What is the purpose of a strand test before performing a chemical texture?

• A. To measure color shade.
• B. To check for scalp dermatitis.
• C. To evaluate porosity only.
• D. To determine how the hair will respond to processing, including elasticity and curl formation.

Answer: (D)

A strand test is used to predict how the hair will respond to chemical processing. By testing a small section, you can observe how the hair behaves when the chemical is applied—how it swells, how well its elasticity holds, and what curl pattern or texture results after a set processing time. This information lets you adjust processing time and strength to achieve the desired texture while minimizing damage, especially for hair with varying porosity or elasticity. Color shade checks or scalp checks aren’t what this test is designed for, and focusing only on porosity doesn’t capture how the hair will actually react during processing. The strand test provides the most complete preview of the hair’s response, including elasticity and curl formation.