NIC Barber Written (Theory) ExamHair Care ServicesHard
A barber is preparing for a permanent waving service. After shampooing, the client's hair is towel-dried and wrapped onto perm rods. The hair appears to be overly porous and has a tendency to frizz. Which type of permanent waving solution would be most appropriate for this client?
- AExothermic waves
- BTrue acid waves
- CAlkaline (cold) waves
- DAcid-balanced waves
Show answer & explanationAnswer & explanation
Correct answer: D. Acid-balanced waves
Overly porous hair, which tends to frizz, requires a gentler waving solution. Acid-balanced waves have a pH between 7.8 and 8.2, making them gentler than alkaline or true acid waves, and are suitable for porous or color-treated hair, minimizing frizz and damage.
Why the other options are wrong
- A. Exothermic waves are also generally alkaline and produce their own heat, which can be too harsh for porous hair.
- B. True acid waves (pH 4.5-7.0) are very gentle but require external heat and often result in a weaker curl, not ideal for a potentially frizzy outcome.
- C. Alkaline (cold) waves are highly alkaline (pH 9.0-9.6) and too strong for overly porous hair, leading to damage and frizz.
Permanent Wave Solution Selection for Porous Hair
Choosing the correct permanent waving solution based on hair porosity and condition to achieve desired curl and minimize damage or frizz.
- Porous hair absorbs solutions quickly and is prone to damage.
- Acid-balanced waves are gentler and ideal for porous, color-treated, or delicate hair.
- Alkaline waves are stronger and best for resistant, coarse hair.
Memory trick: Porous hair needs a gentle, balanced acid wave.