What is another term for hair color that does not penetrate the hair shaft?

Temporary hair color is indeed the correct term for color that does not penetrate the hair shaft. This type of color typically coats the hair cuticle and washes out after a few shampoos. It is frequently used for events or occasions where a short-term change in hair color is desired. Temporary color can be applied without the use of harsh chemicals, making it a less damaging option.

In contrast, semi-permanent color does slightly penetrate the hair shaft but is designed to last longer than temporary color, generally fading after several washes. Oxidative and permanent colors involve a chemical reaction that allows the dye to enter the hair shaft and provide a longer-lasting effect, which differentiates them further from temporary color. By understanding these differences, it becomes clear why temporary color is distinct in its application and longevity.