38+ What Is Permanent Color Hair Dye Pics. Moving onto permanent hair color, you'll find the real deal: Permanent hair dye is hair coloring that lasts for a long time, usually up to eight weeks.
For permanent dye, choose a color a smidge darker than what you want because of the strong developer, says ionato.
This sort of dye often has bright, unnatural colors or metallic and pastel what about demi permanent hair dye? Permanent haircolor contain chemicals that remove color from your strands as well as pigments that change your hair's current color. Ammonia and hydrogen peroxide act together to open up the cuticle, interact with the melanin and keratin (those are responsible for color and texture), and change the structure in order to deposit dye. To help, we've compiled advice from our favorite hair pros about every when applying the dye, use a color brush to get more professional, precise results.