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Forensics - Fibers
| Question | Answer |
|---|---|
| How do you classify fibers as either natural or man made? | Natural - animals, plants, or minerals mined from ground. Polymers. Man Made - made by joining together monomers to form polymers |
| How can you analyze fibers? | Microscopes, burn tests, dissolving in various liquids |
| List the types of natural fibers | Animal, plant, mineral |
| Where do natural fibers come from? | Animal - hair, fur, webbing (proteins) Plant - seed, leaf, fruit (cellulose) Mineral - fiber glass, asbestos (neither protein or cellulose) |
| What is the most common natural fiber overall and most common animal fiber? | Natural - cotton Animal - wool |
| List the different types of man-made fibers, give examples | Synthetic (polyester, nylon, acrylic, acetate) Regenerated (rayon) |
| Identify and describe the weave patterns | Plain - one strand over, under Basket - double strand over, under Twill - over, under, every two Satin - over, over, over, under Leno - twisting warp before crossing over weft |
| Characteristics used to identify fibers | color, thickness, texture, flame color, reaction to flame, odor, ash, continuous or sputtering flame |
| Properties of fibers that are most useful for forensic comparisons | color, diameter, cross sectional, shape, chemical composition |
| What is the difference between thread, yarn, and textile? | Yarn is a long continuous strand of interlocked fiber, thread is a type of yarn but thinner and stronger, textile is the finished material made from yarn or thread (like clothing) |
Created by:
elladunmire