What is whorl fingerprints?
Whorl, plain – A type of print pattern that consists of one or more friction ridges making a complete circuit and two deltas; an imaginary line drawn between the two deltas touches or crosses at least one recurving ridge within the inner pattern area.
Is whorl fingerprint common?
Whorls. These can be found in about 25 to 35% of the fingerprints that are encountered. Some of the ridges in a whorl make a turn through at least one circuit. Therefore any pattern that contains two or more deltas will be a whorl.
What is plain whorl?
1. Plain Whorl: A plain whorl consists of one or more ridges which make or tend to make a complete circuit, with two or more deltas, between which, when an imaginary line is drawn, at least one recurving ridge within the inner pattern area is cut or touched.
How do you identify an accidental whorl?
An accidental whorl consists of a combination of two different types of patterns with the exception of the plain arch, with two or more deltas or a pattern which possesses some of the requirements for two or more different types or a pattern which conforms to none of the definitions.
What are the four types of whorls?
There are four groups of whorls:
- Plain (concentric circles),
- Central pocket loop (a loop with a whorl at the end),
- Double loop (two loops that create an S-like pattern)
- Accidental loop (irregular shaped).
Which fingerprint is the rarest?
1: The Arch. Plain Arch – Raised ridges characterize this pattern and they extend from one side of the finger to the other in a continuous fashion. This pattern makes up a mere 5% of the total population, making it the rarest type.
What is the difference between a radial and ulnar loop?
What’s the difference between an ulnar loop and a radial loop? a radial loop opens toward the thumb and an ulnar loop opens toward the little finger.
How do you trace a whorl?
A whorl – type pattern which has been fully rolled from nail to nail either side, will be given the tracing of the opposite finger and referenced to the two other tracings. If the opposite pattern is not a whorl, the whorl – type pattern will be classified as a meet tracing and referenced to an inner and outer tracing.