Toning, glazing, glossing, overlay. There are many different terms for the “second act” of a haircolor service, and to be honest, many colorists disagree on the precise definition and details of each of these terms.

Some colorists assert that glazing is a process that should be done only with a demi-permanent formula. Others, like International Platform Artist and Educator Sue Pemberton, say that strictly speaking, toning is defined as the process that’s done to refine a full-head bleach or bleach highlights, while glazing is a service performed on natural or colored hair to add shine or warmth…