Do a patch test 48 hours before application.
Mix the colorant and developer in the bottle provided.
Apply to dry, unwashed hair, starting at the roots and working toward the ends.
Leave on for 25 minutes (or 30 minutes for gray hair).
Rinse hair thoroughly until water runs clear.
Apply the after-color conditioner, leave for a few minutes, then rinse again.
Dry and style as desired.