When hair has been colored using hair dye/colour, the roots tend to be the first places to show it, since that is where the new hair comes in. A root touch-up is simply an application of hair dye/colour to the roots of the hair, to disguise the fact that hair has grown out, and to make a hair coloring last longer. Root touch-ups may be done at a salon or at home.
Generally, hair will need to be colored every four to six weeks, but a root touch-up can increase the time between appointments or home colorings. There are two ways to do a root touch-up at home. The first is to simply use a standard box of hair dye; it may be a good idea to purchase two boxes when first buying the hair dye, to be certain to get the same color. The box will include directions for dyeing a whole head of hair or simply the roots; follow the directions for dyeing the roots.
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