How Long Does A Black Hair Rinse Last?
A black hair rinse typically lasts between 4 to 6 weeks, depending on the porosity of your hair and how often you wash it. The color will gradually fade over time and may require a touch-up to maintain the desired result. Using sulfate-free shampoos and avoiding prolonged exposure to the sun or chlorine can also help prolong the lifespan of a black hair rinse.