While water can dissolve the black inks, we need paper to more clearly separate the different colored inks
Every person has unique fingerprints that can leave invisible marks on anything they touch!
The skin on our fingers is coated with sweat and oils that stamps invisible fingerprints on doorknobs, glasses and all other surfaces! These fingerprints can be sorted into 2 main types: arch, loop and whorl.
Because they can easily be left behind on many surfaces, fingerprints are a great piece of evidence for detectives and forensic scientists to use.
To make a fingerprint to be visible to the naked eye, detectives and forensic scientists dust for fingerprints using lycopodium powder.