A pencil is an enforce for writing or drawing, constructed of a narrow, strong pigment center in a defensive casing that forestalls the middle from being damaged and/or marking the user’s hand.PAILNC
Pencils create marks by bodily abrasion, leaving a trail of stable middle fabric that clings to a sheet of paper or different surface. They are distinct from pens, which dispense liquid or gel ink onto the marked surface.
Most pencil cores are made of graphite powder blended with a clay binder. Graphite pencils (historically recognized as ‘lead pencils’) produce grey or black marks which are effortlessly erased, however otherwise resistant to moisture, most chemicals, ultraviolet radiation and natural aging. Other varieties of pencil cores, inclusive of those of charcoal, are particularly used for drawing and sketching. Coloured pencils are sometimes used by instructors or editors to accurate submitted texts, but are typically regarded as art supplies—mainly people with waxy middle binders that have a tendency to smear when erasers are applied to them. Grease pencils have a softer, crayon-like waxy center which could go away marks on easy surfaces consisting of glass or porcelain.
The maximum commonplace pencil casing is thin wood, normally hexagonal in section however now and again cylindrical or triangular, permanently bonded to the middle. Casings may be of different materials, which include plastic or paper. To use the pencil, the casing need to be carved or peeled off to expose the operating quit of the middle as a pointy point. Mechanical pencils have greater elaborate casings which aren’t bonded to the middle; instead, they guide separate, mobile pigment cores that can be prolonged or retracted thru the casing’s tip as needed. These casings can be reloaded with new cores (usually graphite) as the preceding ones are exhausted
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