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Photographic gallery.  Thousands of particles under the microscope.
Black on Paper, Transformer Fretting Wear Through the Microscope

Discolored Paper from a Transformer

This is a tapelift from a section of black discoloration on paper insulation from a transformer. The highly reflective metal fretting wear particles are easily visible. Soot would still look black and graphite has much lower reflectivity.

Reflected Darkfield Illumination


Significance in the Environment:

Characteristic Features:

Associated Particles: