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Wouldn't it be wonderful if you could freeze your hair growth once you get the perfect cut and the perfect set of highlights? Unfortunately, you can't. You must maintain your highlights to get rid of those gawd-awful dark roots. Sometimes, though, your stylist may get a little overzealous and turn your hair blindingly blond at the roots, leaving the ends looking a bit under colored. If you've got too much frost on top, fix it by weaving in a darker color.
Pull a frosting cap over your dry and tangle-free hair. Keep it nice and snug by tying the strings under your chin.
Pull strands of your hair through the holes on the frosting cap with the frosting needle. Don't pull too much through or you will end up with the opposite problem. If your roots are totally blondified, pull hair through every other hole. If they're just slightly off balance with the rest, pull through a strand here and there to even out the color.
Mix a bottle of hair color that closely matches the darker strands of your hair with an even amount of 10-volume color developer. Shake the bottle to mix the two after you screw on and tighten the lid -- keep your finger over the hole or risk a messy cleanup. Prevent staining your hands and nails by putting on a pair of gloves before application begins.
Apply the color to the blond root area only. Do not pull the color through to the ends or let the color run down the strands.
Set a timer for 25 minutes. Rinse the color off of the frosting cap. Remove the cap, then shampoo and condition your hair.