Porosity is defined as the ability to absorb and retain what?

• A. Liquid
• B. Curl Pattern
• C. Color
• D. Texture

Answer: (A)

Porosity tests how much moisture the hair shaft can take in and hold onto. This depends on the cuticle layer: when the cuticle scales are raised or damaged (high porosity), hair soaks up water and other liquids quickly but can lose moisture just as fast. When the cuticle lies flatter (low porosity), absorption is slower, and moisture is kept longer. This idea is about moisture management in hair, not about curl pattern, color, or texture. So, porosity describes the ability to absorb and retain moisture, i.e., liquids.