The Best Coloring Your Hair At Home References. Wash your hair 24 to 48 hours before dyeing. Always read the instructions either in or on the box.
Everything you need to know, from how much dye you need to the right application techniques. Make sure to do a strand and an allergy test (even if you have colored your hair before). The dye will blend more naturally with your hair, and that tends to make it last longer.
