Exercise 2
Fingerprint Rolling Technique and Minutiae Identification
In this exercise, you will use proper fingerprint rolling technique to produce a set of either a volunteer’s fingerprints or, if a volunteer is not available, your own fingerprints. You will then analyze the minutiae of the collected fingerprints.
Procedure
Note: You may leave the remaining sections at the top of the FBI card blank.
Note: The ink should cover the terminal digit of the finger to the edges of the fingernail. Pressing the finger too hard may fill the grooves of the fingerprint with ink. This will prevent you from obtaining a clear fingerprint to analyze.
Note: If you are fingerprinting an individual, you should stand to their left. When rolling the fingers, roll them away from your body.
2020 Science Interactive. All rights reserved.Figure 5.
The finger is rolled from one side of the nail to the other.
Note: A quality fingerprint should clearly contain the ridge skin from nail to nail. This creates a rectangular fingerprint.
2020 Science Interactive. All rights reserved.Table 1.
Common ridge minutiae.
Clean Up
Exercise 2 – QuestionsQuestion 11. Were the fingerprints for each finger different or the same?
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Question 22. What is the difference between the individual fingerprints and when all four fingerprints were taken at the same time?
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