Permanent hair dyes were invented in 1907 and have barely changed since then. They were created at a time when there was less awareness of the harmful effects of the toxins, endocrine disruptors, coal tar dyes, carcinogens, and other chemicals that cause continual damage to the hair and scalp.
Hairprint functions in a way that is the opposite of how hair dyes work. Rather than stripping hair of its color and inserting coal tar dyes, which all permanent hair-coloring products do, Dr. Warner's process mimics how hair gets its true color in the first place. The color responsible for all brown and black hair is eumelanin, which is a variation of the melanin pigment that is responsible for the color of your skin and eyes. The reason Hairprint looks so natural on your hair is because it is natural.
