When processing lotion is applied and breaks the disulfide bonds it ___________ protein structure and allows protein chains to shift and assume ___________ of perm rod.

When processing lotion is applied and breaks the disulfide bonds it ___________ protein structure and allows protein chains to shift and assume ___________ of perm rod.

• A. Softens, shape
• B. Hardens, length
• C. Dissolves, curls
• D. Rebuilds, angle

Answer: (A)

Processing lotion acts as a reducing agent that breaks the disulfide bonds in hair keratin. This breaks cross-links and softens the protein structure, making the hair pliable. With that flexibility, the protein chains can slide and rearrange to fit the shape of the perm rod. So the best completion is that it softens the protein structure and lets the chains assume the rod’s shape. After processing, the neutralizer later re-forms bonds in the new arrangement to lock in the curl.

Processing lotion acts as a reducing agent that breaks the disulfide bonds in hair keratin. This breaks cross-links and softens the protein structure, making the hair pliable. With that flexibility, the protein chains can slide and rearrange to fit the shape of the perm rod. So the best completion is that it softens the protein structure and lets the chains assume the rod’s shape. After processing, the neutralizer later re-forms bonds in the new arrangement to lock in the curl.