What is a 'dual process color'?

What is a 'dual process color'?

Nancy Braun (Master Colorist) gives expert video advice on: What are highlights?; What is 'balayage'?; How often should I highlight my hair? and more...

A dual process color, or sometimes referred to as a double process, is a technique where you would do a single process, and you would perhaps maybe cover gray or lighten and do that first, rinse out the product, dry the hair. Some people actually do apply highlights on damp hair. And do a second process which would be highlighting in order to create contrast.