Yes, wash-out hair dye is designed to come out.
Wash-out, also known as temporary hair dye, works differently than permanent hair color. Instead of chemically altering the hair shaft, wash-out dyes simply coat the surface of the hair with pigment. This means that the color isn't permanently bonded to the hair and will fade and eventually wash away with shampooing.
Here's a breakdown of how wash-out hair dye works and why it comes out:
- Surface Coating: Wash-out dyes contain large color molecules that are too big to penetrate the hair cuticle. They sit on the outside of the hair shaft.
- Easy Removal: Because the color is just a surface coating, it easily rinses away with water and shampoo.
- Longevity: The number of washes it takes for the color to completely disappear varies depending on factors such as:
- Hair Porosity: Porous hair may absorb more color, making it last longer.
- Hair Color: Lighter hair colors will show the wash-out dye more vibrantly, and it may take more washes to completely remove.
- Dye Quality: Some wash-out dyes are more pigmented than others.
- Washing Frequency: The more you wash your hair, the faster the color will fade.
In short, the temporary nature of wash-out hair dye is due to its formulation and how it interacts with the hair. It's a great option for experimenting with different colors without the long-term commitment of permanent hair dye.
