Perms that cause minimal swelling and must be wrapped with firm, even tension are

Perms that cause minimal swelling and must be wrapped with firm, even tension are

• A. Acid
• B. Alkaline
• C. Neutral
• D. Sulfate

Answer: (A)

Understanding how pH affects swelling and wrapping is key here. Acid perms use a milder, lower-pH solution, which causes less swelling of the hair during processing. Because the hair doesn’t swell as much, the stylist must wrap with firm, even tension to keep the curl uniform and the processing consistent. Alkaline perms, with a higher pH, tend to swell more and can be less predictable if tension isn’t tightly controlled. Neutral perms sit between acid and alkaline but don’t emphasize the minimal swelling property as strongly as acid perms, and sulfate is not a perm solution at all. So the description fits acid perms: they minimize swelling and require firm, even wrapping.

Understanding how pH affects swelling and wrapping is key here. Acid perms use a milder, lower-pH solution, which causes less swelling of the hair during processing. Because the hair doesn’t swell as much, the stylist must wrap with firm, even tension to keep the curl uniform and the processing consistent. Alkaline perms, with a higher pH, tend to swell more and can be less predictable if tension isn’t tightly controlled. Neutral perms sit between acid and alkaline but don’t emphasize the minimal swelling property as strongly as acid perms, and sulfate is not a perm solution at all. So the description fits acid perms: they minimize swelling and require firm, even wrapping.