Chromatography is used to identify different inks.
Then determine which is the most similar to the actual blood.Pinterest 260, pins 435, followers, fREE Forensic Science Curriculum For High Schoolers.Other prints are latent you cant see them, but there are marks left by sweat and rar repair tool full version with crack other organic residue from fingers.A simple way to make impressions is to carefully bite down into an apple or other soft food, but you can also bite into a folded sheet of white paper with a piece of carbon paper inside.Use clear tape, sticky side down, to lift the print and then stick it to an opposite-colored paper.(Look at examples of different fingerprint patterns.) Your fingerprints are different than anyone elses, but did you know that fingerprint patterns tend to run in the family?Professionals also study handwriting and can analyze a sample of disguised writing to see if it has characteristics that match a suspects normal writing.The three typical patterns are loops, whorls, and arches.
You should see white fingerprint images on the object after a half hour.
Where did they likely come from?
If you have a microscope, compare different kinds of hair at high power magnification.Certain chemical fumes react with the sweat and other organic residue left in latent fingerprints.Professionals also use ninhydrin (which reacts with amino acids in latent prints) and silver nitrate powder developed under a UV light.How does it work?See how many clues you can identify in your own crime scene.You can experiment with this yourself: all you need is an aluminum pie plate or square of aluminum foil folded in fourths, a glass jar, superglue, and a smooth object like a pen or a marker lid.If you have a magnifying glass, inspect your fingers.Forensic Science Detective's Toolkit, forensic Chemistry identify the mystery substance.