What best describes the purpose of neutralization in chemical waving?

• A. Deactivates waving solution and rebuilds disulfide bonds
• B. Only deactivates waving solution
• C. Only rebuilds disulfide bonds
• D. Permanently changes hair color

Answer: (A)

Neutralization in chemical waving serves two essential jobs: it stops the waving solution from processing further and it re-formulates the hair’s disulfide bonds to lock in the new shape. During waving, a reducing agent breaks the hair’s disulfide bonds so the strands can take on a new configuration around the perm rods. The neutralizer then oxidizes those bonds again, rebuilding them in the new arrangement to set the curl. This step also helps bring the pH back toward normal and stabilizes the texture. So the best description is that neutralization deactivates the waving solution and rebuilds disulfide bonds. It’s not just about deactivating the solution, not only about rebuilding bonds, and it does not permanently change hair color.