Re-dyeing Hair?
All hair color has peroxide developers that are nessacery for the color to lift (lighten) or deposit (darken) the color into your hair. Darkening isnt as damaging as lightning because the peroxide is a lower level. If your hair is mostly healthy now (not breaking...
Perming Dyed Hair?
as long as you get a perm for color treated hair you can perm as soon as 1 week.
Getting Hair Back to Natural Color?
I agree completely. No product can make your hair its natural color again.