The duration of permanent hair dye varies depending on factors such as hair growth, hair care routine, and the specific product used. Permanent hair dye is designed to last longer than other types of dyes, but it doesn't last forever. Typically, it can last around 6-8 weeks between touch-ups, but color fade can happen within a few weeks due to the water-soluble nature of hair dyes
. The ingredients in permanent hair dyes can include chemicals such as para- phenylenediamine, hydrogen peroxide, and ammonia, which are used to achieve the permanent color and can have potential health risks
. It's important to be aware of the ingredients in the hair dye and consider the potential positive and negative effects, as well as the proper care to extend the life of the dye.
