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.
Erdmanns process is something that can be perpetuated.
( z0 possible :ARG1 ( z1 perpetuate :ARG1 ( z2 process :ARG0 ( z3 person :name ( z4 name :op "Egypt" ) ) ) ) )
(z0 / possible-01
    :ARG1 (z1 / perpetuate-01
              :ARG1 (z2 / process-02
                        :ARG0 (z3 / person
                                  :name (z4 / name
                                            :op1 "Egypt")))))
Erdmanns process is something that can be perpetuated .
z3 :name z4
z4 :op1 0
z2 :ARG0 z3
z0 :ARG1 z1
z1 :ARG1 z2