Which hair property affects processing time in chemical texturizing?

• A. Porosity of the hair
• B. Hair density
• C. Hair color
• D. Curl pattern

Answer: (A)

Porosity describes how readily hair accepts moisture and chemicals. In chemical texturizing, processing time depends on how quickly the chemical can penetrate the cortex. Hair with high porosity has lifted or damaged cuticles, so chemicals enter faster and you’ll need a shorter processing time to avoid over-processing. Hair with low porosity has tighter cuticles, making penetration slower, so a longer processing time is needed to reach the desired result. That direct influence on how fast the chemical works is why porosity is the factor that affects processing time. Hair density, color, and curl pattern don’t change the rate of chemical penetration as predictably.