Which type of relaxer does not require a neutralizer?

Hydroxide relaxers do not require a neutralizer because they work through a different chemical process compared to other relaxers. Unlike thio relaxers, which are classified as a type of perm and require a neutralizing agent to reform the hair structure, hydroxide relaxers break the disulfide bonds in the hair through an alkali process. This alteration of the hair's structure is permanent, meaning that once the hair has been relaxed with hydroxide relaxers, it does not need the same neutralizing step to stabilize it after the procedure.

Furthermore, hydroxide relaxers have a high pH, which effectively prevents the reformation of disulfide bonds, thus eliminating the need for a neutralizing step. This characteristic is essential for stylists to understand when choosing the appropriate relaxer for different hair types and textures, ensuring they achieve the desired results without damaging the hair or scalp.