Fiber Test Questions with Correct Verified Answers

Fiber Test Questions with Correct Verified Answers
Weft - ANS Crosswise thread/yarn which wrap around the lengthwise thread/yarn


Warp - ANS Lengthwise thread/yarn that run vertical


Spinneret - ANS Determines the shape of synthetic fibers
-changing the size and shape of these alters the quality of the fiber


Collection methods - ANS Tape
Forceps
Vacuum
Lint roller


Tests that don't damage the fiber: - ANS Microscopy, Light Analysis, Chromatology


Four things you look at when evaluating fiber evidence - ANS Type (composition, rarity,
location in crime scene)
Color (composition of dye)
Number of Fibers (more found=more violent crime)
Origination of Fiber (car, carpet, clothes, etc.)


types of natural fibers - ANS Animal, Plant, and Mineral


Types of animal fibers: - ANS Hair, webbing, fur


Yarn - ANS What fibers that are too short in their natural state are spun into

, -any given yarn has a direction of twist, which forensic scientists analyze


Thread - ANS A very thin type of yarn


Thread count - ANS Number of weft and warp threads in a square inch


Twill Weave - ANS


Tabby Weave - ANS


Satin Weave - ANS


Hair (type of animal fiber) - ANS -Most popular type of animal fiber
-very loosely spun for comfort--> leaves a lot of trace evidence
-Most common fiber=wool from sheep
-ex: wool, cashmere from goats


Wool - ANS Most common type of animal fiber (hair); from sheep
BURN:
-->shrivels up, turns brownish-orange, curls away from flame when heated.
-->Catches fire, yellow then orange flame
-->smells like burnt hair.
DYE:
-->orange-red, dark (second darkest), lighter than cotton
MICROSCOPE:
-->looks like coronal hair