Which hair color classifications will wash out in fewer than 25 shampoos?

The classification of hair color that washes out in fewer than 25 shampoos is temporary hair color. Temporary hair colors are designed to coat the hair rather than penetrate it, allowing for easy application and quick removal. They last for a very short period, typically fading after just a few shampoos, making them ideal for those who want to experiment with color or are looking for a quick change without long-term commitment.

In contrast, permanent hair color involves a chemical process that alters the hair structure, ensuring that the color remains locked in until regrowth occurs or the color fades over time through washing and wear. Demi-permanent hair color, while less permanent than traditional permanent color, typically lasts longer than temporary color, usually around 20 to 28 shampoos, as it partially penetrates the hair cuticle.

Therefore, temporary hair color is specifically formulated for short-term use, distinguishing it from the longer-lasting classifications of hair color.