How Long To Wait Before Coloring Hair Again - Type of hair dye and developer. First of all, how long you need to wait will depend on the color you’ve used. Web experts advise waiting at least 2 weeks (technically 15 days) before dyeing it again.
Type of hair dye and developer. Web experts advise waiting at least 2 weeks (technically 15 days) before dyeing it again. First of all, how long you need to wait will depend on the color you’ve used.