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45 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Class Evidence |
Because fibers are mass produced, they are considered this type of evidence |
Not individual but... |
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Direct |
Transfer of fibers directly from suspect to victim or victim to suspect |
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24 hours |
Most fiber evidence falls off within this many hours of a crime |
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Color |
Scientists look at this first to try to match a fiber to a location |
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Polarizing |
Type of light microscope that allows scientists to use wavelengths of light to observe optical properties of fibers |
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Infrared |
Type of spectroscopy that allows scientists to visualize chemical structure of fibers |
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Staining |
A destructive test that allows scientists to compare absorption of different liquids into fabrics |
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Density |
A quick test used to classify fabric origins |
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Burn |
This type of test is used to compare melting points, odors, and ash formation of fiber samples |
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Chromatography |
A test used to analyze the components of dyes in a fabric |
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Fiber |
The smallest indivisible unit of a textile; made up of many filaments twisted or bonded together |
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Yarn |
Term for fibers that have been spun together |
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Textile |
Result of weaving yarns together |
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Warp |
The tight lengthwise yarn in a weave pattern |
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Weft |
The crosswise yarn in a weave pattern |
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Twill |
A diagonal weave pattern; resembles stair steps |
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Plain |
The simplest and most common weave pattern; looks like a checkerboard |
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Satin |
Weave pattern in which the Interlacing may not be uniform; results in shiny materials with little friction with other garments |
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Wrinkle |
Plain weave patterns are snag resistant but tend to do this |
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Thread Count |
The number of threads that are packed together for any given amount of fabric |
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Natural |
Term for fibers that come from animals, plants, and mined minerals |
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Synthetic |
Term for man-made fibers produced from a raw material that is spun together in a factory |
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Fur |
Animal fiber left on the skin and treated; often used to make coats and gloves |
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Cashmere |
Fiber produced from goat hair |
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Angora |
Fiber produced from rabbit hair |
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Wool |
Fiber produced from sheep hair |
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Silkworm |
Silk comes from the cocoon of this caterpillar |
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Cellulose |
Plant fibers are made of this carbohydrate |
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Protein |
Animal fibers are made of this type of macromolecule |
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Seed |
Cotton comes from this part of a plant |
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Coconut |
Coir is most often used to make doormats and baskets and comes from this fruit |
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Cannabis |
Hemp comes from this plant |
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Stem |
Jute (used in rope, mats, handbags, and burlap sacks) comes from this part of a plant |
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Flax |
Plant used to make linen |
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Fiberglass |
A common mineral fiber; often used to insulate buildings |
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Asbestos |
Cancer-causing mineral found in rocks; used mainly because of its fire resistance |
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Monomers |
Small, repeating units that make up polymers |
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Regenerated |
This category of fibers are derived from cellulose and produced by chemically modifying the natural polymers to create an entirely new compound not found in nature |
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Cellulose Ester |
Regenerated fibers are made of this compound not found in nature |
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Rayon |
First man-made fiber; also the most common type of regenerated fiber |
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Acetate |
A less expensive, less polluting fiber alternative to rayon |
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Nylon |
The most durable, extremely light weight synthetic fiber; first introduced as artificial silk for pantyhose |
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Polyester |
The synthetic fiber used in polar fleece to provide warmth in the form of a lightweight, soft and resilient fabric |
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Acrylic |
The most widely used man-made fiber; inexpensive but tends to ball easily |
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Spandex |
A synthetic fiber known for its extreme elastic properties |
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