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Photographic gallery.  Thousands of particles under the microscope.

Insect Setae Among Paper Fiber

Transmitted Off Crossed Polarized Light Illumination


Significance in the Environment:

Characteristic Features:

Associated Particles:


This is a tapelift sample from a home. Paper fibers are one of the most common indoor particles.
The insect setae is the yellow fiber running diagonally from the middle upper left to the lower
right. The attachment is to the left. The setae has very low birefringence and an easily visible
medula. The paper fibers are the moderately high birefringent fibers in this field of view. The
The paper fibers seen here include wood fiber and bast fiber. The wood pulp fiber are the wider
fibers and the two bast fibers, derived from herbaceous plants (flax), are narrow and are marked
with periodic cross or slash marks called nodes. The two bast fibers cross one another just to
the right near the tip of the insect setae. Other particles in this view include skin flakes.