Glass Fiber from Wallboard Joint Tape
The uniform diameter identifies this as a construction
glass fiber and not glass wool. The assoicated calcite-
filled agglomerates are common when the fibers are from joint tape used in drywall
construction.
Transmitted Off Crossed Polarized Light
Definition/Function:
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:
References:
