Before a chemical relaxer, what is NOT necessary to evaluate about the hair?

When preparing to apply a chemical relaxer, it's crucial to assess several factors about the hair to ensure that the treatment will be effective and safe. Evaluating color, texture, porosity, and elasticity all provide essential information about the hair's condition and properties, but color is not a necessary factor in this context.

Color refers to the visible hue of the hair and does not significantly impact the hair's response to a chemical relaxer. The critical aspects to focus on include texture (which can determine how coarse or fine the hair is), porosity (which affects how well the hair can absorb products), and elasticity (which gauges the hair's strength and ability to return to its original shape after being stretched). By concentrating on these attributes, a stylist can make informed decisions about the relaxer strength to use and whether the hair is in suitable condition for the chemical process.