Description-Protects hair fiber during exposure time for minimal hair breakage-Lightens natural dark hair and pre-colored bases-Perfect for off-scalp paper foil applications and free hand coloring techniquesMODE OF USEApply to dry and unwashed hair.Do not apply to scalp (wicks).Apply to previously studied hair so as not to damage it if it is previously discoloredExposure time 20-60 minutesNo additional heat required.Monitor the exposure process.