Final answer:
The strand test is performed during a chemical relaxer procedure to determine when the hair is adequately relaxed and to prevent over-processing.
The Correct Option is; C) The strand test.
Step-by-step explanation:
During a chemical relaxer procedure, the correct test to perform to determine when the hair is sufficiently relaxed or if additional smoothing is needed is C) The strand test. This test involves applying the chemical relaxer to a small section of hair and observing the effect.
When the hair has reached the desired level of straightness, the reaction is stopped to prevent over-processing and damage. This is crucial as leaving the relaxer on for too long can lead to hair breakage, loss of elasticity, and scalp irritation.
Neither porosity, elasticity, nor density tests are appropriate for determining the progress of the chemical relaxer's straightening process.
The test that should be performed during a chemical relaxer procedure to determine whether the hair is relaxed enough or additional smoothing is required is the strand test.
During a strand test, a small section of hair is treated with the relaxer product and monitored for the desired level of relaxation. This allows the stylist to assess the effectiveness of the relaxer and make any necessary adjustments.