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The intention was to create sturdy pencil line art which was dark enough to be reproduced with early photographic technology. It was used as a replacement for lithographic printmaking, just as pen and ink line art essentially took the place of intaglio in late 19th-century illustration.
A writing implement or writing instrument is an object used to produce writing. Writing consists of different figures, lines, and or forms. Writing consists of different figures, lines, and or forms. Most of these items can be also used for other functions such as painting , drawing and technical drawing , but writing instruments generally have ...
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.
A writing implement or writing instrument is an object used to produce writing. Most can be used for other functions, such as painting , drawing and technical drawing . One of the critical characteristics of a writing implement is the ability to produce a smooth, controllable line.
The Blackwing 602 is a pencil that is noted for its soft, dark graphite, unique flat square ferrule and replaceable eraser. It was manufactured by the Eberhard Faber Pencil Company from 1934 to 1988, then by the Faber-Castell pencil company from 1988 to 1994 and by Sanford from 1994 to 1998. [1] The pencil initially sold for 50 cents each.
The first mark sense scanner was the IBM 805 Test Scoring Machine; this read marks by sensing the electrical conductivity of graphite pencil lead using pairs of wire brushes that scanned the page. In the 1930s, Richard Warren at IBM experimented with optical mark sense systems for test scoring, as documented in US Patents 2,150,256 (filed in ...
The difference between the non-photo blue and black ink is great enough that digital image manipulation can separate the two easily. If a black-and-white bitmap setting is scanned in, the exposure or threshold number can be set high enough to detect the black ink or dark images being scanned, but low enough to leave out the non-photo blue.
The grease pencil, a wax writing tool also known as a wax pencil, china marker, or chinagraph pencil (especially in the United Kingdom), is a writing implement made of hardened colored wax and is useful for marking on hard, glossy non-porous surfaces.
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