Patent prints are visible prints that occur when an outside substance located on the skin of a finger comes touches the smooth surface of another object. These prints leave a defined ridge impression that is visible without a microscope. The "blood on his hands" evidence is an example of patent prints recovered from a crime scene or scene of interest to investigators. These foreign substances contain dust particles which adhere to the ridges of the fingers and are easily identifiable.
"Blood on his hands"
Plastic prints are visible, impressed prints that occur when a finger touches a soft, malleable surface resulting in an indentation. Some surfaces that may contain this type of fingerprint are those that are freshly painted or coated, or those that contain wax, gum, blood or any other substance that will soften. These prints require no enhancement in order to be viewed, because they are easily seen.
Latent prints are prints that are buried within a surface/object. Normally you cannot see them with your eye alone. They are the result of sweat that builds up from sweat pores in the ridges of the fingers. Also, when you touch other parts of your body, the oil from those regions attaches to the ridges of the fingers, which may transfer when you touch a table or a lamp. These fingerprints have to be enhanced.
Good descriptions on the types of prints. Pretty informative, but not too much to read. Good balance.
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