Before revision: Traditional fingerprints are performed by using a technique called Chianese, Moscato, Penta, Picariello, Contrast Enhancement,Image Analysis and Recognition Volume 4142/200621 09 2006 274-285. accessed (14 Oct 2008) which involves using powders, liquids , or vapors to add color to the fingerprint so it can be easily distinguished.
After revision: Traditional fingerprints are performed by a technique using powders liquids , or vapors to add color to the fingerprint so it can be distinguished.