Delaware Cosmetology and Barbering Practice Exam

What is the key characteristic of an acid-based perm?

1. It is strong and aggressive

2. It has no odor

3. It is milder and more suitable for fine or damaged hair

4. It is fast-acting

The correct answer is: It is milder and more suitable for fine or damaged hair

The key characteristic of an acid-based perm lies in its formulation and the manner in which it interacts with the hair structure. Acid-based perms work at a lower pH level, generally between 6.9 and 7.2, which results in a milder and gentler processing. This makes them particularly suitable for fine or damaged hair types, as they are less aggressive and more forgiving on fragile strands, allowing for a beautiful curl formation without compromising the integrity of the hair. The slower and more controlled process also means that the risk of excess damage is minimized, making it a preferred choice for clients with delicate hair. Acid-based perms tend to have a less intense odor, but that is not their defining characteristic; the strength and suitability for hair types are what distinguish them from other perm types. While they may act more slowly in some contexts, the emphasis on being milder and better for sensitive hair types is the most significant aspect of acid-based perms in comparison to other perm options.