1What kind of evidence is fiber evidence?
Class evidence
2What are 3 important characteristics of fiber evidence?
Color, shape, chemical composition
3What are the 3 fiber evidence types?
Natural, synthetic, regenerated (man made from natural source)
4Examples of natural fibers...
Cotton, flax or linen, hemp, wood, abestos
5Examples of synthetic fibers...
Nylon, polyester, acrylic
6Examples of regenerated fibers?
Cellulose acetate, rayon
7Traits of cotton fiber?
Twists and lumen
8Trait of synthetic fibers?
Uniform with consistent diameter.
9How can you test for fibers?
Color, shape, cross section, chemical composition.
10What is mod ratio?
Modification ratio = outside diameter/inside diameter, the value will always be greater than one.
11How to test the color of fiber?
Visible Spectroscopy
12How to test chemical composition of fiber?
Infrared Spectroscopy