What is the pH level range for sodium hydroxide relaxers?

Sodium hydroxide relaxers, also known as lye relaxers, are highly alkaline and typically have a pH level that ranges from 11.5 to 14. This high pH level is crucial because it allows for the effective breakage of the disulfide bonds in the hair structure, making it possible for the hair to be straightened. The strong alkalinity works to swell the hair shaft, enabling the chemical process to penetrate the cuticle layer effectively.

Understanding this pH range is important for professionals in hairstyling, as it indicates how aggressive the relaxer will be on the hair and scalp. Using sodium hydroxide relaxers requires special caution and knowledge about pH levels to ensure that the product is applied safely and effectively, minimizing damage while achieving the desired straightening results.