Introduction
Hair dye is getting more and more popular now compare to when it was first invented. Many people use hair dye to cover the grey hairs, and others choose to change their hair color simply under the influence of fashion. For me personally, I have dyed my hair twice in the past and I am very curious about the hair dyeing process. There are three different kinds of hair dyes, temporary, semipermanent, and the most popular, permanent dyes. In my research project I will look at the chemistry behind the hair dyes, especially how the pigments are able to stay in our hair for a long period of time.
Hair dye is getting more and more popular now compare to when it was first invented. Many people use hair dye to cover the grey hairs, and others choose to change their hair color simply under the influence of fashion. For me personally, I have dyed my hair twice in the past and I am very curious about the hair dyeing process. There are three different kinds of hair dyes, temporary, semipermanent, and the most popular, permanent dyes. In my research project I will look at the chemistry behind the hair dyes, especially how the pigments are able to stay in our hair for a long period of time.