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 . Single-process: A single process refers to any color service that is done in one step. This can be using a permanent color that lifts and deposits, a glaze, highlights/lowlights without toning, or a creative color service with only one process. Mar 28, 2014 - Single Process means that a new color or toner is applied all over to create a new base color. The hair is lifted and deposited in one easy step. It's the most common out of the two, and it's wonderful for covering grays and adding shininess to dull hair. Plus, it's also great for the home hair colorist. All-Over Hair Color. Also commonly called 'single-process hair color,' all-over color is a one-step process that involves coating the hair with a single shade. Within all-over/single process hair color, there are three levels: semi-permanent, demi-permanent, and permanent. Mar 24, 2011 - Single process colour is all one tone. It can be permanent or semi-permanent, but there are no highlights—your entire head is the same. 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. Feb 18, 2016 - How it looks: Hair is colored darker at the roots (or left alone if naturally . How it looks: Single process will not have as much variety as double . Nov 5, 2012 - The phrase 'single-process hair color' might conjure thoughts of bad home dye jobs or retro beauty icons, but today's version is a far cry from .