Fiber Analysis Quiz 2 Fully Solved

Fiber - the smallest indivisible unit of a textile Textile - a flexible, flat material made by interlacing yarns (or "threads") Locard's Principle - fibers often fall off and are picked up during normal activities Very small fibers easily shed from most textiles and can become ________________ - trace evidence Direct transfer - fibers are transferred directly from victim to suspect or suspect to victim Fiber evaluation can show such things as the ______ of fiber, its _______, the possibility of ____________, location of suspects, and point of _________ - type, color, violence, origin Secondary transfer - fibers are transferred from a source, to the suspect and then to a victim (or from a source, to a victim, and then to a suspect) Fibers are collected by - vacuuming, adhesive removal, and forceps Natural - derived from animals, plants, and minerals Synthetic - produced in a laboratory. The fibers are produced by joining many monomers together to form polymers, vary widely in cross-sectional shape and diameter, generally straight to gentle curves, very uniform in diameter, may have surface treatment that appears as spots, stains, or pits Plant fibers can ________ water - absorb Plant fibers are __________ in water - insoluble Plant fibers are very ______________ to damage from harsh chemicals - resistant Plant fibers can only be dissolved by strong _______ - acids Plant fibers can be common at crime scenes because they become ___________ over time - brittle Plant fiber examples - cotton, coir