What is the term for the technique of decolorizing hair and then recolorizing it with new pigment?

The technique of decolorizing hair and then recolorizing it with new pigment is commonly known as double-process. This method involves two distinct steps: the first step is the removal of existing color from the hair, a process known as decolorization or bleaching. This is essential for achieving a lighter base for the second step, which is the application of a new color or pigment to achieve the desired shade.

Double-process is particularly effective for those looking to achieve significant color changes, especially when transitioning from a darker shade to a much lighter one or when introducing vibrant fashion colors. This technique provides the necessary foundation to allow new colors to stand out and appear true to their intended shade.

In contrast, single-process refers to applying a new color in one step without the decolorization phase. Color retouch is focused on refreshing the color at the roots, often for maintaining a previously applied color without the need for decolorization. Highlighting involves lightening specific strands of hair rather than the entire head. Therefore, recognizing the distinction between these methods is crucial for understanding the hair color service process in cosmetology.