Carbon greatly improves effectiveness on light-colored hair. Dye channels photon energy to the hair follicle. Improves results up to 800% over regular laser or IPL epilation. Brought to you by the leader in professional cosmetology equipment and supplies. Additional Details ------------------------------ Product description: Carbon greatly improves effectiveness on light-colored hair. Dye channels photon energy to the hair follicle. Improves results up to 800% over regular laser or IPL epilation. Brought to you by the leader in professional cosmetology equipment and supplies.