In this research, we used dyes from natural source for hair coloring. Due to the toxicity of chemically synthesized dyes, natural dyes have been studied for hair coloring without any side effects.
Pomegranate powder, gardenia seed powder, and walnut bark powder have been used as natural dyes and Hena was used to enhance coloring effect. For the three different natural dyes, the hair coloring effects, hair surface changes, and color changes were determined with optical and scanning electron microscopes. When hair was stained with natural dye only, the hair coloring was not good as that with chemically synthesized dye. We used commercially available stain to enhance the coloring effect and could achieve good hair coloring. The dye particle size was another important factor for hair coloring. Small size dye particles can easily penetrate into hair and enhance hair coloring effect.