File:Forensics; Serial Numbers; Firearms (16706357512).jpg

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For an experiment to recover serial numbers that have been destroyed, NIST researchers hand-stamped X imprints into stainless steel (first image) to simulate a firearm serial number. Then they polished away the imprints (second image, scale bar in millimeters). Researchers recovered the imprints (third image) by combining pattern quality maps, calculated by software, which reveal crystal damage and deformation in the steel.

See also www.nist.gov/mml/acmd/ebsd-021115.cfm

Credit: White/NIST

Disclaimer: Any mention of commercial products within NIST web pages is for information only; it does not imply recommendation or endorsement by NIST.

Use of NIST Information:

These World Wide Web pages are provided as a public service by the National Institute of Standards and Technology (NIST). With the exception of material marked as copyrighted, information presented on these pages is considered public information and may be distributed or copied. Use of appropriate byline/photo/image credits is requested.
Date
Source Forensics; Serial Numbers; Firearms
Author National Institute of Standards and Technology

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Public domain
This image is in the public domain in the United States because it is a work of the United States Federal Government, specifically an employee of the National Institute of Standards and Technology, under the terms of Title 17, Chapter 1, Section 105 of the US Code.

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This image was originally posted to Flickr by National Institute of Standards and Technology at https://flickr.com/photos/63059536@N06/16706357512. It was reviewed on 7 September 2016 by FlickreviewR and was confirmed to be licensed under the terms of the United States Government Work.

7 September 2016

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Date/TimeThumbnailDimensionsUserComment
current01:25, 7 September 2016Thumbnail for version as of 01:25, 7 September 20162,400 × 894 (1.05 MB)Vanished Account Byeznhpyxeuztibuo (talk | contribs)Transferred from Flickr via Flickr2Commons

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