After applying a relaxer, a periodic strand test is performed to determine what?

• A. Processing time
• B. Curl pattern
• C. Scalp sensitivity
• D. Porosity

Answer: (A)

During a relaxer, you want to stop processing as soon as the hair has reached the desired level of straightening without over-processing. Hair on different strands can respond at different rates, so a periodic strand test is used to check how far the chemical has progressed. By taking a small section and inspecting it at intervals, you determine whether more processing time is needed or if you should stop. This directly guides the processing time to achieve the right result safely. The test isn’t about judging the final curl pattern after processing, assessing scalp irritation during the application, or evaluating porosity, which are addressed by different checks or tests.