What highlighting technique involves using a tail comb to part off a straight line through the hair?

The highlighting technique that involves using a tail comb to part off a straight line through the hair is slicing. This method is characterized by taking thin sections of hair and applying the lightener or color directly to these sections, creating a clean and defined look. The straight parting achieved with a tail comb allows for precise application, ensuring that the highlights are evenly distributed without mixing in with the natural hair color beneath.

Slicing is often chosen when a more dramatic contrast between the highlighted and unhighlighted sections is desired, making it effective for creating sharp, distinct highlights. This technique differs from others like balayage, which involves a more freehand approach, or weaving, where strands are taken and interspersed to create a more blended effect. Foiling typically involves wrapping sections of hair in foil, which is not the primary method used in slicing.