A novel approach to identify the presence of fingerprints on wet
surfaces In forensic science, one of the major problems is
trying to reveal the presence of fingerprints on wet surfaces.
Not often are fingerprints left in protect environments, so we
have to detect their presence on the most different surfaces,
after they underwent to the action of atmospheric agents or have
been found, for example, on objects floating in the water. Small
Particle Reagents (SPR) is a technique performed to detect
latent fingerprints left on wet or moist surfaces based upon the
reaction between the fatty-acid residuals present in the traces
and hydrophobic tails of the specific reagents. Those tails are
linked to a hydrophilic head reacting with a titanium dioxide
salt giving a white precipitate plainly detectable. In this
report, we want to show that exalting fingerprints left on
plastic, glass and metal wet surfaces is possible with the SPR
technique independently on the time fingerprints were in contact
with water, as we per