April 13, 2020
Pencil Lead
Here is a 0.5 mm diameter mechanical pencil lead at 100x magnification (right click image to view at full scale). This particular one is a Pentel super-hi polymer HB lead. The lead is actually made of graphite mixed with a polymer for strength and consistency.
Equipment used: AmScope M150C microscope with Raspberry Pi camera module V2 (8MP).
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