Magnetic Red Bi-Chromatic? powder has the unique property of being a black powder as well as a colored powder. When applied to a light-colored surfaces, the powder appears black. However, when it is applied to a dark-colored surface, appears bright red for easy photography. The greatest advantage of using Magnetic Red Bi-Chromatic? powder is that the lifted prints will be black when placed on a white backing card. This eliminates the bother of comparing latent prints with light-colored ridges on a black background against rolled prints with black ridges on a white background. It also means that only white backing cards will be needed. There is no need for black backing cards with Magnetic Red Bi-Chromatic? powder.