I high lighted my own dark brown hair with blonde highlights, using "Revlon - Frost and Glow". It turned out awesome. But, now it's been a few months. I can't find any information anywhere about how to touch up your roots. The kit instruction insert does not explain how to do this either.
I did end up getting another kit and pulling my hair through exactly like the last time. It didn't turn out quite as nice as the first time, but I can live with it. I still get compliments. What I have noticed is, obviously, my hair is twice as blonde and the dark roots remain on the strands that were not caught and pulled through the second application.
I can't do this a third time, I will be completely blonde. As I've mentioned, my hair is very dark brown, quite long to the middle of my back and naturally curly. Don't ask how I was able to use a cap, but I don't have a problem. Any advice for root touch up when highlights were initially applied with a cap. I can't afford to go to a salon and do not have an extra hand readily available to assist. Thanks
By She Drags
I do the same thing with my hair since I have so much gray. I keep the roots retouched with light brown and the rest is a golden blonde which looks great. I do it myself with a toothbrush barely on the roots and I only leave it on 20 minutes so it looks natural.
I've been doing my hair for over 30 years, and unfortunately, this is how it works. There is no way to find all of the original hair strands to lighten their roots. It's pretty much the same when going to a hairdresser, except when you have your hair foiled, it is much more noticeable. I do prefer pulling my hair through a cap rather than getting it foiled. I try not to pull large clumps of hair through, making it much less noticeable, but the hair ends do get lighter.
According to "The Encyclopedia of Hair Coloring by Clairol" it has a small section entitled: "When Retouching".
Retouch about every 2-3 months, avoiding strands that have already been lightened. If any pre-lightened strands are selected, apply mixture to new growth only. DO about half as many strands as previously done to prevent overall blonding.
Instead of taking a risk and trying to do this yourself, why not look in the yellow pages under cosmetology/beauty schools and call for an appointment and have one of the students do it for you. The beauty schools charge no where near the price of what a professional hair salon would charge.
Licensed Cosmetologist
When I highlighted my hair, I didn't worry about roots. Obviously, highlights are artificial, so I just let them be. I re-highlighted with Frost and Glow every few months. However, I have lighter brown hair, and it was relatively short, so perhaps the contrast in yours makes it more noticeable.
If you've used a cap for high lighting and want to touch up your roots using a cap, make sure your hair is parted the way you usually style it and simply place the cap on your head as you would normally, the only difference is you will not pull the entire strand of hair out. Depending on the growth of your roots will depend on how far you pull each strand. Use the hook and poke through the hole on the cap and start slowly pulling the strand of hair through the cap.