what is ninhydrin fingerprinting
Ninhydin is a chemical that reacts with the aminio acids found in fingerprints. When the chemical contacts the amino acids, the combination of the two turns a bright purple color.The coloring is known as Ruhemannâs purple, named after the man who discovered ninhydrin, Siegfried Ruhemann.inhydrin comes in pre-mixed aerosol cans and, in a chrystal form. When using the chrystals, detectives and crime scene investigators must mix the ninhydrin with a carrier, such as acetone â the same chemical thatâs found in fingernail polish remover â or alcohol. The mix is then placed in a spray bottle for use.