Modern acid waves are actually _____ waves, which have a 7.0 or neutral pH.

• A. Alkaline
• B. Acid-balanced
• C. Acidic
• D. Neutral

Answer: (B)

Modern acid waves are formulated to run at a balanced, near-neutral pH, around 7.0. In cosmetology, calling these products “acid-balanced” communicates that their pH is carefully adjusted to be neutral rather than strongly acidic or strongly alkaline. This balanced pH helps reduce damage while still enabling the chemical reaction needed to set the curl.

If a wave were alkaline, it would have a pH above 7 and tend to be harsher on the hair; if it were acidic, the pH would be below 7 and could be more drying or stiffening. Simply labeling something as neutral isn’t the standard product descriptor in this context, whereas “acid-balanced” captures the intended, pH-managed formulation of modern acid waves.