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In which different ways can you test fingerprints? I would be very greatful for your answers!

Thank you very much

Answer 1:

To get a background on this topic, please click here and read the text below

Another way to detect fingerprints is vacuum metal deposition. In this process, the surface in question is placed in a vacuum chamber which is pumped down to a very low pressure. Then a thin layer of gold is deposited onto the surface, followed by the deposition of a thin layer of zinc. The zinc layer attaches to the gold in the area where there is no fingerprint. This creates contrast between the valleys and ridges of the print. Vacuum metal deposition works well only on smooth surfaces that are small enough to fit in an evaporation chamber; however it works very well in these cases and is becoming a popular means of latent fingerprint detection.

Many other methods also exist such as the use of argon lasers or infra-red spectroscopy.

References:
http://www.scafo.org/library/11 0502.html (Southern California Association of Fingerprint Officers)
http://www.rcmp-grc.gc.ca/fsis- ssji/firs-srij/bulletins/vacuum-vide-eng.htm (Royal Canadian Mounted Police)
http://en.wikipedia.org/wiki/Fingerprint#Late nt_fingerprint_detection


Answer 2:

Possible variables to test could be time, temperature (hot or cold) both at the time of leaving the print and changing the temperature after the print is left, or exposure to different solutions.

Some additional websites that may be helpful to look over:

w iki
a little history
f actors affecting latent prints


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