Why does aluminium foil heat up at hair dresser during hilights?

Answer 1

aluminum foil is .0007 inches thick, so it takes it a couple of seconds before it cools down. that's why its not hot when u take it out of the oven..hope that helps

Answer 2

Aluminum foil heats up during highlights at the hair salon because it is a good conductor of heat. When placed in close contact with the hair and the coloring chemicals, the foil helps to speed up the chemical reaction that lightens the hair. The heat generated by the foil helps to open up the hair cuticle, allowing the bleach or color to penetrate more effectively.