CNN Forensic Files June 14, 2014 07:18:00
Infrared light causing the molecules to vibrate in unique ways. these can be charted to determine a samples chemical makeup. >> so if its a nylon, its going to show up as a nylon. if its rayon, its going to show up as rayon. if its a acrylic, it will be a totally different pattern. >> samples from the van and from danas clothe were both made from a compound known as nylon 66. to take the comparison one step further, analysts turned to a micro-spectrophotometer. >> that was basically a microscope...
Source: archive.org