What are the two most common types of relaxers used in barbershops?

The two most common types of relaxers used in barbershops are thio and hydroxide relaxers.

Thio relaxers, which use thioglycolic acid as their active ingredient, are widely favored because they are effective on a variety of hair types, particularly those that are fine to medium. They break down the disulfide bonds in the hair structure, allowing curls to loosen or straighten the hair. This type of relaxer is known for its less harsh effects compared to some other chemical straightening methods, making it a popular choice in barbershops where a gentler approach is sometimes necessary.

Hydroxide relaxers, on the other hand, are stronger and are typically used for more resistant hair. They work by breaking down the hair's protein structure with sodium hydroxide or guanidine hydroxide, and they completely relax curls. This type of relaxer can deliver more dramatic results but requires careful application and consideration of the hair's condition due to its potency.

In contrast, while cream and gel relaxers may be effective, they do not represent the most common types used in professional settings. Similarly, although liquid and solid relaxers imply a classification of products, they do not accurately describe the primary types of chemical