Go from Brown to BlondeQ: Are there any products or new techniques that now make it possible for those with dark brown hair (let's say level 2) to go a true dark blond (level 7) without going through a two-step process? Especially for touch-ups on the root area, is there no easier way to lighten 4-5 levels from brown to blonde without bleaching first?
A: Currently, while there are advances in chemistry for hair color and bleaching, you still need to use pre-lightening to get pure colors in high-lift color processes. In some cases, you can get 4-5 levels of lift by using high-volume peroxide developers (such as 50-volume developer), but these developers should only be used by trained professionals in a salon setting and monitored closely. Without proper application, and even heating to process the lifting action, you can end up with uneven and splotchy results.
I will never advocate an individual attempting to use any developer above 30-volume in strength, and I personally would urge caution before attempting to lift the hair more than three shades without professional assistance.
If you already go to a salon and your stylist prefers using a two-stage color process, there are probably good reasons for doing so. It may be a matter of better controlling the processing, and there may be problems with your hair that your stylist is keeping in consideration.
Hair coloring and bleaching
What does developer do?
The 10 different hair color levels