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A pencil ( / ˈpɛnsəl / ⓘ) is a writing or drawing implement with a solid pigment core in a protective casing that reduces the risk of core breakage and keeps it from marking the user's hand . Pencils create marks by physical abrasion, leaving a trail of solid core material that adheres to a sheet of paper or other surface.
A commonly-used mechanical pencil lead is identical in density, but not in thickness to a traditional HB (US#2) pencil lead. The hardness depends on the proportion of polymer or resin and graphite in the lead. [16] It is determined by a numerical scale: the higher the number, the harder the lead.
Graphite. Graphite ( / ˈɡræfaɪt /) is a crystalline form of the element carbon. It consists of stacked layers of graphene. Graphite occurs naturally and is the most stable form of carbon under standard conditions. Synthetic and natural graphite are consumed on a large scale (1.3 million metric tons per year in 2022) for uses in pencils ...
Lead is a chemical element; it has symbol Pb (from Latin plumbum) and atomic number 82. It is a heavy metal that is denser than most common materials. Lead is soft and malleable, and also has a relatively low melting point. When freshly cut, lead is a shiny gray with a hint of blue.
number symbol name Mohs hardness [1] Vickers hardness ... 1.2: 26.5–44.7: 82: Pb: lead: 1.5: 38–50: 37.5–41.8 (cast) 83: Bi: ... Mohs hardness of materials ...
But after LaQuan Smith’s Fall/Winter 2024 show on Monday night, Bazaar editors are feeling freshly inspired to put forth the humble No. 2 pencil as a contender for best fall hair accessory.
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