What is the pH range for sodium hydroxide relaxers?

Sodium hydroxide relaxers typically have a pH range between 10.5 and 14. This high pH level is essential because sodium hydroxide is a strong alkaline substance, which works by breaking the disulfide bonds in the hair, allowing it to be reshaped and relaxed. The alkalinity facilitates the covering of hair cuticles and the alteration of hair structure necessary for the desired straightening effect.

Most other relaxers do not require such a high pH to achieve their effects. For instance, products with pH values in the lower ranges are generally less effective for the same purposes, as they do not provide sufficient opening of the cuticle or disruption of the disulfide bonds. Understanding the pH range of sodium hydroxide relaxers is crucial for correctly using these products and ensuring effective results in hair smoothing and straightening.