FIBERS

FIBERS ARE NOT UNIQUE.

TRANSFERRED WITH PERSON TO PERSON CONTACT.

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

CAN BE CLASSIFIED AS NATURAL, MANUFACTURES, OR BOTH.

NATURAL FIBERS

MANUFACTURED FIBERS

• Also known as Synthetic Fibers
• Fibers include Rayon, Acetate, and Polyester
• Made from polymers

ANALYZING FIBERS

• Analyzed under a microscope.
• Compared to other types of fibers to find a match.

WAYS TO ANALYZE FIBERS

• Microscopes
• Spectrometer

COMPOUND MICROSCOPE

• Compound: uses the light reflected from the fiber
• Comparison: uses to fibers to make a precise match
• Phase-Contrast: gives some structure to the fiber
• Scanning Electron: converts electrons into a photo

SPECTROMETER

• Separates light into wavelengths

HOW TO ANALYZE FIBERS

• Compare the color and diameter
• Dyed fibers uses chromatography
• Size/length of fibers
• Chemical composition and microscopic appearances