What does the pre-wrap solution used before a perm help to ensure?

The pre-wrap solution used before a perm is designed to equalize hair porosity and protect the hair. This step is crucial because hair can have varying levels of porosity, which affects how it absorbs chemicals used in the perming process. By applying a solution that equalizes porosity, each strand of hair is treated more uniformly, leading to consistent results throughout the perm.

Additionally, this protective measure helps minimize potential damage to the hair during the chemical treatment. It creates a more balanced base for the perming solution to work effectively, ensuring that the curls form evenly and maintaining the integrity of the hair. This foundational step is essential for achieving the desired outcome while preserving hair health.