Ask Me Everything4
o
rWhere do i fingerprints come from?
The fingerprints you leave behind when you touch something are caused by oily sweat coming out of pores (holes) on raised lines called friction ridges that are found on your fingertips.
I ■ Using fine powder and a soft brush gently dust a surface where fingerprints might be present.
■ Stickthetape on to white cardboard.
^ * ■ The powder sticks to the prints and shows them up morę clearly.
Press elear tape on to the dusted print. Peel off the tape, and the print comes with it.
What about me?
Your fingerprints are different from everyone else’s. Even identical twins have different fingerprints.
(c) 2011 Dorling Kindersley. Ali Rights Reserved.
Crime science
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