Ace Your Nevada Cosmetology Board Exam 2025 – Glow and Go with Confidence!

Semi-permanent hair color is characterized by its ability to gradually fade over time, typically lasting around 4 to 6 weeks. This duration allows for color enhancement without the commitment associated with permanent color, which alters the natural hair structure more significantly and lasts longer. Semi-permanent dyes do not penetrate the hair shaft as deeply as permanent dyes, making them a popular choice for individuals seeking versatility to experiment with color while maintaining the option to return to their natural shade more easily.

The other durations mentioned in the options extend beyond the typical semi-permanent range, moving into longer-lasting formulations, which would align more closely with demi-permanent or permanent hair colors rather than semi-permanent. Thus, the choice that accurately reflects the characteristics and the typical longevity associated with semi-permanent hair color is the one that indicates lasting for 4 to 6 weeks.