Fingerprints

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Principles of Fingerprints

First Principle: A fingerprint is an individual characteristic;

no two fingers have yet been found to posses identical

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Principles of Fingerprints

Second Principle: A fingerprint will remain unchanged during

an individual's lifetime.

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John Dillinger

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Principles of Fingerprints

Third Principle: Fingerprints have general ridge patterns

that permit them to be systematically classified.

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Three Main Types of Prints

LoopsWhorlsArches

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Deltas & Cores

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Loops

A loop must have one or more ridges that enter from one side of the print, re-curve, and exit from the same side

One Delta & One Core

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Whorls

One or more coresAt least two deltas

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Arches

An arch is formed by ridges entering from one side of the print, rising slightly and exiting on the opposite side.

No Deltas & No Cores

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