Which developer volume provides maximum lift in a one-step color service?

In a one-step color service, the use of a developer is crucial for the desired level of lift and color deposit. A 40 volume developer is designed to provide maximum lift, often used for achieving significantly lighter results, particularly when working with dark hair. This developer contains a higher concentration of hydrogen peroxide, enabling it to penetrate the hair shaft more effectively and facilitate greater lightening.

When using a 40 volume developer, the formula allows for lifting the hair color dramatically, making it suitable for clients who want to go several shades lighter in a single application. This lifting capability is essential for overcoming the natural pigments in the hair, thus achieving the intended color result.

In contrast, lower volume developers, such as 10 or 20 volume, are generally used for deposit only or limited lift (one to two levels), while 30 volume provides moderate lift but not to the maximum extent that a 40 volume developer does. The specific application will depend on the starting hair color and the desired end result; however, for maximum lift in a one-step process, 40 volume is the standard choice.