Inkless fingerprints â € "Ink Stained Hands No.
It was the Chinese who discovered and started using fingerprints fingerprints as a means of individual identification. That was more than 1500 years but at the time they did not use it for solving crimes. One thing that the Chinese used it for the time was also a way for the signature and official documents and items such as works of art.
A big problem with the fingerprints was that the ink has been used to take the imprint real. This left the person who had been fingerprinted in black ink on all the fingers and hands, until finally brought off, which could take several days. Then, of course, new methods must be developed.
This in turn leads to Electronic scanning technology to be developed, but these methods and technologies also had their inherent defects. For example, they had a certain level of training to operate. In addition, they are often capricious and may take several tries before enrollment a copy viable.
With companies Increasingly, the government and private entities seeking to integrate the fingerprint in their daily activities a new method had be developed. One that contains the best aspects of all technologies that were developed previouslyÂ.
This led in development and growing popularity of fingerprint ink. With fingerprinting ink without the person being printed is presented with what looks like a stamp ink empty, devoid of ink.
In reality, the pad contains a chemical safe sticking to their skin like the ink would be. After they have applied their finger on the ink stamp without ink, then they push their finger on a piece of paper that is coated with another chemical reacts with the one contained in the ink pad. œPresto-â € chango €, an instant dark fingerprint appears!
How To Remove Ink Stains From Fabric Video Stains & Laundry Videos