Hey;
I came back to this thread because I noticed my own hair is only partially taking color- just oon the roots (so it looks like the hair growing out is lighter, when actually it is just the only part that took the dye!! It's not bad or significantly lighter, but it just looks like I dye my hair darker and my light roots are growing out! Weird.), so I did some online searching while waiting for a reply from Clairol (I emailed them asking why would this happen) and I found this on another message board in reply to someone who had the same problem:
Emeraldeyes, the roots take the color faster than the rest of the hair usually. I think your hair may be low porosity, but remember that color can't lift color. Your hair is a level 3, which is dark brown. You can remove the color with a color remover. If you have used several different colors on your hair in the past, it will build up and it will not hold another color. After you remove the old dyes from the hair, whatever color you use will penetrate the cortex of the hair better.
I don't know about you, Makeupwhore, but it definitely sounds like my new problem. I have used several dyes over the YEARS and although it's usually in the same color and tone, every now and then I try something a shade lghter or darker.
Sooo, now I'll try to remove all the old dye and re-dye. After a couple weeks, anyway. I just dyed last night. Don't want to shock the hair anymore than necessary.