What does the term "semi-permanent color" imply about its longevity?

The term "semi-permanent color" implies that it is designed to last for multiple shampoo sessions. This type of hair color doesn’t penetrate the hair shaft as deeply as permanent colors do, allowing it to gradually fade with each wash rather than remaining for several months. Typically, semi-permanent colors can last anywhere from 4 to 12 shampoos, depending on factors such as hair type, the specific product used, and how frequently the hair is washed.

Although it does have some longevity compared to temporary colors, which are very short-lived and usually meant for one-time use, semi-permanent color is not as long-lasting as permanent color, which can endure until the hair grows out. Additionally, while semi-permanent colors usually do not require a developer like permanent colors do, this characteristic doesn’t directly relate to its longevity. The focus on multiple shampoo sessions directly addresses the time frame in which the color remains visible on the hair.