The longer your keep the dye in, the more it will damage your hair. Follow the instructions, closely. ;)
yes
i don't see why not..
It won't take. Synthetic hair is made from acrylic or plastic.
Yes. It is possible.
It's okay. Having dark hair should not stop you from dieing it any darker or lighter.
Okay, you should not perm you hair right after you dye your hair because you will be damaging your hair even more and the damage you are causing on your hair already will be increased.
any age is okay, if you are young then parents should approves
You can dye your hair however you like, I don't think it would screw up your hair any way
I have dark hair but know hair pretty well. For example, my friend had blond hair and died it to brown. When you dye hair, the old color goes down to the end of your hair, so it will be lighter on the bottom. If you wash your hair the color will get lighter. If you dye your hair darker when it's light, your hair will be different shades and the dye usually doesn't stay in long. Also dying your hair that aggressively isn't healthy for your hair.
It really depends on the dye. Some dyes, like Manic Panic, are a vegetable based stain. As long as you cover your hair, you should be fine. Other hair dyes will fry your hair if they are left in longer than the suggested time. You will have to read the directions specific to your dye.
okay so you cant dye hair exstentions even if they are 'human' the reason for this is that there'll always be abit of synthetic fibre added in which cannot be dyed as it doesnt have the same properties as human hair
hair dye