What is a common characteristic of alkaline perms?

Alkaline perms are known specifically for their ability to create tight curls. The process involves using a higher pH (alkaline) solution, which allows for deeper penetration into the hair shaft. This is essential for reshaping the hair's bonds effectively to achieve well-defined curls. Because of the higher pH, the hair cuticle is opened wider, making it easier for the perm solution to work.

This characteristic of forming tight curls is particularly advantageous for clients who desire a more dramatic curl pattern. Such perms often have shorter processing times compared to other types, as the alkaline formula effectively breaks down the disulfide bonds in the hair quickly, allowing for a more significant curl formation.

Other options touch on aspects of perm applications but do not accurately describe the primary characteristic of alkaline perms in terms of curl formation and result.