Abstract: A hair treatment device for use in the application of direct heat to foil-covered sections of hair, in order to accelerate a hair highlighting or hair coloring process, is described. The hair treatment device includes two opposing plates for transmitting heat. The foil-covered sections of hair are pressed between the opposing plates when the device is in use. The plates are set in a housing. Seals are located along edges of the plates, edges of the housing, or both, in order to protect the user's scalp from the heated plates. A plurality of venting passages pass through the plates.