ABSTRACT

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.

摘要

对天然染发剂的兴趣不断增长，因为它们是合成染料的绿色替代品。对于许多人来说，单一的天然染料可能不是正确的颜色。在这项研究中，我们评估了三种不同的著名天然染发剂Lawsonia inermis与不同其他植物的混合物的新色调和染色特性。自然染色头发的颜色强度也与合成染料和单个植物进行了比较。使用一些金属和天然媒染剂进行媒染，这增加了天然染料的颜色强度和耐洗性。根据CIEL*a*b*和K/S值获得染色头发的比色特性。K/S最大值通过用硫酸亚铁对染过的头发进行后媒染而获得。通过天然染料组合获得黄棕色至棕色色调，在施加媒染剂后变为黑色。即使在二十次洗涤之后，颜色强度也是可以接受的。用植物混合物自然染色的头发的整体颜色强度值远高于单个植物提取物。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具有良好性能和特性的天然染发剂的成功候选者。