What does the term stage refer to in the process of lightening hair?

The term "stage" in the context of lightening hair refers specifically to a detectable change in hair color during the lightening process. When hair is lightened, it undergoes a series of transformations that reveal different shades, typically progressing from darker to lighter tones. Each stage corresponds to a visible change in the hair's color, indicating the effectiveness of the lightening product being used and the extent of the chemical reactions occurring within the hair strands.

Understanding the stages of lightening is crucial for hair colorists, as it helps them monitor the process and determine when to stop the application, ensuring that the desired result is achieved without causing unnecessary damage to the hair. Each stage reflects the level of melanin being removed, which helps in creating a final color that meets the client's expectations.

The other options describe different aspects of hair coloring but do not accurately capture the specific meaning of "stage" in this context. For example, while a specific level of lightening achieved could refer to an end result, it does not encompass the transition phases involved in lightening. Similarly, the phase of color application pertains to the timing or method of applying the product rather than the process of change itself. Lastly, the drying process after treatment is unrelated to the concept of