Ok I need help I used to go to school for hair coloring but that was 7+ years ago and my friend wants me to foil blond in her brown hair but she wants cunks can you help me? I don't member how to foil hair color??

If you don't know how to do it then let her get it done from a professional.

But usually it is where the bleach/colour is applied, then foil is wrapped around it to stop it from getting onto other sections of the hair and also foil is a good heat conductor which speeds up the colouring process.

If you're not sure, I wouldn't do it. Not saying you're stupid or anything, but I would tell your friend to go to a local salon and get it done there.