Pencil Part 14
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Pencil Part 14
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Transcript of Pencil Part 14
Pencil Part 14
• Although lead has not been used for writing since antiquity, lead poisoning from pencils was not uncommon. Until the middle of the 20th century the paint used for the outer coating could contain high concentrations of lead, and this could be ingested when the pencil was sucked or chewed.[34]