What is the difference between semi permanent and permanent toner?

im guessing one is permanent and the other is not but wich should i choose between both. is there any harm with the permanent toner?What is the difference between semi permanent and permanent toner?
just like you said, the permanent is permanent and the semi permanent comes out of your hair. :] and no, there's no harmWhat is the difference between semi permanent and permanent toner?
Toner? You mean for when you bleach your hair? There's no harm in a permanent toner.

lebron james