|1. Loop Patterns:
In a Loop pattern, the ridges will flow in one side, recurve, (loop
around) touch or pass through an imaginary line drawn from the
delta to the core, and exit the pattern on the same side from which it
*A loop pattern has only one delta.
*There are two types of loop patterns:
1. Ulnar loop
2. Radial loop
*Loop patterns account for @ 70% of all fingerprints
|2. Whorl Patterns:
A whorl pattern consists of a series of almost concentric circles.
* A whorl pattern has two deltas
*There are four types of whorl patterns:
1. Plain whorl,
2. Central Pocket Loop whorl,
3. Double Loop whorl,
4. Accidental whorl
*Whorl patterns account for @ 25% of fingerprints
|3. Arch Patterns:
In an arch pattern, ridges flow in one side and flow out the
opposite side. There are no deltas in an arch pattern.
*There are two types of arch patterns:
1. Plain arch,
2. Tented arch
Arch pattern account for @ 5% of all fingerprints
|CLASSIFICATION OF FINGERPRINTS
1. The sorting of fingerprints into file groups so that a file may be set upon on
the basis of fingerprints alone. Fingerprints are classified by general
shape, (arch, loop, or whorl) position within the finger, and relative size.
2. Classification of fingerprints provides for an orderly placing of fingerprint
cards in a file.
Two methods of classifying fingerprints:
1. Henry Classification
2. NCIC Classification
|ALL FINGERPRINTS ARE PERMANENT AND INDIVIDUALLY UNIQUE
-The two innermost ridges which start parallel, diverge,
and surround or tend to surround the pattern area.
-When there is a definite break in a type line, the
ridge immediately outside of it is considered as its
-The point on a ridge at or in front of and nearest the center of
the divergence of the type lines.
-The delta area is located as a triangular area where the
ridges radiate outward in three directions.