Describe the 2X base in perm design.

Describe the 2X base in perm design.

• A. Measured with two full diameters of the rod, produces a looser curl, reduces lift, more hair wrapped
• B. Measured with one full diameter of the rod, produces a tight curl
• C. Measured with three full diameters of the rod, increases lift
• D. Measured with two halves of a diameter, increases lift

Answer: (A)

In perm design, base size describes how much hair sits on the rod at the scalp, measured in rod diameters. A 2X base means the base length is two full diameters of the rod. This longer base spreads the hair over a longer arc on the rod, so the curl formed is less curved—producing a looser curl. Because more of the hair is wrapped along the rod rather than lifted away from the scalp, lift is reduced. In short, two full diameters of base give a looser curl, less root lift, and more hair wrapped around the rod.

In perm design, base size describes how much hair sits on the rod at the scalp, measured in rod diameters. A 2X base means the base length is two full diameters of the rod. This longer base spreads the hair over a longer arc on the rod, so the curl formed is less curved—producing a looser curl. Because more of the hair is wrapped along the rod rather than lifted away from the scalp, lift is reduced. In short, two full diameters of base give a looser curl, less root lift, and more hair wrapped around the rod.