how long to wait after a bad hair dye job to redye
You can recolor hair after 6-to-12 washes when you use a semi-permanent hair dye. To help the color last even longer than 6-to-12 washes, use products designed for color-treated hair. But please use caution when recoloring your hair before the color has washed/faded out since this can put your hairâs health at risk.