Non-pigmented hair or red colors will do what to red light lasers?

Non-pigmented hair or red colors primarily reflect red light wavelengths rather than absorb or transmit them. This is because lighter colors, including red or non-pigmented hair, have less melanin, which is the pigment that absorbs light across various wavelengths. Therefore, when a red light laser is directed at non-pigmented hair or red colors, the light is more likely to reflect off the surface rather than being absorbed into the hair structure.

In the context of laser treatments, understanding how different hair colors interact with laser light is crucial, as this affects the efficacy of the treatment. For example, dark pigmented hair would absorb the laser light more effectively, leading to better results in hair removal procedures, while non-pigmented hair may require different settings or laser types to achieve similar results since it reflects rather than absorbs the light.