What type of hair color is applied to the surface only, without penetrating the hair shaft?

The type of hair color that is applied to the surface only and does not penetrate the hair shaft is temporary hair color. Temporary hair color products coat the hair strands, providing a vibrant look without altering the natural pigmentation of the hair. This type of color typically lasts a short time and can be easily washed out with shampoo, making it ideal for those seeking a quick change without long-term commitment.

In contrast, permanent hair color changes the natural color by penetrating the hair shaft's structure and altering its pigment permanently. Semi-permanent and demi-permanent hair colors also involve some degree of penetration into the hair but to a lesser extent than permanent colors, often lasting longer than temporary options but still not as long-lasting or deeply altering as permanent colors. Temporary hair color stands out for its shallow application, suitable for special occasions or experimentation.