Your hair color is a huge deal. Getting your entire head a fresh color can really change your look. Single process all over color is applying color (or toner) over your entire head to lift and/or deposit in a single step. It’s perfect for shifting one or two levels, gray hair, or to bring life back into dull color.
Applying a single color all over up to your root will require touch-up maintenance. How often you visit your stylist depends on how fast your hair grows. Typically, roots begin to show after two to three weeks. Talk to your stylist about scheduling a root touch up every four to six weeks to remain flawless.