Which base orientation is not recommended for alkaline perms?

Which base orientation is not recommended for alkaline perms?

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

Answer: (A)

Base orientation controls how much lift and curl you create at the scalp, and it also affects how the processing solution interacts with the hair and skin. Alkaline perms use a strong, highly alkaline solution that causes significant swelling of the hair. If you place the rod directly on the base at the scalp (on-base), that swelling and tension are concentrated right at the skin line, which can lead to overprocessing, scalp irritation, and an uneven or overly tight curl near the roots. Because of this risk, on-base is not the best choice for alkaline perms. Using placements that are half-off base, stand-off base, or underdirected reduces lift at the scalp, giving you a more controlled curl with less stress on the scalp. In short, the on-base orientation is avoided with alkaline perms to protect the scalp and achieve a predictable, safer result.

Base orientation controls how much lift and curl you create at the scalp, and it also affects how the processing solution interacts with the hair and skin. Alkaline perms use a strong, highly alkaline solution that causes significant swelling of the hair. If you place the rod directly on the base at the scalp (on-base), that swelling and tension are concentrated right at the skin line, which can lead to overprocessing, scalp irritation, and an uneven or overly tight curl near the roots. Because of this risk, on-base is not the best choice for alkaline perms. Using placements that are half-off base, stand-off base, or underdirected reduces lift at the scalp, giving you a more controlled curl with less stress on the scalp. In short, the on-base orientation is avoided with alkaline perms to protect the scalp and achieve a predictable, safer result.