Erdmanns process, which persists to this day, comes in three straightforward phases. Enter a hair salon today and youll find that the chemical augmentation of your locks is referred to not as dyeing, but as colour correction. It takes 30 minutes to an hour for the necessary chemical reactions to run their course. The change is permanent  until your hair grows and your roots reveal your natural shade once again. First, the hair is soaked in ammonia, opening up the protective layers of protein.
Hair repairs is exempt from prosecution.
( z0 exempt :ARG1 ( z1 repair :ARG1 ( z2 hair ) ) :ARG2 ( z3 prosecute ) )
(z0 / exempt-01
    :ARG1 (z1 / repair-01
              :ARG1 (z2 / hair))
    :ARG2 (z3 / prosecute-01))
Hair repairs is exempt from prosecution .
z1 :ARG1 z2
z0 :ARG1 z1
z0 :ARG2 z3