Chemical services performed on hair with low porosity require a solution that is:

For hair with low porosity, the cuticle layers are tightly packed and resistant to moisture and chemical penetration. This means that chemical services applied to low porosity hair require a more alkaline solution. An alkaline solution opens up the hair cuticles, allowing for better penetration of the chemicals used in processes like coloring, perming, or chemical relaxing.

Using a more alkaline solution facilitates the chemical reactions necessary for these services, ensuring that the product adequately saturates the hair. If an acidic solution were used instead, it would not effectively penetrate the tightly packed cuticles, leading to less satisfactory results. Therefore, an alkaline solution is essential for achieving the desired effects on low porosity hair.