Wait at least 48 hours before shampooing
Shampooing hair right after the salon is just basically washing all that expensive dye down the drain. Let the colour sit on the hair for at least 48 hours before thinking about shampooing. The added time will allow for the pigments in the dye to properly soak in to the hair cuticle and allows for the cuticles to properly close, so that the colour doesn’t wash away.
Photo by Guilherme Petri