What is the outcome of using a thermal pressing comb once on each side of the hair with medium pressure?

Using a thermal pressing comb once on each side of the hair with medium pressure typically results in the removal of 60 to 75% of the curl. This technique involves the application of heat and pressure to the hair, which allows the cuticle to become more pliable and straighten out some of the natural curl or wave.

The effectiveness of this method lies in its ability to temporarily alter the structure of the hair, leading to a significant reduction in curl while still maintaining some of the hair's natural texture. Complete straightening usually requires more than one pass or higher pressure, hence why a single pass with medium pressure does not define a full removal of curl.

This technique is often used for achieving a sleek look while still allowing for some body and movement within the hair. The partial curl removal allows for styling flexibility, which is ideal for various hairstyles without completely flattening the hair.