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True-TvFibers

Published on Dec 22, 2015

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PRESENTATION OUTLINE

1.

FIBERS ARE GATHERED WITH TWEEZERS, TAPE, OR A VACUUM.
2.

NATURAL FIBERS

USUALLY COME FROM COTTON OR WOOL
3.

MICROSCOPES

HELP DETERMINE WHAT A FIBER IS AND COMPARE IT TO OTHERS
4.

DETERMINING COLOR & DIAMETER

IS THE FIRST STEP IN IDENTIFYING FIBERS
5.

MICROspectrophotometer

  • magnified visual and an infrared pattern at the same time
6.

FIBER ANALYSTS COMPARE:

  • Shape
  • Dye context
  • Size
  • Chemical composition
  • Microscopic appearances
7.

FIBERS USUALLY COME FROM:

  • Clothing
  • Drapery
  • Wigs
  • Carpet
  • Blanket
8.

Manufactured fibers

  • acetate
  • polyester
  • synthetics
  • rayon
9.

UNDER A MICROSCOPE THE ANALYST LOOKS FOR

  • fiber's surface
  • unusual shapes
  • lengthwise striations
  • pits
10.

TYPE OF EVIDENCE

  • Class evidence
  • It can't be linked back to one fiber

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