Wool fibers imaged in an ESEM by the use of two (A and B) symmetrical plastic scintillating backscattered electron detectors: Color was obtained by superimposing three images, namely, A+B, A-B and B-A through red, green and blue filters, resulting in sharp topographic contrast with illumination from the two detector directions. Field width=200 microns, 10 kV, 50 pA, 100 Pa pressure. Raw signals without post-processing to remove noise.
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