Texas Cosmetology License Practice Exam

An acid wave uses an acid-based formula to reduce the swelling of the hair shaft, resulting in a tighter curl. A spiral technique is a specific way to wrap the hair around a curling rod, but it does not necessarily cause the hair to swell during processing. Croguiqnole, or croquignole, is not a known technique for hair processing. The correct technique that causes the hair to swell during processing is an alkaline wave. This is because alkaline waves use an alkaline-based formula which causes the hair cuticle to swell and open, allowing the waving solution to penetrate and change the structure of the hair. Therefore, the correct answer to this question is B Alkaline Wave.