What is the purpose of aluminum foil when highlight hair?

i am just about to put bleach blonde highlights in my hair it says dont add heat...does that mean to not use uliminum foil? ive heard that it creates heat...or is it just to seperate the hair?What is the purpose of aluminum foil when highlight hair?
it separates the hair so colors won't bleed into one another but check the foils periodically you may need to dampen hair with more bleach if it dries too much it will stop working. you only aplly heat if you want the color to lift more. But not too much.What is the purpose of aluminum foil when highlight hair?
No it means don't use a hair dryer. I foil my hair all the time to put in low lights. I prefer it actually because its more precise then the cap and gets closer to your roots. Foil is fine. Just don't use any external heat like a hair dryer. But if its not taking, like your hair is still an orangy color just apply heat for about 30 seconds. Heat makes the stuff work faster. Any time you go to a salon to get your hair colored or bleached they put you under the dryer to make it work faster. A little Heat doesn't hurt it or your hair it just quickens the process.
Pretty much what binka said. None of the other people that answered didn't even remotely answer your Q. lol. Your probably already know what the foils were for or you would not be asking about the heat thing. Also like binka said if your hair isn't taking the bleach well your can put heat on it for about 30 seconds. I go get my hair bleached all the time and they do put me under that dryer thing to speed up the process. It also makes it not so orangy looking if your hair just stops at that stage thats in between brown and blonde.
Foiling hair is a hair colouring technique used to separate sections, preventing different color formula's from mixing together. Using foils is an incredibly versatile method, allowing for unlimited creativity!





Because the sections of hair are kept separate, several colors can be applied in one process. And the freedom to choose the size of each highlighted strand makes it possible to create a very high-end looking, multi-tonal hair color.





It has nothing to do with heat.
Foils is used to separate the colored hair from the non colored hair.
Aluminum foil does not add heat. The most it can do is retain heat, but it can't add it.
it separates it from the other pieces of hair.


lol i love mine to be foiled instead of pulled threw


a cap.

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