How long does the color last and how often should I use this shampoo?

This is a temporary color shampoo, so the shade does not stay in the hair permanently. It gradually washes out over several shampoos. Exactly how long the tone remains depends on your hair porosity, how often you shampoo, the water temperature, and the products you use afterward.

Because the effect fades, it can be used as a refreshing step between salon visits or before an event. Some people use it regularly to maintain or boost the red tone. To make the color last longer, avoid very hot water and harsh, aggressive washing; warm or cool water and gentle handling tend to be kinder to deposited pigment. If the tone becomes too strong, your normal shampoo will help fade it faster.

There is no single fixed schedule in the product description. Follow the instructions on the package and adjust frequency based on how your hair looks. Since the shade is not permanent, the tone naturally fades if you stop using it.