Latent Print Examination: Development of fingerprints on metal surfaces

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Latent Print Examination » Questions from FP Experts for FP Experts... Processing, Testimony, and Technical Matters » Development of fingerprints on metal surfaces

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Ernie Hamm

Posted on Tuesday, January 06, 2004 - 11:58 am:

Please see the following information:

Enhancement of Latent Prints on Metal Surfaces, Karie Smith and Chris Kauffman, Journal of Forensic Identification, 51:1 (2001) Comment: Use of 'Brass Black' and 'Aluminum Black' over 'Gun Blue' solutions STECH

James Shackel

Posted on Tuesday, January 06, 2004 - 10:04 am:

I have recently begun working in a fingerprint development lab in the UK and was wondering whether anyone could help me with a few problems we are experiencing:

1) Development of latent prints on metal substrates - we currently use CNA but are having limited sucess rates. Is this due to metal type and/or surface roughness/coating issues?

2) Fingerprint development on firearms - the issues are similar to those outlined above. I have read the previous forum on firearms and am intrigued by the sucess rates that have been achieved.

3) Methods for developing/enhancing prints left in light oil/grease i.e. food fats and petroleum based oils.

Any information would be greatly appreciated.

Kind regards,

James Shackel