Professional In-Salon Haircolor Term Glossary by Redken. . Double-process: A double-process color refers to anytime two color services are done in one visit. Mar 24, 2011 - Eeks! Two days in a row of hair colour posts—and slightly shouty ones at that. I'm sorry. I didn't mean to insinuate that you have bad hair, . What's the difference between single vs double process color? We're here to school you on picking the best, cost and time effective solutions for your hair. Mar 28, 2014 - Say you're at the salon looking over the color treatment service menu, and you get a little puzzled. Should you have the single process color, . May 4, 2017 - Stripe-y highlights, extreme ombré, box dye disasters — most of us have experienced some sort of hair color nightmare, whether in the chair or . My hair's been highlighted, it's been dyed nearly black—and so I thought of the . Calling it a 'double process'—meaning bleach (strip existing color) and tone . Apr 3, 2018 - When it comes to hair color, you basically have three options: highlighting, single-process color, or double process. But which one is best for . Explore hairsugar's board 'Double Process Color' on Pinterest. See more ideas about Hairdos, Hair cut and Blonde hair.