Fingerprints

Ridge dot

Bifurcation

Double bifurcation

Opposed bifurcation

Trifurcation

Ending Ridge

Ridge Crossing

Enclosure

Short ridge (island)

Bridge

Delta

Core

Radial loop

Loop towards thumb

Ulnar loop

Loop away from the thumb

Plain Whorl

Symmetric deltas, circlular pattern

Central Pocket Whorl

Asynmmetric deltas

Double Loop Whorl

2 loops/2 deltas, looks ,ike “s”

Accidental Whorl

Usually at least 2 deltas and some other fingerprint pattern

Plain Arch

Simple, mild bulge

Tented arch

Acts like a pole in the middle of the tent

Plastic fingerprint

Finger touches a plastic item and leaves a negative impression (fresh paint, soap, tape, candles, tar)

Foreign matter prints

Finger contacts dust and is transferred to a clean object (blood, dye, wet paint)

Latent prints

Hidden, must be adapted to see, perspiration

Inorganic

Not based on carbon

Cation

positively charged ion

Anion

Negatively charged ion

Major Perspiration components

Na+, K+, CA+2, Fe+2

Inorganic Major Perspiration components

Cl-, F-, HCO3-. PO4-3, SO4-2

Inorganic Minor Perspiration components

Mg+2, Zn+2, Cu+2

Molecule

Non-metal bonded compound

Side chain

Determines the 20 amino acids

Perspiration components

Lipids, glucos, urea, ammonia