of famous natural hair dye Lawsonia inermis with different other plants were evaluated for their new shades and dyeing properties. Color strengths of naturally dyed hair were also compared with synthetic dyes and individual plants as well. Mordanting was carried out using some metals and a natural mordant which increased the color strength and wash durability of natural dyes. Colorimetric properties of dyed hair were obtained in terms of CIEL*a*b* and K/S values. Maximum value of K/S was obtained by postmordanting of dyed hair with ferrous sulfate. Yellowish brown to brown shades were obtained by natural dye combinations which were changed to black after application of mordants. The color strength was acceptable even after twenty washes. Overall color strength values of naturally dyed hair with plant mixtures were much higher than individual plants extract. However, these color strength values are very comparable with the synthetic hair dyes proving natural dye combinations be successful candidates for natural hair dyeing with good performance and properties. [ABSTRACT FROM AUTHOR]

由于天然染发剂是合成染料的绿色替代品，人们对天然染发剂的兴趣正在不断增长. 单一的天然染料对许多人来说可能不是合适的颜色. 本研究以三种不同的天然染发剂莱索尼亚（Lawsonia inermis）与其他不同植物的混合染发剂，对其新的色度和染色性能进行了评价. 自然染色头发的颜色强度也与合成染料和个别植物进行了比较. 媒染剂是用一些金属和一种天然媒染剂进行的，这种媒染剂提高了天然染料的颜色强度和耐洗性. 根据CIEL*a*b*和K/S值，获得了染色头发的色度特性. 硫酸亚铁染发后K/S值最大. 黄棕色到棕色色调是通过自然染料组合获得的，在使用媒染剂后，这些颜色变为黑色. 即使洗了二十次，颜色强度也可以接受. 天然染发剂与植物混合染发的整体色强值远高于单独植物提取物. 然而，这些颜色强度值与合成染发剂非常相似，证明天然染料组合是天然染发剂的成功候选，具有良好的性能和性能. [ABSTRACT FROM AUTHOR]