What technique is used to achieve highlights by isolating sections of hair?

The technique used to achieve highlights by isolating sections of hair is foiling. This method involves placing strands of hair in aluminum foil after applying a lightening agent. The foil helps to keep the applied product from mixing with untreated hair, allowing for a precise application that can result in vibrant, well-defined highlights. This technique is beneficial for creating contrast and dimension in the hair, making the highlights appear more pronounced and natural.

In contrast, shading typically refers to darkening areas of hair, and layering is a haircutting technique that involves cutting hair at different lengths to create volume and shape. Texturizing, on the other hand, usually pertains to techniques aimed at altering the structure of the hair to add movement or reduce bulk, rather than specifically highlighting hair. Therefore, foiling is the clear method that directly focuses on the highlighting process by isolating sections effectively.