Which type of color can gradually wash out over time?

Semi-permanent color is designed to gradually fade over time, typically lasting anywhere from a few washes to approximately 12 shampoos, depending on the hair type and condition, as well as the formulation of the color itself. This type of color does not contain ammonia and therefore doesn’t penetrate the hair shaft deeply; instead, it coats the hair and gradually washes out with regular washing.

In comparison, permanent color is formulated to last until the hair grows out or is cut off, as it involves a chemical process that opens the hair cuticle to allow the color to penetrate deeply. Temporary color, on the other hand, is intended for short-term use and lasts only until the next shampoo, but it doesn't provide the longer-lasting results that semi-permanent color offers. High-lift color is also a form of permanent color used to achieve lighter shades and is meant to provide lasting results.

Understanding the characteristics of semi-permanent color is vital for hair coloring practice, especially for clients looking for non-permanent options or those wanting to experiment with color without long-term commitment.