In the 21st century, the modern industry is trending towards embracing environmental conservation for sustainability. As a result, there is an increasing consumer demand for natural hair dyes in the beauty industry. However, in the field of natural ha...
In the 21st century, the modern industry is trending towards embracing environmental conservation for sustainability. As a result, there is an increasing consumer demand for natural hair dyes in the beauty industry. However, in the field of natural hair coloring, the research on a wide range of natural dye colors is lacking, as it is currently limited to henna dyeing. Moreover, there is a lack of research on applying natural dyes to hair coloring techniques in actual beauty practices. Therefore, in this study, firstly, we aim to find natural hair coloring shades that look natural and beautiful while also being beneficial to the human body. Secondly, we will perform hair coloring using doll head samples, applying the popular foiling technique currently in trend. The research methodology involved a combination of theoretical research and empirical research through experimentation. In the theoretical research phase, we explored the concepts, types, and characteristics of natural dyes and mordants, as well as the structure and characteristics of hair in relation to hair color design and design techniques. In the empirical study, virgin hair was bleached to create experimental hair swatches. Then, using six different mordants, including errous sulfate, potassium aluminum sulfate, cooper formate, them to the naked eye. For mulberry dye, except for errous sulfate mordant, all the hair swatches exhibited soft-toned yellowish colors, with no significant visual difference between them. The HV/C value for the non-mordanted hairpiece was 0.6G 4.5/3.6, while for the errous sulfate mordant it was 0.3GY 3.0/2.5. With potassium aluminum sulfate mordant, it showed 2.0G 3.8/2.8, with copper formate mordant it displayed 3.1G 3.3/2.8, and with sodium hydroxide mordant it resulted in 2.7G 2.2/2.9. Madder dye resulted in warm shades of yellow and orange overall. However, the hair swatches dyed with copper formate mordant showed an HV/C value of 7.2Y 4.5/3.2, while with errous sulfate mordant it was 8.9Y 3.2/3.1. For lac dye, it generally produced dark-toned and deep-toned reddish shades, with all the hair swatches having ΔE values exceeding 50.
Secondly, three colors were selected through a survey of 66 hair color specialists using 42 hair swatches dyed with natural dyes. The selected colors for different styles are as follows:
For the highlights style, the color is an ash gray (6.4PB 3.6/0.4) obtained by treating indigo natural dye with sodium hydroxide mordant. For the sombré style, the color is a reddish violet (4.8RP 3.5/4.5) obtained by using cochineal natural dye with potassium aluminum sulfate as the mordant, known for its hair-friendly properties. For the balayage style, the color is an orange shade (2.8YR 5.1/9.2) obtained by using gromwell natural dye with citric acid mordant as the mordant.
This research demonstrates the application of natural dyes in hair coloring styles such as highlights, sombré, and balayage. It provides foundational data for utilizing natural dyeing agents in hair coloring with sustainable and environmentally friendly approaches.