Illinois Cosmetology Practice Exam 2025 - Free Cosmetology Practice Questions and Study Guide

Fine hair is generally more delicate and susceptible to damage from heat than other hair types. This means that using a lower temperature setting on a flat iron is essential to prevent issues such as breakage, dryness, and split ends. Fine hair often lacks the thicker cuticle layer that provides protection against heat, making it important to use tools that operate at lower temperatures to maintain hair health while achieving desired styling results.

Thick and coarse hair types often require higher heat settings because they can withstand greater temperatures and respond better to the styling effects of heat. Medium hair typically falls between the two extremes and may need a moderate temperature, but it still does not necessitate the more cautious approach required for fine hair. Understanding the differences in hair structure and how they relate to heat application are critical for effective hair styling and maintaining the overall health of the hair.