Cool Do Black Lights Show Blood Ideas. Web what body fluids glow under black light? How does uv light help in finding blood?
What does uv light reveal? One type of lamp has a violet filter material, either on the bulb or in a separate glass filter in the lamp housing, which blocks most visible light and allows through uv, so the lamp has a dim violet glow when operating. Saliva, semen, urine and blood.
