permanent ammonia-free keratin hair color. It is the result of a long and intense research effort by the faipa cosmetics laboratories to achieve una technical innovation in the coloring range that takes into account the need to maximize the protection of the struttura of the hair and, at the same tempo, to achieve una coloring that meets the expectations of the most demanding hairdressers. It is una technical innovation being gentle on the hair as it is free from the aggressiveness of ammonia. The struttura of the hair is protected and reinforced by the presence of keratin, which provides greater compactness and resistance to traction, translating to greater softness and smoothness to the touch.