What factors determine processing time and relaxer strength?

• A. Texture, elasticity and porosity
• B. Hair color
• C. Hair length
• D. Scalp oil

Answer: (A)

Processing time and relaxer strength hinge on how the hair accepts the chemical treatment. The key factors to consider are texture, elasticity, and porosity. Coarser texture has more resistance to chemical penetration, so it typically needs a longer processing time and often a stronger relaxer to achieve the desired straightening. Finer texture reacts more quickly, so processing time is shorter and the product can be milder to avoid over-processing. Elasticity indicates how well hair can withstand chemical changes without breaking; healthier, more elastic hair can tolerate longer processing, but signs of damage should guide any adjustments. Porosity shows how easily the cuticle opens to chemicals; high-porosity hair absorbs product quickly and is prone to over-processing, while low-porosity hair resists penetration and may require more time or a different approach. These factors together determine the right balance between processing time and relaxer strength to achieve smooth results while protecting hair integrity. Hair color, length, or scalp oil don’t directly set processing time or relaxer strength, though they can influence application technique or product choice in practice.