Discussion
Which of the following methods is best suited to recover dusty footwear impressions from a surface ?
Answer: C
Dusty footwear impressions are best recovered by electrostatic lifting.
A dust print is a two-dimensional impression of loose dust on a surface such as a floor or a sheet of paper. An electrostatic dust print lifter lays a metallised film over the print and charges it, and the dust particles are attracted to the film, transferring the impression without disturbing it. The lifted print is then photographed under oblique light.
Plaster, dental stone, wax and sulphur casting are for three-dimensional impressions in soil, sand or snow. Poured on a dust print they would destroy it.
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