Young Girl With Light Colored Hair

Foiling, where pieces of foil or plastic film are used to separate off the hair to be colored; especially when applying more than one color.
Cap, when a plastic cap is placed tight on the head and strands are pulled through with a hook.
Balayage, where hair color is painted directly onto sections of the hair with no foils used to keep the color contained.
All application techniques can be used with any type of color. For highlights, the hair will usually have to be bleached before coloring.