If the hair color accepts easily, it has:

• A. Low porosity
• B. Average porosity
• C. High porosity
• D. Extreme porosity

Answer: (B)

Porosity describes how easily hair accepts moisture and chemicals during a color service. Hair with average porosity has cuticle scales that are neither too tight nor too loose, so color molecules penetrate at a normal, steady rate. This means the hair “accepts easily” in the sense that processing times and results are predictable and even. If porosity were too low, the hair would resist color and take longer to develop; if porosity were too high, color would penetrate quickly—often unevenly and with more risk of fading. So, easily accepting color aligns with average porosity.