What is a fixed hair mask?

Fixing the hair mask is to keep the hair color for a long time after dyeing. The main component of fixing hair mask is amino acid, which will stimulate the scalp and make it wither and lose its luster. Excessive use of fixed hair mask will make scalp dry, crack, and even skin diseases. But not to the point of cancer. Fixing method after dyeing: reduce the water temperature when shampooing. The higher the water temperature, the greater the opening of hair scales, which will accelerate the process of pigment loss. Therefore, the water temperature during shampooing can be reduced to close to human body temperature.