A pencil is a writing implement or art medium usually constructed of a narrow, solid pigment core inside a protective casing. The case prevents the core from breaking, and also from marking the user’s hand during use.
Pencils create marks via physical abrasion, leaving behind a trail of solid core material that adheres to a sheet of paper or other surface. They are noticeably distinct from pens, which dispense liquid or gel ink that stain the light colour of the paper.
Most pencil cores are made of graphite mixed with a clay binder, leaving grey or black marks that can be easily erased. Graphite pencils are used for both writing and drawing, and the result is durable: although writing can usually be removed with an eraser, it is resistant to moisture, most chemicals, ultraviolet radiation and natural aging. Other types of pencil core are less widely used. Charcoal pencils are mainly used by artists for drawing and sketching. Coloured pencils are sometimes used by teachers or editors to correct submitted texts but are more usually regarded as art supplies, especially those with waxy core binders that tend to smear on paper instead of erasing. Grease pencils have a softer crayon-like waxy core that can leave marks on smooth surfaces such as glass or porcelain.
The most common type of pencil casing is a thin wooden cylinder permanently bonded around the core. Similar permanent casings may be constructed of other materials such as plastic or paper. To use the pencil, the casing must be carved or peeled off to expose the working end of the core as a sharp point. Mechanical pencils have more elaborate casings that support mobile pieces of pigment core, which can be extended or retracted through the casing tip as needed.
Other articles related to "pencil, pencils":
... Indelible pencils were the cause of significant health risks due to the presence of aniline dyes ... Penetration of the pencil lead into the body commonly leads to severe and debilitating effects such as fever, anaemia, elevated white cell count, gastro-intestinal upset, kidney and liver ... Such risks are not associated with ordinary graphite pencils ...
... Sanju finds a magic pencil with which if anything is drawn becomes alive ... The Magic Pencil has an ability of making non-living things as well as living things existent ... Sanju creates a boy named Jumroo using the Pencil ...
... Pencil is open source, 2d animation software available for Windows, Mac OS, and Linux ... Pencil is written in C++ and is Qt-based ... It started as a simple "pencil test" program by Patrick Corrieri, extended to the current Pencil application mainly by Pascal Naidon ...
... Two novelty pencil sharpeners were made based on the heads of Posey and Sadie ... The pencil was inserted in an eye socket and the shavings came out of the mouth ... The Posey pencil sharpener appears in a scene in the film Mr ...
... In this instance, the pencil with the eraser added might still not be infringing, but a pencil with a fin or a non-functional button would still infringe, because the thing that was added would serve ...
Famous quotes containing the word pencil:
“For one that comes with a pencil to sketch or sing, a thousand come with an axe or rifle. What a coarse and imperfect use Indians and hunters make of nature! No wonder that their race is so soon exterminated.”
—Henry David Thoreau (18171862)
“The pencil of the Holy Ghost hath laboured more in describing the afflictions of Job than the felicities of Solomon.”
—Francis Bacon (15611626)
“Then, bringing me the joy we feel when wee see a work by our favorite painter which differs from any other that we know, or if we are led before a painting of which we have until then only seen a pencil sketch, if a musical piece heard only on the piano appears before us clothed in the colors of the orchestra, my grandfather called me the [hawthorn] hedge at Tansonville, saying, You who are so fond of hawthorns, look at this pink thorn, isnt it lovely?”
—Marcel Proust (18711922)