Why does the base area lighten faster when using a midstrand-to-ends then base (lighter result) technique?

• A. Increased product concentration at the base
• B. Additional body-heat at the base area
• C. Longer processing time at the base
• D. Lower porosity at the base area

Answer: (B)

Lightening agents oxidize faster when they are warmer, so temperature directly speeds up the lifting process. The base area near the scalp is warmer because of body heat, which accelerates the chemical reaction of the lightener there. In a midstrand-to-ends then base technique, the mids and ends are cooler and lift more slowly, while the base is exposed to that extra heat from the scalp, causing it to lighten faster and appear lighter. It isn’t about more product, longer processing time, or porosity—it's the additional body heat at the base driving the faster lightening.