What are the two major perm phases?

• A. Physical and chemical
• B. Physical and thermal
• C. Thermal and chemical
• D. Mechanical and chemical

Answer: (A)

The two major perm phases are physical and chemical. The physical phase involves shaping the hair by wrapping it around rods and forming the desired curl pattern through mechanical manipulation, which changes the hair’s form without altering its chemical structure. The chemical phase follows, where chemical agents break and then rebuild the hair’s internal bonds to set the new shape. Heat may be used to speed processing, but it isn’t a separate phase on its own. So pairing physical shaping with the chemical bond-reforming step best captures the essential progression of a perm.