Fingerprints

Question 1

3 Principles Of Fingerprints

Answer 1

-Individual characteristics
-Pattern will remain unchanged through an individual’s life.
-Distinct ridge patterns.

Question 2

Fingerprint Classes

Answer 2

-Loops
-Whorls
-Arches

Question 3

Loops

Answer 3

-Radial Loop - If the loop is going toward the forearm/thumb.
-Ulnar Loop - If the loop is going toward the pinkie or ulnar bone.

Question 4

Arches

Answer 4

-Plain
-Tented

Question 5

Whorls

Answer 5

-Plain whorl
-Double whorl
-Central pocket whorl
-Accidental whorl

Question 6

Ridgeology

Answer 6

The study of the uniqueness of friction ridge structures and their personal identification.

Question 7

Ridge Characteristics (E.g core, ridge, etc)

Answer 7

-Core
-Ending ridge
-Short ridge
-Fork or bifurcation
-Delta
-Hook
-Eye
-Dot/island
-Crossover
-Bridge
-Enclosure
-Speciality
*There can be scars too!!!!

Question 8

Types of fingerprints found on any surface.

Answer 8

-Plastic
-Patent
-Latent

Question 9

Plastic

Answer 9

Fingerprints left on soft surfaces such as paint, soap, dirt. Likely to be three dimensional.

Question 10

Patent

Answer 10

Visible prints formed through blood, dirt, ink, paint, etc.

Question 11

Latent

Answer 11

Prints formed when the body’s natural oils and skin and deposited onto a surface.
(Revealed using different techniques such as chemical reagents, alternate light sources and powders)

Question 12

Fingerprint powder

Answer 12

Applied by brushing onto a surface and works by adhering to the oil and moisture components of the fingerprint - making it visible.

Question 13

Ninhydrin

Answer 13

Reacts with the amino acids in the oil from the finger prints producing a blue-purple stain.

Question 14

Cyanocrylate

Answer 14

Cyanoacrylate is a substance in superglue that, when heated, releases into the air as a gas. This gas is attracted to the sweat and oils from fingers and crystallizes to leave behind a white residue that reveals the fingerprint