Background surfaces containing multiple colors are often times processed with fluorescent powder, as the brilliance of the powder will contrast with the background allowing for detailed photography. Orange Fluorescent Powder fluoresces with a forensic light source under UV or blue wavelengths. Powder should be applied with an Orange Feather Brush. Black backing cards or gellifters may be used to provide a sharp contrast with the resulting ridge detail. NOTE: To prevent clumping, our powders include a desiccant canister inside each jar with a capacity for absorbing moisture.