In hair coloring, what does the term “semi-permanent” refer to?

The term "semi-permanent" in hair coloring specifically refers to a type of color that gradually washes out over time. Unlike permanent color, which contains chemicals that open the hair cuticle and allows color to penetrate deeply, semi-permanent colors typically coat the hair without altering its natural structure significantly. This means that as the hair washes and the color fades, it does so gradually, allowing for a more subtle change and easier maintenance without the harsh line of demarcation that can occur with permanent dyes.

Semi-permanent hair colors may last from a few weeks up to a couple of months, depending on factors such as hair type, the specific product used, and how often the hair is washed. This characteristic makes semi-permanent color a popular choice for individuals looking to add a temporary change without the commitment of permanent dye.

In contrast, other options do not accurately describe semi-permanent hair color; they refer to different aspects such as the longevity of other types of color treatments or specific application methods. Understanding the nature of semi-permanent color helps cosmetic professionals choose appropriate products based on their clients’ needs and desired outcomes.