Which type of coloring technique involves freehand application?

The correct choice is the technique known as balayage, which involves freehand application. In balayage, the colorist paints the color directly onto the hair in a sweeping motion rather than using traditional foils or other methods. This approach allows for a more natural and sun-kissed effect, as the color can be strategically placed to create dimension without the rigidity of lines.

Balayage is especially popular because it offers a softer transitional look from the roots to the ends of the hair. The freehand method allows for greater creativity and customization, catering to individual client preferences and hair types. This technique contrasts with others that rely on more structured application methods.

In contrast, foiling involves wrapping sections of hair in aluminum foil to enhance the heat and intensity of the color, creating defined and more uniform highlights. Ombre refers to a color technique that involves a gradient effect from dark to light, usually requiring more abrupt color changes that are then blended. Highlights are achieved through various methods, including foiling and painting, but they typically involve application that produces more stark contrasts than the softer look of balayage.