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A typical construction of a ratchet-based mechanical pencil. A mechanical pencil or clutch pencil is a pencil with a replaceable and mechanically extendable solid pigment core called a "lead" / ˈ l ɛ d /. The lead, often made of graphite, is not bonded to the outer casing, and the user can mechanically extend it as its point is worn away from ...
Lead for mechanical pencils Flexible pencils. Mechanical pencils use mechanical methods to push lead through a hole at the end. These can be divided into two groups: with propelling pencils an internal mechanism is employed to push the lead out from an internal compartment, while clutch pencils merely hold the lead in place (the lead is ...
While many artists use traditional wood pencils, others prefer mechanical pencils or drafting leads. Pencillers may use any lead hardness they wish, although many artists use a harder lead (like a 2H ) to make light lines for initial sketches, then turn to a slightly softer lead (like a HB ) for finishing phases of the drawing.
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Venus pencils became even more popular after the First World War, which had interrupted the supply of pencil from German companies. In high school many people who used Venus brand pencils saw their slogan "Venus Beats All " which oddly was a reference to the ancient Roman dice game in which the "Venus Roll" was the best possible roll.
Traditional and typical styli used for technical drawing are pencils and technical pens. Video of a 1930s dotted-line drawing pen. Pencils in use are usually mechanical pencils with a standard lead thickness. The usual line widths are 0.35 mm, 0.5 mm, 0.7 mm and 1.0 mm. Hardness varies usually from HB to 2H.