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Using cyanoacrylates (e.g., "Super
Glue" found in various instant bonding glues to develop latent prints on
objects has been quite successful over the past few years. Upon placing the
evidence and the glue product in an enclosed tank, such as a small fish
tank, the fumes from these liquid adhesives react with the residues in
latent prints to product hard, white visible impressions. The resulting
visible prints can be photographed and processed with powders or chemicals.
Fuming takes a few minutes, and
caution should be used to observe the process periodically, as "overfuming"
can occur. It is recommended that a black backing card with "test" latent
prints be placed in the container with the evidence. When the prints become
visible on the cards, remove the evidence from the chamber.
Hard Evidence™ liquid glue is
frequently used with a heat source to accelerate the process. The liquid
glue is placed in a small metal container or piece of aluminum foil and
placed on the hot plate. The one-pound liquid glue comes with five empty
one-ounce containers. It is easier to fill the smaller containers for use on
a daily basis than to use the large bottle. Store the large bottle in the
refrigerator to prolong its shelf life. |
