Final answer:
It is false that semi-permanent hair color can lighten hair; only chemical lighteners such as bleach can do so. Semi-permanent hair color deposits color and fades over time, but does not lighten hair.
Step-by-step explanation:
The statement that hair can be lightened from a semi-permanent haircolor is false. Semi-permanent hair color does not have the capability to lighten hair because it lacks the necessary chemical lighteners, such as bleach. Bleaching is the only permanent method that can remove the natural pigment in hair, hence lightening it. Though semi-permanent hair color washes out over time, it can only deposit color onto the hair, not lighten the existing shade.
Moreover, semi-permanent color is designed to provide a less harsh, more natural look, with subtle variations in color due to how each hair strand's original color and porosity affect the final outcome. This type of hair color is beneficial for blending a few gray and white hairs, but not as a lightening agent. With hair coloring being a common practice, it's essential to understand the distinction between permanent and semi-permanent hair colors to achieve the desired result.