Vaccum Metal Deposition

 

                                                             Crime Scene Chemistry

                                                                Fingerprint Detection

Vaccum Metal Deposition 

Most sensitive fingerprint detection 

With VMD, an exhibit is placed inside a chamber, according to a Web site for the Royal Canadian Mounted Police, and four to five milligrams of gold and several grams of zinc are loaded into evaporation containers placed beneath the exhibit. Pumps are activated that reduce pressure and a low voltage current evaporates the gold, leaving a minute deposit over the exhibit. "It is suspected that the gold actually absorbs into any fingerprint residue present"

Last Call Killer Caught 

Vaccum Metal Deposition 

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