Transmitted Off Crossed Circular Polarized Light and Reflected Darkfield Illumination
The paper insulation has reached end-of-life when the tensile strength of the individual paper fibers decreases to the
point that it is below the strength of the bond between fibers in the paper insulation. At that point the paper "powders"
as is the case with this paper particle.
Significance in the Environment:
The paper insulation is in jepardy when these powdered paper particles appear in the oil sample.