Define 'tint back' in hair coloring.

'Tint back' refers to the process of adding a darker color to previously lightened hair. This technique is often utilized when a client wishes to return to a more natural or darker shade after having their hair colored lighter. It can be necessary for various reasons, such as the desire for a richer, deeper tone or to cover up any unwanted highlights or lightened areas that no longer suit their style.

By applying a darker tint, colorists can achieve a seamless blend that helps to mitigate the stark contrast between the previously bleached sections and the natural hair color. This process not only restores color depth but can also enhance shine and overall hair health, especially if done with proper care and quality products. The skillful application during a tint back is essential to ensure the result looks harmonious and natural, ultimately fulfilling the client's request for a color adjustment.