Tennessee Cosmetology Practice Exam

The technique of lightening hair by removing color is known as hair bleaching. This process involves using chemical agents, typically containing hydrogen peroxide or ammonia, that strip away the natural pigments from the hair. As a result, the hair becomes lighter, which can range from a subtle lift in color to a dramatic change, depending on the desired effect and the hair's current color.

Hair dyeing, on the other hand, generally involves adding color to the hair rather than removing it. Hair toning is more about adjusting or neutralizing brassy or unwanted tones after lightening, rather than the act of removing color. Hair highlighting refers to the process of lightening specific strands of hair to create dimension, rather than bleaching the entire hair. Therefore, the definition and function of hair bleaching is distinct and clearly fits the question's criteria.