+29 Ion Semi Permanent Hair Color How Long To Leave On 2023. Web it generally lasts through a few washes and can go even longer if you use the right products. The more you wash, the quicker it will fade.
The less you wash, the slower it will fade. Web the color service. Web tip 1 wait at least 72 hours before shampooing it can take a while for the cuticle layer to close and trap the hair dye.
