Florida Cosmetology License Practice Exam

Demi-permanent hair color is characterized by its formulation, which typically lacks ammonia, making it less harsh on the hair compared to permanent hair color. This absence of ammonia allows for a more gentle application process that minimizes damage to the hair shaft. Additionally, demi-permanent color penetrates the hair cuticle and partially deposits color, providing a more subtle change that can enhance natural hair color or cover grays without the commitment of a permanent color.

In contrast, permanent hair color includes ammonia and other strong ingredients that enable it to penetrate deeper into the hair structure, leading to a lasting change in color. This higher level of processing can lead to more significant damage compared to demi-permanent options.

The other choices do not accurately convey the primary distinction between these two types of hair color.