Q: My daughter used a red "wash in wash out" color on her hair about 9 weeks ago and although it was supposed to wash out in
8 - 10 washes there are still remnants of the color in her hair. We have tried using and anti dandruff shampoo to remove the remainder
but this is taking an absolute age. I read one of the answers on your site to a similar question to this and the suggestion was to
use peroxide. I have bought some 6% (20vol) hydrogen peroxide and just wonder if you can clarify exactly how I should use it? You
previously suggested mixing it with shampoo. Should this be done on dry or wet hair?
A: You will want to mix the peroxide with an equal measure of shampoo. So, take a small container (preferably one that you can seal
securely) and fill it half-way with the peroxide then fill it the rest of the way with shampoo. Use a non-medicated shampoo – not
anti-dandruff shampoo. Clarifying shampoo would be best. This is available at your beauty supply store and is excellent for use on
occasion for women who use a lot of hair styling products on their hair.
(As a side note: the anti-dandruff shampoo isn’t designed to clean the hair any better than
regular shampoos. It simply contains ingredients such as Selenium Sulfide to combat the fungus that causes dandruff.)
Blend the shampoo and peroxide together and use them as you would regular shampoo, but leave the
shampoo lather on the hair for 3-5 minutes. This should disperse the remainder of the semi-permanent color from the hair. Be aware,
however, that this process can lighten the natural color of your hair, so do not repeat this process more than necessary to remove the unwanted color tones.
It sounds to me as though the problem with the hair color residue came about because your hair may have
been overly porous when the color was initially applied. If your hair has been chemically treated before – either previous color
services or from perms or straighteners – it may have been damaged sufficiently that the color of the semi-permanent process
penetrated more deeply than was intended. Subsequent conditioning treatments could have then sealed the cuticle layer and “locked
in” the color, resulting in a more permanent tint than was anticipated.
This is just a theory, but should serve as a reminder that everything we do to our hair can have
a cumulative effect. When you are unsure, always try to err on the side of caution, or seek a professional’s guidance.