Patent fingerprints are impresssions that are obvious to the human eye. They are from foreign substances that are left on the finger then transfered onto the surface of something. Like latent fingerprints they are photgraphed. But they need no enhancement because they are already visible. After being photographed they are lifted with clear tape and entered into IAFIS to be cross examined with the prints on file. Patent fingerprints are made up of substances like dirt, ink, and blood.
A cup with visible red prints on it.
Plastic fingerprints are friction ridges on the skin that leave impressions. There deposited in materials that maintain the original shape of the ridge detail. An example of a plastic print is when candle wax melts onto fingers. These finger prints are also visible to the naked eye, so they need no enhancement. Like other latent and patent fingerprints they are lifted with clear tape and entered in IAFIS.
This is a picture of a man using the system IAFIS.