Tag
graphite composition
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The Hidden Science Behind What a Pencil Is Made Of
Graphite, the dark heart of every pencil, is not lead—despite the misnomer—and its discovery in 16th-century England was a stroke of luck for artists and...
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Graphite, the dark heart of every pencil, is not lead—despite the misnomer—and its discovery in 16th-century England was a stroke of luck for artists and...