Fingerprints in Forensics - General Types of Fingerprints

In the world of Crime Scene Investigation, there are three types of fingerprints that appear on the scene. In this article, I'll try to explain what the three types of fingerprints are.

In principle, the fingerprints come in three types that rely on how and where they have left behind sebe.Otiska finger across the oily wall is much easier to find than a plastic bag left at Wal-Mart without visible matter.

three types of fingerprints are as follows:

• Patent fingerprints happen when a medium such as grease, dirt, blood, ink or paint on the fingers of the perpetrators left behind the available fingerprint that is visible to the naked eye.
• Plastic Fingerprints have three-dimensional characteristic and occur when the perpetrator consciously or unconsciously presses a finger into the soft medium, such as margarine, soap, tar, wax, silly putty, or even dust.
• Latent fingerprints are invisible to the naked eye and can not be seen without special lighting conditions or special resources for processing.

of the first two types of fingerprints, patent and plastic, can be fotografirati.Fotografija can be used for comparison. Many times a fingerprint is illuminated at a slight angle to increase the contrast. However, very little else is needed to make these photos can be documented. If the offender does not leave behind any visible fingerprints, identification is likely to continue, but definitely more difficult to track down dobiti.Alati fingerprints can be as simple as Penlight black powder or as sophisticated as the chemical reaction, super glue or a laser. Regardless of technique criminal investigators to use depends on the surface of the underlying fingerprint. For a harder surface, powder generally used, and chemicals are a lot of times it takes on more porous surfaces. Some fingerprints are visible under ultraviolet light source or even a small flashlight.

The next time you watch your favorite CSI program, you will have insight on the conditions of the patent, plastic, and latent fingerprints.