What is a risk of using high volume developer on porosity hair and how can you mitigate it?

• A. Overprocessing and damage; mitigate by strand testing, using lower volume, and shorter processing times.
• B. Dandruff buildup; mitigate by using clarifying shampoo.
• C. Fading color quickly; mitigate by using sealant conditioner.
• D. Increased scalp sensitivity; mitigate by avoiding any testing.

Answer: (A)

High-volume developer speeds up chemical processing, and porous hair already drinks in chemicals quickly. That combination means the hair can lift more than intended and the cortex can be weakened or damaged, leading to breakage, frizziness, and an uneven result. To keep this from happening, you start with a strand test to see how much lift the hair actually achieves and how it responds, then opt for a lower-volume developer, and shorten the processing time accordingly. Processing in shorter stages or checking frequently during the processing helps you stop before damage occurs, and finishing with a careful conditioning plan helps restore moisture and strength.

Other concerns mentioned in the choices aren’t the primary risk here—dandruff deals with scalp condition, fading color relates to longevity of the dye or bleach rather than immediate mechanical damage, and while some sensitivity can occur, the safest approach is to test and monitor rather than skip testing.