Dr.George wrote:L'Oreal Color Zap is a bleach. It works fairly well. Personally, I prefer ColorFix (a reducing agent -- opposite of bleach) because it's easier on the hair. Color Oops does the same thing. I have heard many people say that they've had success with Color Zap.
The hair has to get to a shade lighter than the shade you want your hair to be before you recolor it. It doesn't particularly matter what color it ends up as before you color it -- just so long as it's at least slightly lighter than the shade you're going to dye it.
To answer your last question, chemically treated hair does become porous and porous hair will "grab" (absorb strongly) hair coloring. If you use a brown dye, it may appear black. For that reason, it's generally recommended to use a dye one or two shades lighter than your target color. You also have to be prepared for dye fading because porous hair not only grabs color, it also doesn't hold onto it very well.
The last possibility is that people who use ColorFix or Color Oops have to make sure they wash all of the dye out of the hair. ColorFix dissolves the color so it can be washed out. It doesn't try to bleach it lighter. If any of the dye is left in the hair, it will re-oxidize and turn black. That's why the last step of the ColorFix process is to use a "lotion" (it's actually a weak hydrogen peroxide solution) to make sure that all of the dye is out of the hair. If it is all out, the hair will stay whatever color it turned. Otherwise, it will turn black.
I know people who've had trouble with color removers. Often, they use ColorFix two or three times to get all of the dye out -- especially with black dye. I'm not sure what Color Zap will work. Once you use Color Zap or any other bleach, trying to use ColorFix or Color Oops won't work. Bleach will over-oxidize the artificial pigment and ColorFix won't reduce it to a soluble. form. You can use ColorFix once or twice and if it doesn't work as you'd like it, you can use Color Zap or any hair bleach.
Users browsing this forum: No registered users and 0 guests