Chemical services performed on hair with low porosity require a solution that is more what?

• A. More Acidic
• B. More Alkaline
• C. Neutral
• D. Highly Acidic

Answer: (B)

Low porosity hair has cuticle scales that lie very flat and resist moisture and chemical penetration. To perform chemical services effectively on this hair, a more alkaline solution is used because alkaline pH raises the cuticle and causes the fiber to swell slightly, allowing chemicals to penetrate to the cortex. Neutral or acidic solutions keep the cuticle closed or tighten it further, making penetration difficult and often leading to uneven results. So the best choice is a more alkaline environment to achieve the desired chemical action on low porosity hair.