Alkaline perms carry a pH in which range?

• A. 8.0-9.5
• B. 3.0-4.5
• C. 6.0-7.0
• D. 9.6-10.5

Answer: (A)

Alkaline perms rely on a basic environment to swell the hair and break disulfide bonds so the curls can be reformed. The pH must be high enough to activate this chemical change, and the typical professional alkaline perm solutions sit in the mid to high 8s up to about 9.5. That makes the range around 8.0–9.5 the correct choice, because it reflects the standard alkaline level needed for this process. The other ranges don’t fit: 3.0–4.5 is acidic and won’t swell or break bonds; 6.0–7.0 is neutral and won’t fully disrupt disulfide bonds; 9.6–10.5 is higher than the common range used in most perm formulations and isn’t the conventional standard described for alkaline perms.