Which technique involves applying a lightening agent followed by the color application in two steps?

The technique that involves applying a lightening agent followed by the color application in two steps is known as double-process coloring. This method is designed for achieving a significant change in hair color, especially when going from a darker base to a lighter or more vibrant tone.

In the first step, a lightening agent, typically a bleach or high lift color, is applied to remove pigmentation from the hair. This allows for a lighter base to be created. After the desired level of lightness is achieved, a second application of color is done to deposit the new shade over the pre-lightened hair. This two-step process allows for greater control over the final color and can result in more vivid and accurate tones that might not be possible with single-process coloring, which combines these steps into one application.

Understanding the double-process technique is essential for barbers and stylists looking to offer their clients the latest color trends and transformations while ensuring the integrity and health of the hair.