Semi-permanent hair dye typically lasts for around 4-6 weeks, but it could start to fade gradually prior to that. The exact lifespan of the dye depends on several factors, including the original hair color, the quality of the dye, and how often the hair is washed and exposed to sunlight. Semi-permanent hair dye is less damaging to hair follicles than permanent hair dye because the color sits on the surface of the hair shaft rather than penetrating it. The dye doesnt contain peroxide or ammonia, which are harsh chemicals found in permanent hair dye.
Positive aspects of semi-permanent hair dye include that it fades gradually and enhances the natural hair color. Its also a good option for those who want to experiment with different hair colors without committing to a permanent change.
Negative aspects of semi-permanent hair dye include that it doesnt last as long as permanent hair dye and requires touch-ups every few weeks.
Ingredients or materials of semi-permanent hair dye vary depending on the brand and formula. However, semi-permanent hair dye typically doesnt contain ammonia or bleach.
