Final answer:
The stylist should perform a strand test to assess hair condition before applying a relaxer to hair that has been previously damaged. This test determines if the hair can endure further chemical treatment or needs conditioning first.The correct option is D.
Step-by-step explanation:
If the hair is damaged by hot-comb straightening, tinting, or lightening, the stylist should perform a strand test to assess hair condition.
This is because the hair has undergone chemical processes that could have weakened its structure, potentially making it more susceptible to damage from further chemical treatments like relaxing
It is essential to avoid causing additional harm to the hair, so performing a strand test will reveal whether the hair can withstand another chemical process or if it requires conditioning treatments before proceeding.
Perms and relaxers involve the disruption and reformation of disulfide bonds within the hair through the use of chemicals.
A chemical relaxer, for instance, typically employs a reducing agent to break down these bonds, followed by an oxidant such as hydrogen peroxide to neutralize and set the new straightened form.
It is also important to note that hair lightening, often done with bleach, is a permanent change because it removes the natural pigment. Thus, assessing the condition of the hair beforehand is crucial to maintaining hair health and preventing breakage.The correct option is D.