How long do deposit-only hair colors usually last?

Deposit-only hair colors are typically designed to enhance or alter the color of the hair without containing harsh chemicals like ammonia or peroxide, which are used in more permanent dyes. These formulations generally coat the hair shaft rather than penetrate it, resulting in a temporary change in hair color.

The correct duration of 4 to 6 weeks is attributed to the fact that these colors gradually fade out with each wash and exposure. Factors such as hair porosity, the amount of product applied, and the frequency of washing can all influence how long the color lasts. Generally, a well-applied deposit-only color can maintain vibrancy for several weeks before significant fading occurs.

Other durations provided as options either underestimate or overestimate the typical longevity of deposit-only color products. Shorter periods, like 1 to 2 weeks, do not align with the expected behavior of these color treatments, while longer durations of 6 to 8 weeks exceed the normal lifespan of these types of hair color.