Rhodamine 6G is one of the best dyes to use with cyanoacrylate developed latents and a laser or forensic light source. Available as a premeasured concentrate to be mixed with methanol or distilled water. Rhodamine 6G is a fluorescent dye used to make cyanoacrylate developed latent prints more visible on various colored surfaces. Hit with a laser or alternate light source between 495-540 nm.