No, semi-permanent hair dye is not permanent.
Understanding the Difference Between Semi-Permanent and Permanent Hair Dye
Permanent hair color penetrates the hair shaft, altering its structure to lock in the color. This means the color will last until the hair grows out. In contrast, semi-permanent hair dye only coats the outside of the hair shaft. Because it doesn't penetrate the hair, it's temporary and washes out gradually with each shampoo.
- Permanent Hair Dye: The color is integrated into the hair's structure, making it long-lasting.
- Semi-Permanent Hair Dye: The color sits on the hair's surface, resulting in a temporary color change that fades over time.
The key difference, as noted in the provided reference, lies in the location of the color. Permanent hair color alters the hair shaft's structure for a lasting effect, while semi-permanent color merely coats the surface. This surface deposition means the color is easily removed with repeated washing.
Think of it like painting a wall: permanent dye is like painting directly onto the wall's surface, while semi-permanent dye is like applying a temporary sticker. The sticker will eventually peel off, whereas the paint requires more effort to remove.
