From the researchs performed at the laboratory we know that UV itself
alone is not an effective tool for detecting untreated prints. However RUVIS,
the acronym used for reflected ultraviolet imaging system, makes the visualisation
of untreated or superglue fumed latents possible. Ruvis has been
developed by the Japanese National Police and extends forensic examination
capabilities into the portion of light spectrum below 360 nm. A 105 mm
ultraviolet lens and an intensifier are the main parts of this device. As the
light source we make use of a portable short wavelenght (254 nm)UVlamp.