Paper Fiber with Sizing
Transmitted Circular Polarized Light Illumination
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Paper fiber of this size with significant amounts of sizing normally indicate the
presence of a
printer or copy machine near this location. Sizing tends to concentrate on the surface
of the paper.
The friction drive wheels of the printer or copy machine apply high tensile loading to
the surface
of the paper and the highest loads are under the elastomeric wheels as they deform under
pressure in
in contact with the paper. This results in the formation of very short fragments of
paper fiber often
coated with sizing. The sizing can be starch, clay, polymer, rosin, or other substance
designed to
control the wicking of inks along the length of the individual fibers and to optimize
paper quality.