Vocab
These are fibers derived entirely from animal or plant sources.
What are natural fibers?
This was the first synthetic fiber produced (in 1911).
What is rayon?
This is a natural fiber that is collected from the cocoons of the caterpillar.
What is silk?
Fiber is considered this type of evidence.
What is trace/class evidence?
Fibers can originate from these sources.
What are carpet, clothing, linens, furniture, insulation, or rope?
This is cloth material made up of fibers woven or bonded together in a distinctive manner.
What is fabric?
This type of fiber that is currently manufactured is produced solely from synthetic chemicals.
What is synthetic fiber?
This is the most common type of seed fiber.
What is cotton?
These are the two types of transfers of fiber.
What are direct transfer and secondary transfer?
These are 3 strategies to gather fiber evidence.
What are vacuums, sticky tape and forceps?
These are fibers derived from either natural or synthetic polymers.
What are man made fibers?
This synthetic fiber has at least 4 different types.
What is nylon?
Natural fibers can be made out of these two sources.
What are plants and animals?
This type of fiber that is currently manufactured is produced solely from synthetic chemicals.
What is synthetic fiber?
These are fibers that have been spun together.
What is yarn?
This is when fibers cellulose is chemically treated and dissolved in an appropriate solvent before it is forced through the small holes of spinning jet or spinnert to produce fiber.
What is regenerated fibers?
These two types of synthetic fibers were the primary source of evidence in convicting Wayne Williams.
What is nylon and acetate?
This is the most prevalent plant fiber, has a ribbon like shape with twists at irregular intervals.
What is cotton?
This is the most useful property to examine for identifying and comparing fibers (ability to split one light ray into two rays).
What is birefringence?
Fibers can be transferred via these two methods.
What are direct transfer and secondary transfer?
This is a method of separating components of mixtures based on preferential adsorption or partitioning of components in a gas, liquid or solution.
What is chromatography?
Within 24 hours, this percentage of fibers are estimated to have fallen from the victim or been lost from the crime scene.
What is 95%?
This method of comparing the colors of fibers is useful because small samples can be compared and the fiber samples are not destroyed.
What is light microspectrophotometer?