Fingerprint Lab Key

Fingerprint Types Although no two people have the same fingerprints, the are only three basic types of fingerprints	Modifications of the three basic fingerprint types.

Fingerprint Types

Although no two people have the same
fingerprints, the are only three basic
types of fingerprints

types of fingerprints

Modifications of the three basic fingerprint types.

move fingerprint types

tools of the trade One aspect of forensic science is collecting "latent" fingerprints - fingerprints left behind when someone touches an object. The science of fingerprints has changed markedly because of technology. However, "dusting" for fingerprints is still an important part of the process.

Different substances are used, depending on the surface being tested.

Aluminum dust is used on dark or mirrored surfaces.
Carbon black is used on light surfaces.
A luminescent powder is used so the print can be detected with a blacklight.

AFIS - Automated Fingerprint Identification System

Instead of using ink pads and index cards, today's fingerprinting is done with an electronic reader and data base. This makes fingerprints quickly available around the world.

Frequency of Fingerprint Types:

5% of the population has some type of arch fingerprint.
30-35% of the population has some type of whorl fongerprint.
60-65% of the population has some type of loop fingerprint.

The overall fingerprint type is used for general classification only. Actual identification of a person by their fingerprint is done by comparing the details within the print. Those details are shown in this diagram.

Conclusion:

After all groups have taken their fingerprints, compile the information from all groups to answer the lab question.