What environmental factors can affect the outcome of a perm?

Humidity and temperature levels are critical environmental factors that significantly affect the outcome of a perm. Humidity can alter the hair's moisture content and curl retention; high humidity can cause the hair to swell and lose its curl definition, while low humidity can lead to a lack of moisture, possibly resulting in frizzy or undefined curls. Temperature plays a role in both the processing of the perm solution and how effectively the hair bonds to the new shape. Warmer temperatures can accelerate the perming process, while colder conditions might inhibit the effectiveness of the chemical reactions involved in setting the curls. Therefore, understanding and controlling these environmental factors is essential for achieving the desired results when applying a perm.