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Please use this identifier to cite or link to this item: http://hdl.handle.net/10373/1265

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Title: Controlling the variable of pressure in the production of test footwear impressions
Authors: Farrugia, Kevin J.
Riches, Philip
Bandey, Helen
Savage, Kathleen
NicDaéid, Niamh
Affiliation: University of Abertay Dundee. School of Contemporary Sciences
Keywords: Footwear impressions
Pressure
Blood
Luminol
Acid yellow 7
Stamping
Issue Date: Sep-2012
Publisher: Elsevier
Type: Journal Article
Refereed: peer-reviewed
Rights: Published version (c)Elsevier, available from http://dx.doi.org/10.1016/j.scijus.2011.11.002
Citation: Farrugia, K.J., et al. 2012. Controlling the variable of pressure in the production of test footwear impressions. Science and Justice. 52(3): pp.168-176. Available from http://dx.doi.org/10.1016/j.scijus.2011.11.002
Abstract: Footwear impression lifting and enhancement techniques may be affected by several variables introduced during the production of test footwear impressions, thus limiting the usefulness of enhancement technique comparisons and the results obtained. One such variable is the force applied when the impressed mark is being made. Producing consistent test impressions for research into footwear enhancement techniques would therefore be beneficial. This study was designed to control pressure in the production of test footwear impressions when mimicking a stamping action. Twenty-seven volunteers were asked to stamp on two different surfaces and the average stamping force was recorded. Information from the data obtained was used to design and build a mechanical device which could be calibrated to consistently deliver footwear impressions with the same force onto a receiving surface. Preliminary experiments using this device and different contaminants on the footwear sole have yielded consistent and repeatable impressions. Controlling the variable of pressure for the production of test impressions in this study demonstrated that the differences observed were visual (due to the amount of contaminant transferred and subsequent enhancement) and did not affect the replication of outer sole characteristics. This paper reports the development of the device and illustrates the quality of the impressions produced.
URI: http://hdl.handle.net/10373/1265
ISSN: 1355-0306
Appears in Collections:Science Engineering & Technology Collection

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