Which action creates the small curls during the elasticity test?

Which action creates the small curls during the elasticity test?

• A. Rapidly twisting the strand between thumb and index finger
• B. Running the distance of the hair rapidly using the thumbnail and index finger to create a series of small curls
• C. Using a curling iron
• D. Wetting the strand and shaking it

Answer: (B)

During the elasticity test, you want to see how the hair responds to being manipulated along its length. The action that produces visible small curls is when you run the strand rapidly along its length between the thumb and index finger. This quick, longitudinal motion makes the hair bend and form a series of tiny curls, giving a clear visual cue of the hair’s pliability and how it might behave under chemical processing. Twisting the strand, using heat, or wetting and shaking won’t reveal that same micro-curl behavior that shows elasticity.

During the elasticity test, you want to see how the hair responds to being manipulated along its length. The action that produces visible small curls is when you run the strand rapidly along its length between the thumb and index finger. This quick, longitudinal motion makes the hair bend and form a series of tiny curls, giving a clear visual cue of the hair’s pliability and how it might behave under chemical processing. Twisting the strand, using heat, or wetting and shaking won’t reveal that same micro-curl behavior that shows elasticity.