What is the function of a bleach in hair coloring services?

The function of bleach in hair coloring services is primarily to lighten the natural color of hair. Bleach works by breaking down the natural pigment (melanin) in the hair, which allows for a lighter base to be created. This is crucial for various coloring techniques, particularly when transitioning to a significantly lighter shade or when creating highlights.

Using bleach effectively prepares the hair for subsequent application of color by ensuring that the new hue appears vibrant and true to the intended shade. It's important to apply this process carefully, considering the hair's condition, as over-bleaching can lead to damage. The primary goal is to remove pigment rather than enhance or cleanse the hair, which distinguishes bleach's purpose from that of other hair products designed for shine or scalp health.