Arizona Cosmetology Practice Exam

The key difference between semi-permanent and permanent hair color lies in their lasting effects and the processes involved in their application. Semi-permanent hair color typically lasts through several washes, usually around 4 to 12 shampoos, depending on the formula and hair type. It deposits color onto the hair without altering the natural hair structure or lifting existing color. Therefore, semi-permanent color can enhance or refresh hair without providing significant lightening.

On the other hand, permanent hair color contains a developer that opens up the hair cuticle and allows the color molecules to penetrate deeper into the hair shaft. This process not only provides long-lasting results but also enables the color to lift or lighten pre-existing hair color. Hence, the statement regarding semi-permanent color lasting longer while not lifting color accurately captures the essential distinction between the two types of hair color treatments.

Understanding these fundamental differences helps individuals choose the appropriate type of color based on their desired results, maintenance level, and potential hair health impact.