Do a patch test 48 hours before application.
Mix the colorant and developer in the applicator bottle.
Apply evenly to dry, unwashed hair, starting from the roots.
Leave on for 25–30 minutes (longer for stubborn grays).
Rinse thoroughly with lukewarm water until water runs clear.
Apply the included nourishing conditioner, leave for 2–3 minutes, then rinse.
Dry and style your hair as usual.