Review Of Double Process Hair Coloring 2023. The colorist will first bleach the hair completely, then tone it to create your desired shade. First the hair is bleached to remove your natural color, then toned to create the shade you’re going for.

It is also the secret behind most excellent. When it comes to double processing, the possibilities are endless on the combinations of dying your hair in multiple steps. Double process on the other hand is a little more complicated.