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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 use.
Student- and scholastic-grade colored pencils lack the high quality pigments and lightfastness of artist-grade products, and their color range is smaller, often limited to 24 or 36 colors. However, using lower-grade colored pencils does have some advantages. Some companies offer erasable colored pencils for beginning artists to experiment with. [8]
Unlike wax-based colored pencils, the erasable variants can be easily erased. Their main use is in sketching, where the objective is to create an outline using the same color that other media (such as wax pencils, or watercolor paints) would fill [45] or when the objective is to scan the color sketch. [46]
The yellow No. 2 pencil remains as reliable for schoolwork as ever, but a mechanical pencil lets students write for hours without interruption, no matter if they tend to press down hard on the page.
In the 1980s, Paper Mate invented the Replay 2000 pen, with erasable ink and a rubber at one end. In 2010, Paper Mate introduced "environmentally friendly" biodegradable pens, pencils and erasers. [7] In 2012, Paper Mate introduced the brand InkJoy. [8]
(1) Colour copy of non-photo blue pencil. (2) Colour copy of blue pen. (3) Grayscale copy of non-photo blue pencil. (4) Grayscale copy of blue pen. Non-photo blue (or non-repro blue) is a common tool in the graphic design and print industry, [1] [2] being a particular shade of blue that cannot be detected by graphic arts camera film. This ...