Which type of neutralizer is commonly used after a perm?

The commonly used neutralizer after a perm is a protein-based neutralizer. This type of neutralizer is essential because it helps to stabilize the hair's new shape created by the perming process. A protein-based neutralizer works by penetrating the hair shaft and forming strong bonds to secure the curls or waves, ensuring that the new style holds effectively over time.

Protein-based neutralizers often contain ingredients that not only help in bonding but also contribute to hair health by providing a dose of essential proteins. This fortification is crucial after the chemical process of perming, which can leave the hair in need of reinforcement and moisture.

While hydrogen peroxide is used in some chemical processes for oxidation, it is not the primary neutralizer for perms, as its role is different. Rinsing conditioners and silicone sealers serve other purposes in hair care, such as providing moisture and shine, but they do not fulfill the specific function of stabilizing the curl structure formed by the perm. Thus, the protein-based neutralizer is the most appropriate and effective choice for achieving long-lasting and healthy curls post-perm.