What aspect of hair is important to analyze for color treatment?

When preparing for color treatment, analyzing the porosity of hair is crucial. Porosity refers to the hair's ability to absorb and retain moisture and chemicals, which directly affects how it will take on color. High porosity hair, for example, tends to absorb color quickly but may also lose it more rapidly due to its damaged cuticle layers. On the other hand, low porosity hair resists moisture and chemical penetration, making it necessary to use specific techniques to ensure even color absorption.

Understanding porosity helps hair professionals select the appropriate products and techniques for achieving the desired results while minimizing damage. It’s a key factor in customizing hair color services to suit individual hair types and conditions.