Which type of permanent wave generates its own heat and is processed without an external heat source?

Which type of permanent wave generates its own heat and is processed without an external heat source?

• A. Neutral Perms
• B. Endothermic Perms
• C. Exothermic Perms
• D. Acid Perms

Answer: (C)

Permanent waves that generate their own heat rely on an exothermic chemical reaction. In this type, the waving lotion and activator interact in a way that releases heat as they process, warming the hair from within and speeding up the chemical changes needed to curl the hair. This self-heating means no external heat source is required, unlike endothermic perms which need outside heat. Acid and neutral perms are defined more by formulation and pH than by heat generation, so they don’t inherently rely on self-heating.

Permanent waves that generate their own heat rely on an exothermic chemical reaction. In this type, the waving lotion and activator interact in a way that releases heat as they process, warming the hair from within and speeding up the chemical changes needed to curl the hair. This self-heating means no external heat source is required, unlike endothermic perms which need outside heat. Acid and neutral perms are defined more by formulation and pH than by heat generation, so they don’t inherently rely on self-heating.