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Marks and Impressions

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Total cards: 24•Content version: v4•Public deck•Updated: 8/1/2026

Card preview (24)

#1
Front (Question)

what are examples of body prints?

Back (Answer)

finger, lip, ear and foot

#2
Front (Question)

what are examples of tool prints?

Back (Answer)

chisel, hammer, pliers

#3
Front (Question)

what are examples of manufactured items that can leave prints?

Back (Answer)

tyres and shoes

#4
Front (Question)

what other types of marks and impressions can be made?

Back (Answer)

weapons, bullets

#5
Front (Question)

what is a positive impression?

Back (Answer)

An impression where material has been deposited

#6
Front (Question)

what san example of a positive impression?

Back (Answer)

marks in blood

#7
Front (Question)

what’s a negative impression?

Back (Answer)

material is removed

#8
Front (Question)

what’s an example of negative impressions?

Back (Answer)

impressions found in dust

#9
Front (Question)

what’s an example of indented impressions ?

Back (Answer)

where the surface is left deformed

#10
Front (Question)

what is an example of indented impressions?

Back (Answer)

shoe prints in mud, or tool marks

#11
Front (Question)

what is damaged based evidence?

Back (Answer)

identifying manufactured items traits which enable individualisation

#12
Front (Question)

what san example of damage based evidence?

Back (Answer)

tool marks, shoe prints and tyre prints

#13
Front (Question)

what are non damage based evidence?

Back (Answer)

individual traits acquired naturally and every item is unique

#14
Front (Question)

what’s an example of non damage based evidence?

Back (Answer)

fingerprints, lip prints and ear prints

#15
Front (Question)

How do you identify impressions at a crime scene?

Back (Answer)

white light, UV, polarised light, monochromatic light, argon laser light, fluorescence imaging.

#16
Front (Question)

what do you do after you identify impressions?

Back (Answer)

enhance them

#17
Front (Question)

what is chemically enchanting impressions?

Back (Answer)

addition of reagents to alter the material, defining the mark

#18
Front (Question)

what’s an example of chemical enchantment for blood marks or fingerprints ?

Back (Answer)

treating on paper with ninhydrin or DFO to reveal detail in purple

#19
Front (Question)

what is physical enchancement?

Back (Answer)

physical adhesion of material to make the residue or lifting prints to enhance contrast

#20
Front (Question)

what two factors have to be considered when retrieving impressions?

Back (Answer)

nature of surface and impression

#21
Front (Question)

how do you lift fingerprints of a non porous surface?

Back (Answer)

Dust cyanoacrylate fuming wash with MoS2

#22
Front (Question)

how to enhance iron coloration in soil?

Back (Answer)

treat soil with thiocynanate

#23
Front (Question)

how to deal with chalky soil prints ?

Back (Answer)

use bromophenol blue to make the print turn blue

#24
Front (Question)

what increases the contrast of oily marks?

Back (Answer)

iodine vapour