Barber State Board Practice Exam 2025 – Your All-in-One Guide to Exam Success!

The hair color product that enters the cortex and forms tint molecules that are permanently trapped is associated with permanent hair color. Permanent hair color works by penetrating the hair shaft and opening the cuticle layer to deposit color into the cortex, where it forms large tint molecules. These molecules are unable to escape, which leads to a long-lasting change in hair color.

In contrast, temporary hair color products only coat the hair's surface, leading to color that can be easily washed out. Semi-permanent colors can penetrate the cuticle but typically do not enter the cortex deeply, resulting in a color that will gradually fade over time with shampooing. The term "frosted" does not pertain to a specific classification of hair color products but rather describes a technique or style.

Therefore, the characteristic of permanent hair color—its ability to enter the cortex and form lasting color—makes it the correct answer in this context.