VISUALIZATION AND ENHANCEMENT OF LATENT FINGERPRINTS USING LOW PRESSURE DYE VAPOR DEPOSITION

摘要

Method and apparatus, restores and enhancing developing latent finger printss are worn her gas deposition (LPDVD) using low-pressure and are described. The method LPDVD of the invention keeps latent fingerprint visible for finely controlling deposition precursor and fluorescent dye, the combination of dyestuff or the precursor and dyestuff (14) for being pre-mixed dry solid compound. The steam that the LPDVD processes dilute carrying using the carrier gas of heating is sent into vacuum chamber (30), they are agglomerated to the exploitation of the product (32) of exposed surface there. The technique can be used for developing LPDVD and dive fingerprint on various substrates, including metal, plastics, glass and heat-sensitive paper, and it has been shown that carry out same or be better than conventional fingerprint development technique, on these surfaces.