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Photographic gallery.  Thousands of particles under the microscope.
Glass Fiber Under a Microscope

Glass Fiber from Wallboard Joint Tape

This is glass fiber from wallboard joint tape mounted in 1.550 high dispersion refractive index mounting medium and viewed using phase contrast dispertion staining. The blue color with an orange halo indicates that the glass has a refractive index of about 1.552.

Transmitted Phase Contrast Dispersion Staining


The Joint Tape used to smooth out the joints between drywall panels is reinforced with glass fiber.

Significance in the Environment:

Glass fiber from wallboard joint tape is often a construction residue in new or remodeled buildings. It is seldom at levels that results in health complaints by itself but it can add to the overall level of glass fiber contamination related to construction residues.

Characteristic Features:

This glass fiber typically has a refractive index of about 1.550 and is about 10 micrometers in diameter.

Associated Particles: