1. Print Types
3 main types:
Loops
Whorls
Arches
ACOS 2.2, 2.3

2. Loops
A class of fingerprints characterized by ridge lines that enter from one side of the pattern and curve around to exit from the same side of the pattern
ACOS 2.2, 2.3

3. Loops, continued.. Two major Loop Types
Ulnar Loop- loop opens toward the little finger
Radial Loop- loop opens toward the thumb
ACOS 2.2, 2.3

4. Loops, continued.. Four distinct loop types
Plain- one ridge makes a complete circle
Central pocket loop- if two deltas do not touch on the circle
Double loop- two loops combined in one fingerprint
Accidental- the catch all category, if the print does not fall into any other category
ACOS 2.2, 2.3

5. Whorls
A class of fingerprints that include ridge patterns that are generally rounded or circular in shape and have two deltas
ACOS 2.2, 2.3

6. Arches
A class of fingerprint that is characterized by ridge lines that enter the print from one side and flow out the other side
ACOS 2.2, 2.3

7. Arches, continued..
Plain arch- simplest of all prints, line enters on one side of print and exits the other side
Tented arch- sharp spike in the center of the print
ACOS 2.2, 2.3