Which base positioning is achieved by resting a 1X base rod directly between the upper and lower partings?

• A. Half-off base
• B. On-base
• C. Underdirected
• D. Overdirected

Answer: (B)

On-base placement means the base of the rod sits directly on the scalp between the upper and lower partings. This positioning locks the curl onto the base, giving the strongest lift and the tightest root direction because the hair wraps around the rod with the scalp-side base supporting it. Resting a 1X base rod between the partings places it right on the base, producing maximum base contact and thus the most lift. If the rod were off the base or only half on, the scalp contact would be reduced, resulting in a softer lift and looser curl.