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Textiles
Weave
100
flexible, flat-made by interlacing yarns, threads
What is textile?
100
must be 100 times longer than its width
What is fiber?
100
Two general categories of fiber origins.
What are natural and synthetic?
100
These are derived from cellulose and are mostly plant in origin. The most common type is rayon.
What are regenerated fibers?
100
Surface scales may be visible, fibers up to 3 inches long with tapered ends.
What is wool?
100
Alternating warp and weft threads, firm and wears well.
What is plain?
200
fibers form recognizable patterns
What is a mineral fiber?
200
fibers travel from a source to a person and then to another person
What is secondary transfer?
200
Three sources of natural fibers
What are animal, plant, and mineral?
200
This is added to many natural fibers to provide additional strength. It is found in polar fleece, and wrinkle-resistant pants.
What is polyester?
200
"Flattened hose" appearance, up to 2 inches long, blunt point
What is cotton?
200
Weft is woven over three or more warps and then under one, very strong, dense and compact, soft and pliable.
What is twill?
300
made from a man-made substance such as a plastic
What is synthetic fiber?
300
harvested from plants, animals, or mineral sources
What is natural fiber?
300
Five questions that an investigator asks about a fiber sample.
What are
1. type of fiber
2. fiber color
3. number of fibers found
4. where fibers were found
5. where did textile originate
300
These originate with petroleum products and are non-cellulose-based fibers.
What are synthetic polymer fibers?
300
This textile will vary widely in cross-sectional shape and diameter, straight to gentle curves.
What is synthetic?
300
One weft crosses over three or more warp threads, not durable
What is satin?
400
type of loosely arranged fiber-cotton.
What is amorphous?
400
long chains of repeating units
What is a polymer?
400
Sources for plant fibers
What are seeds, stems, leaves, and fruit?
400
This is easily broken down by light and concentrated acid. It was first introduced as artificial silk, and is a common fiber used in the production of pantyhose.
What is nylon?
400
Does not taper, yet exhibits small variations in diameter, no internal structures.
What is silk?
400
Uses two warp threads and a double weft thread, open weave.
What is Leno?
500
fibers spun together
What is yarn?
500
type of strong, stiff fiber-flax
What is crystalline?
500
Sources of natural fibers
What are animal, plant, and mineral?
500
These are used in performance clothing, are quick drying, and are resistant to wear.
What are olefins?
500
"Bamboo stick" appearance, straight with angles but not curved
What is flax?
500
Two weft threads cross two warp threads, doesn't wrinkle open weave
What is basket?
600
fibers are transferred from victim to suspect or suspect to victim
What is direct transfer?
600
small molecule that may bond together to become a polymer.
What is a monomer?