Which test is used to check elasticity prior to processing during a relaxer?

• A. Pull test
• B. Scratch test
• C. Bend test
• D. Tension test

Answer: (A)

Elasticity is how far a hair strand can be stretched under tension and still return to its original length. Before applying a relaxer, you want to know if the strand has enough elasticity to handle chemical processing without snapping. The pull test does this by taking a small section of damp hair and applying light tension to see how much it stretches and whether it springs back. If it stretches and rebounds, the hair has good elasticity and is more likely to tolerate the relaxer. If it breaks or doesn’t recover, elasticity is poor, indicating a higher risk of damage from processing and suggesting adjustments or avoiding the treatment. The scratch test measures surface porosity, the bend test relates more to pliability and curl behavior, and the tension test isn’t the standard quick check used in a salon before relaxing. So the pull test is the most appropriate method for assessing elasticity prior to processing.