What is essential to do before applying the neutralizer in a perming process?

Before applying the neutralizer in a perming process, it is crucial to completely rinse the perm solution from the hair. The neutralizer works by stabilizing the new shape of the hair that has been altered by the perm solution. If any perm solution remains in the hair, it could continue to affect the hair structure and potentially lead to undesirable results or damage. Rinsing removes the chemical residue, ensuring that the neutralizer can effectively lock in the new curls or waves created by the perm. This step is vital for the integrity of the hairstyle and the overall health of the hair, as it prevents any reactions between the two chemicals that might compromise the perming results.